{"title":"Integrated Amplifiers","description":"\u003ch2\u003eIntegrated Amplifiers for HiFi \u0026amp; Home Audio\u003c\/h2\u003e\n\n\u003cp\u003eDiscover \u003cstrong\u003eintegrated amplifiers\u003c\/strong\u003e that combine preamplifier control and speaker amplification in one convenient component. Connect your music sources, control volume and drive passive speakers without requiring separate preamp and power amplifier units.\u003c\/p\u003e\n\n\u003cp\u003ePower output, DAC functions, Bluetooth, digital inputs, phono stages and other features vary by model. Choose an integrated amplifier based on your speakers, sources, room and listening needs.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is an Integrated Amplifier?\u003c\/h2\u003e\n\n\u003cp\u003eAn \u003cstrong\u003eintegrated amplifier\u003c\/strong\u003e combines a preamplifier and power amplifier in one device. The preamp handles source selection and volume control, while the power amplifier provides the output needed to drive compatible passive speakers.\u003c\/p\u003e\n\n\u003cp\u003eA typical setup is simple:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAudio Source → Integrated Amplifier → Passive Speakers\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis makes integrated amplifiers a practical choice for stereo HiFi systems where you want strong speaker amplification and flexible source connections without using separate preamp and power amp components.\u003c\/p\u003e\n\n\u003cp\u003eIf you already have a preamp, DAC\/preamp or streamer with volume control, explore our \u003ca href=\"\/pt-br\/collections\/power-amplifiers\"\u003ePower Amplifiers\u003c\/a\u003e instead.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose an Integrated Amplifier?\u003c\/h2\u003e\n\n\u003ch3\u003eAmplification and Control in One Component\u003c\/h3\u003e\n\n\u003cp\u003eAn integrated amplifier combines source control, volume adjustment and speaker amplification, helping reduce the number of separate components and cables in your audio system.\u003c\/p\u003e\n\n\u003cp\u003eDepending on the model, available connections may include \u003cstrong\u003eRCA, optical, coaxial, USB, Bluetooth, phono input\u003c\/strong\u003e and other analog or digital options.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Passive Speakers\u003c\/h3\u003e\n\n\u003cp\u003eIntegrated amplifiers are designed to power compatible passive bookshelf or floorstanding speakers. Output power and supported speaker impedance vary by model, so amplifier and speaker matching remains important.\u003c\/p\u003e\n\n\u003cp\u003eExplore \u003ca href=\"\/pt-br\/collections\/all-amplifiers\"\u003eAll Amplifiers\u003c\/a\u003e if you want to compare integrated, streaming and power amplifier options.\u003c\/p\u003e\n\n\u003ch2\u003eIntegrated Amplifier vs Streaming Amplifier vs Power Amplifier\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eType\u003c\/th\u003e\n      \u003cth\u003eSource \u0026amp; Volume Control\u003c\/th\u003e\n      \u003cth\u003ePowers Passive Speakers\u003c\/th\u003e\n      \u003cth\u003eBest For\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eIntegrated Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n      \u003ctd\u003eFlexible stereo HiFi systems\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eStreaming Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eYes, with streaming features\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n      \u003ctd\u003eNetwork and wireless music systems\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003ePower Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eRequires compatible upstream control\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n      \u003ctd\u003eSystems with a separate preamp or source\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eIf you want network music playback and amplification in one device, browse our \u003ca href=\"\/pt-br\/collections\/streaming-amplifiers\"\u003eStreaming Amplifiers\u003c\/a\u003e. For systems with a separate preamp or compatible source, explore \u003ca href=\"\/pt-br\/collections\/power-amplifiers\"\u003ePower Amplifiers\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eHow to Choose an Integrated Amplifier\u003c\/h2\u003e\n\n\u003ch3\u003eMatch the Amplifier to Your Speakers\u003c\/h3\u003e\n\n\u003cp\u003eCheck your speakers' \u003cstrong\u003eimpedance, sensitivity and recommended amplifier power\u003c\/strong\u003e. The right match depends on the speakers, room size and listening level rather than wattage alone.\u003c\/p\u003e\n\n\u003ch3\u003eChoose the Inputs You Need\u003c\/h3\u003e\n\n\u003cp\u003eThink about every source you plan to connect. Depending on the model, useful connections may include:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRCA\u003c\/strong\u003e for analog sources\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptical or coaxial\u003c\/strong\u003e for compatible digital sources\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB\u003c\/strong\u003e for compatible computers and digital devices\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhono input\u003c\/strong\u003e for compatible turntables\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth\u003c\/strong\u003e for convenient wireless playback\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubwoofer output\u003c\/strong\u003e for compatible 2.1 systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eConnections and features vary by model, so check the individual product specifications before purchasing.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt-In DAC or External DAC?\u003c\/h3\u003e\n\n\u003cp\u003eSome integrated amplifiers include a built-in DAC for digital sources, while others focus primarily on analog amplification. If you already own a DAC you like, an amplifier with suitable analog inputs may be all you need.\u003c\/p\u003e\n\n\u003ch3\u003eConsider Your Current and Future System\u003c\/h3\u003e\n\n\u003cp\u003eChoose enough inputs for the sources you use now and any components you may add later. Turntables, music streamers, TVs, DACs and subwoofers may require different connections.\u003c\/p\u003e\n\n\u003ch2\u003eHow to Connect an Integrated Amplifier\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eMusic Streamer → Integrated Amplifier → Passive Speakers\u003c\/strong\u003e\u003cbr\u003e\nA straightforward way to add network music to a traditional stereo system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDAC → Integrated Amplifier → Passive Speakers\u003c\/strong\u003e\u003cbr\u003e\nIdeal when you already have a separate DAC for digital sources.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTurntable → Integrated Amplifier → Passive Speakers\u003c\/strong\u003e\u003cbr\u003e\nUse a compatible phono input, or add an external phono preamp when required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIntegrated Amplifier → Passive Speakers + Powered Subwoofer\u003c\/strong\u003e\u003cbr\u003e\nChoose a model with a suitable subwoofer output when building a compatible 2.1 system.\u003c\/p\u003e\n\n\u003cp\u003eCables, connectors and other system components can be found in our \u003ca href=\"\/pt-br\/collections\/accessories\"\u003eAudio Accessories\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eDo I need a separate preamp with an integrated amplifier?\u003c\/h3\u003e\n\n\u003cp\u003eUsually not. An integrated amplifier already combines preamplifier functions such as source selection and volume control with speaker amplification.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I match an integrated amplifier with my speakers?\u003c\/h3\u003e\n\n\u003cp\u003eCheck speaker impedance, sensitivity and recommended amplifier power together with the amplifier's specifications. Room size and typical listening level should also be considered rather than choosing by wattage alone.\u003c\/p\u003e\n\n\u003ch3\u003eDo all integrated amplifiers have a built-in DAC or phono input?\u003c\/h3\u003e\n\n\u003cp\u003eNo. Some models include digital inputs and a built-in DAC, while others are primarily analog. Phono inputs, Bluetooth and other features also vary by model, so check each product page for exact specifications.\u003c\/p\u003e\n\n\u003ch3\u003eShould I choose an integrated amplifier or a streaming amplifier?\u003c\/h3\u003e\n\n\u003cp\u003eChoose based on your system. An integrated amplifier is ideal when you want amplification and source control, while a streaming amplifier adds built-in network or wireless streaming features. If you already own a separate music streamer, a traditional integrated amplifier may be the simpler choice.\u003c\/p\u003e\n\n\u003ch2\u003eComplete Your HiFi System\u003c\/h2\u003e\n\n\u003cp\u003eExplore related EMIUZEK collections to build or upgrade your stereo system:\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/pt-br\/collections\/all-amplifiers\"\u003e\u003cstrong\u003eAll Amplifiers\u003c\/strong\u003e\u003c\/a\u003e — Compare integrated, streaming and power amplifier options.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/pt-br\/collections\/streaming-amplifiers\"\u003e\u003cstrong\u003eStreaming Amplifiers\u003c\/strong\u003e\u003c\/a\u003e — Combine network music streaming and speaker amplification.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/pt-br\/collections\/power-amplifiers\"\u003e\u003cstrong\u003ePower Amplifiers\u003c\/strong\u003e\u003c\/a\u003e — Add dedicated amplification to a system with a compatible preamp or source.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/pt-br\/collections\/accessories\"\u003e\u003cstrong\u003eAudio Accessories\u003c\/strong\u003e\u003c\/a\u003e — Find cables, connectors and other essentials for your audio system.\u003c\/p\u003e","products":[{"product_id":"arylic-ha400","title":"RAKOSO HA400","description":"\u003cp\u003eRAKOSO HA400 is a professional 4-zone network streaming amplifier designed for whole-home audio systems, commercial background music installations, and multi-room speaker setups.\u003c\/p\u003e\n\u003cp\u003eWith four independent amplifier zones, network streaming support, AirPlay 2, Spotify Connect, multi-room control, and flexible audio inputs and outputs, HA400 provides a complete solution for powering and managing multiple speaker areas from a single device.\u003c\/p\u003e\n\u003cp\u003eEach zone delivers 50W × 2 stereo amplification at 8Ω or 100W bridge mode output at 4Ω, allowing direct connection to passive speakers without additional power amplifiers. \u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\n\u003ch3\u003eFour-Zone Amplification System\u003c\/h3\u003e\n\u003cp\u003eHA400 combines four independent streaming amplifiers into one centralized audio system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour separate audio zones\u003c\/li\u003e\n\u003cli\u003e50W × 2 stereo output per zone\u003c\/li\u003e\n\u003cli\u003eBridge mode up to 100W\u003c\/li\u003e\n\u003cli\u003eDirect connection to passive speakers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComplete Whole-Home Audio Solution\u003c\/h3\u003e\n\u003cp\u003eControl multiple rooms from one device.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlay different music in different zones\u003c\/li\u003e\n\u003cli\u003eSynchronize all zones together\u003c\/li\u003e\n\u003cli\u003eManage playback through the 4STREAM app\u003c\/li\u003e\n\u003cli\u003eSuitable for residential and commercial installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModern Network Streaming\u003c\/h3\u003e\n\u003cp\u003eHA400 supports popular streaming platforms and network protocols.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAirPlay 2\u003c\/li\u003e\n\u003cli\u003eSpotify Connect\u003c\/li\u003e\n\u003cli\u003eDLNA\u003c\/li\u003e\n\u003cli\u003eUPnP\u003c\/li\u003e\n\u003cli\u003eQplay\u003c\/li\u003e\n\u003cli\u003eInternet music services\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProfessional Installation Features\u003c\/h3\u003e\n\u003cp\u003eDesigned for advanced audio installations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRack-mountable design\u003c\/li\u003e\n\u003cli\u003eRS232 smart control integration\u003c\/li\u003e\n\u003cli\u003e12V trigger support\u003c\/li\u003e\n\u003cli\u003eMultiple digital and analog connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWhole-home audio systems\u003c\/li\u003e\n\u003cli\u003eMulti-room speaker installations\u003c\/li\u003e\n\u003cli\u003eCommercial background music systems\u003c\/li\u003e\n\u003cli\u003eRestaurants, offices, and retail spaces\u003c\/li\u003e\n\u003cli\u003eProfessional custom audio projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUsers looking for a simple single-room amplifier\u003c\/li\u003e\n\u003cli\u003eDesktop audio systems\u003c\/li\u003e\n\u003cli\u003eUsers needing a portable streaming device\u003c\/li\u003e\n\u003cli\u003eUsers without multiple speaker zones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRAKOSO HA400 is a multi-zone streaming amplifier with built-in amplification.\u003c\/li\u003e\n\u003cli\u003eEach zone can directly drive passive speakers.\u003c\/li\u003e\n\u003cli\u003eExternal power amplifiers are not required for normal installations.\u003c\/li\u003e\n\u003cli\u003eSpeaker impedance and wiring should match the amplifier output specifications.\u003c\/li\u003e\n\u003cli\u003eDesigned mainly for whole-home and professional installations rather than simple personal audio setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eCan RAKOSO HA400 directly power passive speakers?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eHA400 includes four built-in amplifier zones and can directly drive passive speakers.\u003c\/p\u003e\n\u003cp\u003eTypical setup:\u003c\/p\u003e\n\u003cp\u003eStreaming Source → HA400 → Passive Speakers\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eHow many rooms can RAKOSO HA400 control?\u003c\/h3\u003e\n\u003cp\u003eHA400 supports four independent audio zones.\u003c\/p\u003e\n\u003cp\u003eEach zone can play different content or synchronize with other zones.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCan different rooms play different music at the same time?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eEach zone can operate independently through the 4STREAM application.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eDoes RAKOSO HA400 support AirPlay 2?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eHA400 supports AirPlay 2 for wireless streaming from compatible Apple devices.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eDoes RAKOSO HA400 support Spotify Connect?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eHA400 supports Spotify Connect for direct network streaming.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat speakers can be used with RAKOSO HA400?\u003c\/h3\u003e\n\u003cp\u003eHA400 supports passive speakers connected directly to each amplifier zone.\u003c\/p\u003e\n\u003cp\u003eEach zone provides:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e50W × 2 @ 8Ω stereo mode\u003c\/li\u003e\n\u003cli\u003e100W bridge mode @ 4Ω\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCan RAKOSO HA400 be installed in a rack?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eHA400 is designed for professional installations and supports rack mounting.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCan RAKOSO HA400 integrate with smart home systems?\u003c\/h3\u003e\n\u003cp\u003eYes.\u003c\/p\u003e\n\u003cp\u003eHA400 supports RS232 control for integration with compatible automation systems.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\n\u003ch3\u003eWhole Home Audio Setup\u003c\/h3\u003e\n\u003cp\u003eSource icon: Streaming Services\u003cbr\u003eSource: AirPlay \/ Spotify \/ Network Music\u003cbr\u003eConnection: WiFi \/ Ethernet\u003cbr\u003eOutput connection: Speaker Output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Multiple Passive Speakers\u003c\/p\u003e\n\u003cp\u003eNote: Build a complete multi-room audio system.\u003c\/p\u003e\n\u003ch3\u003eIndividual Zone Setup\u003c\/h3\u003e\n\u003cp\u003eSource icon: smartphone\u003cbr\u003eSource: Streaming App\u003cbr\u003eConnection: Network\u003cbr\u003eOutput connection: Zone Speaker Output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive Speakers\u003c\/p\u003e\n\u003cp\u003eNote: Control each room independently.\u003c\/p\u003e\n\u003ch3\u003eProfessional Installation Setup\u003c\/h3\u003e\n\u003cp\u003eSource icon: Smart Home Controller\u003cbr\u003eSource: Automation System\u003cbr\u003eConnection: RS232\u003cbr\u003eOutput connection: HA400\u003cbr\u003eTarget icon: Multi-zone Speakers\u003c\/p\u003e\n\u003cp\u003eNote: Integrate HA400 into custom audio systems.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eAmplifier\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003e4-Zone Network Streaming Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier Type\u003c\/td\u003e\n\u003ctd\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Zones\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003e50W × 2 @ 8Ω per zone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBridge Mode\u003c\/td\u003e\n\u003ctd\u003e100W @ 4Ω per zone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Output\u003c\/td\u003e\n\u003ctd\u003ePassive Speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eStreaming \u0026amp; Connectivity\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003e2.4GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet\u003c\/td\u003e\n\u003ctd\u003eRJ45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStreaming Protocols\u003c\/td\u003e\n\u003ctd\u003eAirPlay 2 \/ Spotify Connect \/ DLNA \/ UPnP \/ Qplay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-Room\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAudio Inputs\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input\u003c\/td\u003e\n\u003ctd\u003eRCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Input\u003c\/td\u003e\n\u003ctd\u003eOptical \/ Coaxial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003ctd\u003eUSB Storage Playback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAudio Outputs\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Output\u003c\/td\u003e\n\u003ctd\u003e4 Zones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre Output\u003c\/td\u003e\n\u003ctd\u003eRCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Output\u003c\/td\u003e\n\u003ctd\u003eOptical \/ Coaxial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Output\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAudio Performance\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio Decode\u003c\/td\u003e\n\u003ctd\u003eUp to 24-bit \/ 192kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Formats\u003c\/td\u003e\n\u003ctd\u003eFLAC \/ MP3 \/ AAC \/ AAC+ \/ ALAC \/ APE \/ WAV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e20Hz–20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD+N\u003c\/td\u003e\n\u003ctd\u003e0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd\u003e93dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eControl\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp Control\u003c\/td\u003e\n\u003ctd\u003e4STREAM App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmart Home Control\u003c\/td\u003e\n\u003ctd\u003eRS232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrigger\u003c\/td\u003e\n\u003ctd\u003e12V Trigger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhole Home Audio\u003c\/td\u003e\n\u003ctd\u003eNetwork → HA400 → Multiple Speaker Zones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial Audio\u003c\/td\u003e\n\u003ctd\u003eStreaming Source → HA400 → Ceiling Speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-Room Setup\u003c\/td\u003e\n\u003ctd\u003e4 Zones → Different Rooms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRAKOSO HA400 ×1\u003c\/li\u003e\n\u003cli\u003eRack Mount Accessories ×1\u003c\/li\u003e\n\u003cli\u003ePower Cable ×1\u003c\/li\u003e\n\u003cli\u003eUser Manual ×1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMIUZEK Download Center\u003c\/h2\u003e\n\u003cp\u003eAccess product manuals, firmware updates, and additional support resources.\u003c\/p\u003e\n\u003cp\u003eRAKOSO HA400 manuals and downloads:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/emiuzek.com\/pages\/download\"\u003e\u003cspan\u003ehttps:\/\/emiuzek.com\/pages\/download\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\n\u003ch3\u003eRAKOSO HA400 vs RAKOSO H400\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eHA400\u003c\/th\u003e\n\u003cth\u003eH400\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Position\u003c\/td\u003e\n\u003ctd\u003e4-Zone Streaming Amplifier\u003c\/td\u003e\n\u003ctd\u003e4-Zone Streaming Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in Amplifier\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Output\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Amplifier Required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZones\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirPlay 2\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpotify Connect\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest Use\u003c\/td\u003e\n\u003ctd\u003eComplete multi-room speaker system\u003c\/td\u003e\n\u003ctd\u003eExisting amplifier installations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Arylic","offers":[{"title":"EU","offer_id":43670757638237,"sku":"Arylic-RAKOSO-HA400-EU","price":1106.38,"currency_code":"USD","in_stock":true},{"title":"US","offer_id":43670757671005,"sku":"Arylic-RAKOSO-HA400-US","price":2499.0,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":43712809042013,"sku":"Arylic-RAKOSO-HA400-UK","price":2499.0,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":43712809074781,"sku":"Arylic-RAKOSO-HA400-AU","price":2499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/RAKOSO_HA400.webp?v=1784785196"},{"product_id":"fosi-audio-bt20a","title":"Fosi Audio BT20A","description":"\u003cp\u003eFosi Audio BT20A is a compact two-channel Class-D integrated amplifier for passive speakers, with Bluetooth and RCA inputs.\u003c\/p\u003e\u003cp\u003eIt combines straightforward wireless playback, bass and treble adjustment, and up to 100 W per channel maximum output in a small desktop-friendly chassis.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eCompact passive-speaker amplifier\u003c\/h3\u003e\u003cp\u003eProvides stereo speaker amplification without the size and complexity of a full-size receiver.\u003c\/p\u003e\u003ch3\u003eBluetooth and wired playback\u003c\/h3\u003e\u003cp\u003eSwitch between Bluetooth 5.0 streaming and an analog RCA source.\u003c\/p\u003e\u003ch3\u003eFront-panel tone control\u003c\/h3\u003e\u003cp\u003eIndependent bass and treble knobs make quick system tuning simple.\u003c\/p\u003e\n\u003ch3\u003eSimple everyday operation\u003c\/h3\u003e\u003cp\u003eA compact front panel keeps power, volume, bass and treble adjustment immediately accessible without menus or an app.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eBookshelf speakers in small and medium rooms\u003c\/li\u003e\n\u003cli\u003eSimple Bluetooth stereo systems\u003c\/li\u003e\n\u003cli\u003eTVs or streamers with analog line output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystems requiring HDMI ARC, optical or USB input\u003c\/li\u003e\n\u003cli\u003eUsers needing a subwoofer output\u003c\/li\u003e\n\u003cli\u003eHeadphone listening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBT20A powers passive speakers; it is not intended as an input for powered speakers.\u003c\/li\u003e\n\u003cli\u003eThe quoted 100 W × 2 is the manufacturer's maximum specification and depends on load and power supply.\u003c\/li\u003e\n\u003cli\u003eIt has no phono stage, so most turntables require a phono preamplifier or line-level output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media (max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important;margin-right:0!important}}.pbg__notes .emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0;\"\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioBT20A_003-00.webp?v=1758286545\" alt=\"Fosi Audio BT20A Bluetooth stereo amplifier\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioBT20A_005-00.webp?v=1758286545\" alt=\"Fosi Audio BT20A passive speaker system setup\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan it drive passive speakers directly?\u003c\/h3\u003e\u003cp\u003eYes. It supports 2–8 Ω passive speakers through the rear binding posts.\u003c\/p\u003e\u003ch3\u003eCan it connect to active speakers?\u003c\/h3\u003e\u003cp\u003eNo dedicated pre-output is provided. Use BT20A to power passive speakers.\u003c\/p\u003e\u003ch3\u003eDoes it have a subwoofer output?\u003c\/h3\u003e\u003cp\u003eNo.\u003c\/p\u003e\u003ch3\u003eCan I connect a turntable?\u003c\/h3\u003e\u003cp\u003eOnly when the turntable has a built-in phono stage or an external phono preamplifier is used.\u003c\/p\u003e\u003ch3\u003eDoes it support aptX?\u003c\/h3\u003e\u003cp\u003eThe official specification lists Bluetooth 5.0 but does not specify aptX support.\u003c\/p\u003e\u003ch3\u003eCan I connect a TV?\u003c\/h3\u003e\u003cp\u003eYes, when the TV provides compatible analog audio output; there is no optical or HDMI input.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eBluetooth speaker system\u003c\/h3\u003e\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ tablet\u003cbr\u003eConnection: Bluetooth 5.0\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003ch3\u003eWired stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ TV analog output\u003cbr\u003eConnection: RCA\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\n\u003ch3\u003eTurntable stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: turntable\u003cbr\u003eSource: Turntable with built-in phono stage or external phono preamplifier\u003cbr\u003eConnection: RCA line input\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003cp\u003eNote: Do not connect a phono-level turntable directly unless a compatible phono preamplifier is used.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth 5.0\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eRCA line input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eOutputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eStereo speaker binding posts\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eAmplifier Architecture\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eAmplifier Chipset\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eDual TI TPA3116D2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eMaximum Output Power\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e100 W × 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSpeaker Impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2–8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eFrequency Response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e20 Hz–20 kHz (±1 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≥98 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≤0.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and power\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to approximately 15 m \/ 50 ft without obstacles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eDC Input Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e12–24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSupplied Power Adapter\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e24 V \/ 4.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: BT20A or BT20A Pro?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:520px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAmplifier chip\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDual TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMaximum output\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e100 W × 2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e300 W × 2 at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003ePre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e3.5 mm variable pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBest use\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSimple compact stereo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHigher-output expandable stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ EU","offer_id":43721462186077,"sku":"Fosi-Audio-BT20A-Black-EU","price":78.08,"currency_code":"USD","in_stock":true},{"title":"Black \/ US","offer_id":43721462218845,"sku":"Fosi-Audio-BT20A-Black-US","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43672438833245,"sku":"Fosi-Audio-BT20A-Black-UK","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43721462153309,"sku":"Fosi-Audio-BT20A-Black-AU","price":79.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_d330e9a2-7028-4099-a066-f2c1da41e853.webp?v=1785219705"},{"product_id":"fosi-audio-bt20a-pro","title":"Fosi Audio BT20A Pro","description":"\u003cp\u003eFosi Audio BT20A Pro is a compact Bluetooth stereo integrated amplifier built around the TI TPA3255 for passive speakers.\u003c\/p\u003e\u003cp\u003eIt adds RCA input, a variable 3.5 mm pre-out, bass and treble controls, replaceable op-amps and multiple power-supply options for a flexible desktop or room stereo system.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eTPA3255 stereo amplification\u003c\/h3\u003e\u003cp\u003eDelivers high-efficiency Class-D power with low specified distortion in a compact chassis.\u003c\/p\u003e\u003ch3\u003eVariable pre-out expansion\u003c\/h3\u003e\u003cp\u003eThe 3.5 mm pre-out can feed compatible powered speakers, a powered subwoofer or another amplifier.\u003c\/p\u003e\u003ch3\u003eReplaceable op-amps\u003c\/h3\u003e\u003cp\u003eSocketed NE5532 op-amps allow experienced users to tailor the analog stage with compatible DIP8 replacements.\u003c\/p\u003e\u003ch3\u003eFlexible power configurations\u003c\/h3\u003e\u003cp\u003eAvailable power-supply choices let buyers balance system output, size and cost.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop and bookshelf passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eCompact stereo systems with a powered subwoofer\u003c\/li\u003e\n\u003cli\u003eBluetooth and RCA source switching\u003c\/li\u003e\n\u003cli\u003eUsers interested in compatible op-amp rolling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystems requiring HDMI ARC, optical or USB input\u003c\/li\u003e\n\u003cli\u003eUsers needing a headphone output\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaximum power depends on the selected supply and speaker load; choose the power-supply variant appropriate for the system.\u003c\/li\u003e\n\u003cli\u003eThe 3.5 mm connector is a pre-out, not a headphone jack.\u003c\/li\u003e\n\u003cli\u003eBluetooth takes input priority; disconnect Bluetooth when using RCA if the wired source is not heard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media (max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important;margin-right:0!important}}.pbg__notes .emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0;\"\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_PRO_002.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro TPA3255 stereo amplifier\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_PRO_004.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro desktop listening setup\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_PRO_007.webp?v=1758430247\" alt=\"Fosi Audio BT20A Pro stereo system connection\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan it power passive speakers?\u003c\/h3\u003e\u003cp\u003eYes. It supports 2–8 Ω passive speakers.\u003c\/p\u003e\u003ch3\u003eCan it connect to a powered subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, through the variable 3.5 mm pre-out using the appropriate cable.\u003c\/p\u003e\u003ch3\u003eIs the pre-out a headphone output?\u003c\/h3\u003e\u003cp\u003eNo.\u003c\/p\u003e\u003ch3\u003eCan I connect a turntable?\u003c\/h3\u003e\u003cp\u003eYes only through a turntable with line output or an external phono stage.\u003c\/p\u003e\u003ch3\u003eDoes it support aptX?\u003c\/h3\u003e\u003cp\u003eNo. The official documentation specifies SBC\/AAC and states that aptX variants are not supported.\u003c\/p\u003e\u003ch3\u003eCan RCA and Bluetooth play simultaneously?\u003c\/h3\u003e\u003cp\u003eNo. Only one input mode is used at a time.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003ePassive speaker system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003ch3\u003e2.1 stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC\u003cbr\u003eConnection: RCA\u003cbr\u003eOutput connection: Speaker terminals + 3.5 mm pre-out\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers + powered subwoofer\u003c\/p\u003e\n\u003ch3\u003ePre-out expansion system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: 3.5 mm variable pre-out\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Powered speakers, powered subwoofer or downstream amplifier\u003c\/p\u003e\u003cp\u003eNote: Confirm input compatibility and begin with the volume set low.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth 5.0\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eRCA line input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eOutputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eStereo speaker binding posts\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003e3.5 mm variable pre-out\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eAmplifier Chip\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eTI TPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eMaximum Output Power\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e300 W × 2 at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSpeaker Impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2–8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≤0.005%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≥108 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eFrequency Response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e20 Hz–20 kHz (±1.2 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSocketed Op-Amps\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2 × NE5532\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and power\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth Codecs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eSBC \/ AAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to 50 ft without obstacles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eDC Input Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e24–48 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003ePower Supply Options\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e32 V \/ 5 A or 48 V \/ 5 A, depending on variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eapproximately 5 × 5 × 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: BT20A or BT20A Pro?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:520px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT20A Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAmplifier chip\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDual TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMaximum output\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e100 W × 2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e300 W × 2 at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003ePre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e3.5 mm variable pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBest use\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSimple compact stereo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHigher-output expandable stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Blue \/ 32V 5A","offer_id":43721477881949,"sku":"Fosi-Audio-BT20A-Pro-Blue-32V-5A","price":89.25,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 48V 5A","offer_id":43721477914717,"sku":"Fosi-Audio-BT20A-Pro-Blue-48V-5A","price":105.9,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 48V 5A GaN","offer_id":43721477947485,"sku":"Fosi-Audio-BT20A-Pro-Blue-48V-5A-GaN","price":105.9,"currency_code":"USD","in_stock":true},{"title":"Blue \/ No Power Supply","offer_id":43721477980253,"sku":"Fosi-Audio-BT20A-Pro-Blue-No-Power-Supply","price":105.9,"currency_code":"USD","in_stock":true},{"title":"Gray \/ 32V 5A","offer_id":43669225373789,"sku":"Fosi-Audio-BT20A-Pro-Gray-32V-5A","price":105.9,"currency_code":"USD","in_stock":true},{"title":"Gray \/ 48V 5A","offer_id":43669231763549,"sku":"Fosi-Audio-BT20A-Pro-Gray-48V-5A","price":112.53,"currency_code":"USD","in_stock":true},{"title":"Gray \/ 48V 5A GaN","offer_id":43669231796317,"sku":"Fosi-Audio-BT20A-Pro-Gray-48V-5A-GaN","price":119.9,"currency_code":"USD","in_stock":true},{"title":"Gray \/ No Power Supply","offer_id":43669231829085,"sku":"Fosi-Audio-BT20A-Pro-Gray-No-Power-Supply","price":93.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT20A_Pro_09d9b862-6793-4e97-b13b-60a3cdaefd39.webp?v=1785219705"},{"product_id":"fosi-mc331","title":"Fosi Audio MC331","description":"\u003cp\u003eFosi Audio MC331 is a compact tube integrated amplifier combining digital and analog source selection, speaker amplification, headphone listening and preamplifier output.\u003c\/p\u003e\u003cp\u003eIts replaceable tubes, illuminated VU meter, remote control and 105W × 2 maximum output at 4Ω make it a flexible desktop or bookshelf-speaker hub.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eAll-in-one audio hub\u003c\/h3\u003e\u003cp\u003eCombines a DAC, integrated speaker amplifier, preamplifier and headphone amplifier in one compact chassis.\u003c\/p\u003e\u003ch3\u003eFive source inputs\u003c\/h3\u003e\u003cp\u003eAccepts Bluetooth, USB, optical, coaxial and RCA sources with remote input switching.\u003c\/p\u003e\u003ch3\u003eTube character with visual appeal\u003c\/h3\u003e\u003cp\u003eReplaceable 5654W-family tubes and a warm VU meter add adjustable tube character and a retro presentation.\u003c\/p\u003e\u003ch3\u003eFlexible system expansion\u003c\/h3\u003e\u003cp\u003eDrives passive speakers while pre-out and 3.5mm headphone outputs support additional listening configurations.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop and small-room passive speaker systems\u003c\/li\u003e\n\u003cli\u003eUsers switching between computer, TV, Bluetooth and analog sources\u003c\/li\u003e\n\u003cli\u003eHeadphone and speaker listening from one compact component\u003c\/li\u003e\n\u003cli\u003eListeners who enjoy replaceable tubes and VU-meter styling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTurntables without a built-in or external phono preamp\u003c\/li\u003e\n\u003cli\u003eSystems requiring HDMI ARC\u003c\/li\u003e\n\u003cli\u003ePassive subwoofers that need a dedicated powered subwoofer channel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"width:100%;max-width:1100px;margin:8px auto 32px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosioAudioMC331003.webp?v=1758366705\" alt=\"Fosi Audio MC331 tube integrated amplifier power and core performance\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosioAudioMC331006.webp?v=1758366705\" alt=\"Fosi Audio MC331 Bluetooth, USB, optical, coaxial and RCA connections\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosioAudioMC331005.webp?v=1758366705\" alt=\"Fosi Audio MC331 passive speaker, headphone and powered subwoofer system scenarios\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\n\u003c\/div\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMC331 is an integrated amplifier and can directly drive 4–8Ω passive speakers.\u003c\/li\u003e\n\u003cli\u003eIts RCA input is line level; a conventional turntable requires a phono preamp.\u003c\/li\u003e\n\u003cli\u003ePre-out is for an active subwoofer or downstream amplifier; it is not a passive subwoofer output.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan MC331 drive passive speakers directly?\u003c\/h3\u003e\u003cp\u003eYes. Connect 4–8Ω passive speakers to its speaker terminals.\u003c\/p\u003e\u003ch3\u003eDoes it include a phono input?\u003c\/h3\u003e\u003cp\u003eNo. A turntable needs a built-in phono stage or a separate phono preamp before the RCA input.\u003c\/p\u003e\u003ch3\u003eCan I connect a TV?\u003c\/h3\u003e\u003cp\u003eYes, through optical, coaxial or RCA audio output. MC331 does not provide HDMI ARC.\u003c\/p\u003e\u003ch3\u003eCan I use headphones?\u003c\/h3\u003e\u003cp\u003eYes. It includes a front 3.5mm headphone output.\u003c\/p\u003e\u003ch3\u003eCan I add a subwoofer?\u003c\/h3\u003e\u003cp\u003eYes. Use pre-out with a powered subwoofer or another compatible downstream device.\u003c\/p\u003e\u003ch3\u003eAre the tubes replaceable?\u003c\/h3\u003e\u003cp\u003eYes. Officially listed compatible families include 6AK5, 6AK5W, 6Zh1P and 6J1.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003ePassive speaker system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Phone, computer, TV or line-level source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth, USB, optical, coaxial or RCA\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e 4–8Ω passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Select the matching input and begin at low volume.\u003c\/p\u003e\u003ch3\u003eHeadphone setup\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Digital or analog source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth, USB, optical, coaxial or RCA\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone output\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Wired headphones\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Disconnect or lower speaker output before private listening.\u003c\/p\u003e\u003ch3\u003e2.1 system with powered subwoofer\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Digital or analog source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Chosen source input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals + pre-out\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers + powered subwoofer\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Use the subwoofer's own level and crossover controls for integration.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eCore specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eTube integrated DAC \/ amplifier \/ headphone amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum speaker output\u003c\/td\u003e\n\u003ctd\u003e105W × 2 at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker impedance\u003c\/td\u003e\n\u003ctd\u003e4–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e≤0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd\u003e≥100dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003e24V \/ 4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eInputs and outputs\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eBluetooth, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003ePassive speaker terminals, pre-out, 3.5mm headphone output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth codecs\u003c\/td\u003e\n\u003ctd\u003eSBC, AAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaceable tubes\u003c\/td\u003e\n\u003ctd\u003e6AK5, 6AK5W, 6Zh1P, 6J1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesktop speakers\u003c\/td\u003e\n\u003ctd\u003ePC → USB → MC331 → Passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTV audio\u003c\/td\u003e\n\u003ctd\u003eTV optical output → MC331 → Passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.1 system\u003c\/td\u003e\n\u003ctd\u003eSource → MC331 → Passive speakers + powered subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eFosi Audio product comparison\u003c\/h3\u003e\u003cp\u003eCompare the two compact Fosi Audio integrated amplifiers by the differences that most affect system matching.\u003c\/p\u003e\u003cdiv style=\"max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"min-width:760px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"min-width:150px;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eMC331\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eMC351\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct position\u003c\/th\u003e\n\u003ctd\u003eTube DAC \/ integrated stereo amplifier\u003c\/td\u003e\n\u003ctd\u003eHigh-power 2.1 digital integrated amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBuilt-in speaker amplifier\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum output\u003c\/th\u003e\n\u003ctd\u003e105W × 2 at 4Ω\u003c\/td\u003e\n\u003ctd\u003e165W × 2 + 350W at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMain inputs\u003c\/th\u003e\n\u003ctd\u003eBluetooth, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.3, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker output\u003c\/th\u003e\n\u003ctd\u003eStereo passive speakers\u003c\/td\u003e\n\u003ctd\u003eStereo passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePassive subwoofer output\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes, dedicated amplified output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLine-level pre-out\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone output\u003c\/th\u003e\n\u003ctd\u003eYes, 3.5mm\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube stage\u003c\/th\u003e\n\u003ctd\u003eYes, replaceable tubes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBest use\u003c\/th\u003e\n\u003ctd\u003eCompact tube stereo and headphone system\u003c\/td\u003e\n\u003ctd\u003ePowerful passive-speaker 2.1 system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43673909035101,"sku":"Fosi-Audio-MC331-Black-US","price":143.77,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43673909067869,"sku":"Fosi-Audio-MC331-Black-EU","price":129.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43673909100637,"sku":"Fosi-Audio-MC331-Black-AU","price":129.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43673909133405,"sku":"Fosi-Audio-MC331-Black-UK","price":129.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC331_f0e033c2-3c7e-4420-a18f-ed97a2880999.webp?v=1785378303"},{"product_id":"fosi-gr40","title":"Fosi Audio GR40","description":"\u003cp\u003eFosi Audio GR40 is a desktop tube DAC, headphone amplifier and preamplifier for digital and Bluetooth sources.\u003c\/p\u003e\u003cp\u003eUSB, optical, coaxial and Bluetooth inputs, replaceable 5654W tubes, tone controls and RCA pre-output make it a flexible centerpiece for headphones or powered audio systems.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eMulti-input desktop DAC\u003c\/h3\u003e\u003cp\u003eAccepts USB, optical, coaxial and Bluetooth sources in one compact component.\u003c\/p\u003e\u003ch3\u003eTube analog stage\u003c\/h3\u003e\u003cp\u003eTwo replaceable 5654W tubes add tube-based amplification and visual character.\u003c\/p\u003e\u003ch3\u003eHeadphone and preamp operation\u003c\/h3\u003e\u003cp\u003eUse the front 3.5mm headphone output or feed powered speakers and power amplifiers from RCA.\u003c\/p\u003e\u003ch3\u003eHigh-resolution and codec support\u003c\/h3\u003e\u003cp\u003eSupports PCM 32-bit\/384kHz, DSD256 and Bluetooth codecs including aptX HD and aptX LL.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop headphone listening\u003c\/li\u003e\n\u003cli\u003eTVs with optical audio output\u003c\/li\u003e\n\u003cli\u003eComputers using USB audio\u003c\/li\u003e\n\u003cli\u003ePowered speakers or separate power amplifiers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirectly driving passive speakers\u003c\/li\u003e\n\u003cli\u003eBalanced headphone or XLR systems\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGR40 is not a speaker power amplifier; passive speakers require a separate power amplifier.\u003c\/li\u003e\n\u003cli\u003eThe RCA output is muted when headphones are connected.\u003c\/li\u003e\n\u003cli\u003eAllow the tubes to cool before removal and only use officially compatible replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media(max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0\"\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40002.webp?v=1758425472\" alt=\"Tube Preamp\/Headphone Amp with DAC\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40003.webp?v=1758425473\" alt=\"Fosi Audio GR40\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioGR40006.webp?v=1758425472\" alt=\"Fosi Audio GR40\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan GR40 power passive speakers?\u003c\/h3\u003e\u003cp\u003eNo. Connect its RCA output to a separate power amplifier or use powered speakers.\u003c\/p\u003e\u003ch3\u003eCan it connect to a TV?\u003c\/h3\u003e\u003cp\u003eYes, through a compatible optical or coaxial digital output.\u003c\/p\u003e\u003ch3\u003eDoes it include a phono input?\u003c\/h3\u003e\u003cp\u003eNo. A turntable requires a built-in or external phono preamplifier.\u003c\/p\u003e\u003ch3\u003eWhich headphones are supported?\u003c\/h3\u003e\u003cp\u003eThe official range is 32–300Ω through the 3.5mm output.\u003c\/p\u003e\u003ch3\u003eCan the tubes be replaced?\u003c\/h3\u003e\u003cp\u003eYes, but only with compatible tube types and after the unit is powered off and cool.\u003c\/p\u003e\u003ch3\u003eWhat Bluetooth codecs are supported?\u003c\/h3\u003e\u003cp\u003eSBC, AAC, aptX, aptX HD and aptX LL are listed in the manual.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eComputer headphone system\u003c\/h3\u003e\u003cp\u003eSource icon: computer\u003cbr\u003eSource: Windows PC \/ Mac\u003cbr\u003eConnection: USB audio\u003cbr\u003eOutput connection: 3.5mm headphone output\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: Wired headphones\u003c\/p\u003e\u003ch3\u003eTV headphone system\u003c\/h3\u003e\u003cp\u003eSource icon: tv\u003cbr\u003eSource: TV\u003cbr\u003eConnection: Optical or coaxial PCM\u003cbr\u003eOutput connection: 3.5mm headphone output\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: Wired headphones\u003c\/p\u003e\u003ch3\u003ePowered speaker or amplifier system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Digital source \/ Bluetooth device\u003cbr\u003eConnection: USB, optical, coaxial or Bluetooth\u003cbr\u003eOutput connection: RCA pre-output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Powered speakers or separate power amplifier\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs and outputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eInputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eUSB; optical; coaxial; Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eOutputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eRCA pre-output; 3.5mm headphone output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eChannels\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eTube complement\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e2 × 5654W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eDigital and headphone performance\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eMaximum resolution\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003ePCM 32-bit \/ 384kHz; DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eBluetooth\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e5.1; SBC, AAC, aptX, aptX HD, aptX LL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eHeadphone impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e32–300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eOutput power\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e300mW @ 16Ω; 250mW @ 32Ω; 50mW @ 250Ω; 40mW @ 300Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003e≥103dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top\"\u003ePower input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top\"\u003eDC 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:680px\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eGR40\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eGR70\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eK7\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eProduct position\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eTube DAC \/ headphone amp \/ preamp\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAnalog tube headphone amp \/ preamp\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBalanced digital DAC \/ headphone amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDigital inputs\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUSB, optical, coaxial, Bluetooth\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUSB, optical, coaxial, Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eHeadphone outputs\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm and 6.35mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm and 4.4mm balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eSpeaker-system output\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA pre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA pre-out\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eRCA line output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBest use\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDigital sources with tube stage\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAnalog tube headphone system\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eHigh-output HiFi and gaming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43673939738717,"sku":"Fosi-Audio-GR40-Black-US","price":137.42,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43673939771485,"sku":"Fosi-Audio-GR40-Black-EU","price":119.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43673939804253,"sku":"Fosi-Audio-GR40-Black-AU","price":119.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43673939837021,"sku":"Fosi-Audio-GR40-Black-UK","price":119.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_GR40.webp?v=1784631194"},{"product_id":"fosi-audio-bt30d","title":"Fosi Audio BT30D","description":"\u003cp\u003eFosi Audio BT30D is a compact 2.1-channel Bluetooth integrated amplifier for two passive speakers and a passive or powered subwoofer.\u003c\/p\u003e\u003cp\u003eDedicated subwoofer level and crossover controls make it a straightforward way to build an adjustable small-room, desktop or TV audio system.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eTrue 2.1-channel speaker control\u003c\/h3\u003e\u003cp\u003eSeparate stereo and subwoofer amplification supports passive speakers plus a passive subwoofer from one compact unit.\u003c\/p\u003e\u003ch3\u003ePassive and powered subwoofer flexibility\u003c\/h3\u003e\u003cp\u003eSpeaker-level subwoofer output and a line-level subwoofer connection support different bass-system configurations.\u003c\/p\u003e\u003ch3\u003eDedicated bass integration\u003c\/h3\u003e\u003cp\u003eSubwoofer volume and cutoff adjustment help blend low frequencies with the main speakers.\u003c\/p\u003e\n\u003ch3\u003eCompact analog control\u003c\/h3\u003e\u003cp\u003eMaster volume, bass, treble, subwoofer level and crossover adjustment are available directly from the front panel.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompact 2.1 passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eDesktop and small-room audio\u003c\/li\u003e\n\u003cli\u003eAdding an adjustable subwoofer to bookshelf speakers\u003c\/li\u003e\n\u003cli\u003eBluetooth or RCA playback\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystems requiring HDMI ARC or digital audio inputs\u003c\/li\u003e\n\u003cli\u003eUsers needing a headphone output\u003c\/li\u003e\n\u003cli\u003eLarge high-output home-theater systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThe main left\/right outputs are for passive speakers.\u003c\/li\u003e\n\u003cli\u003eUse the dedicated speaker output for a passive subwoofer or the line-level output for a powered subwoofer.\u003c\/li\u003e\n\u003cli\u003eIt has no phono stage; a turntable requires line output or an external phono preamplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media (max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important;margin-right:0!important}}.pbg__notes .emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0;\"\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioBT30D_002.webp?v=1758459884\" alt=\"Fosi Audio BT30D front and rear connection diagram\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioBT30D_005.webp?v=1758459884\" alt=\"Fosi Audio BT30D 2.1 audio system setup\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan it power a passive subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, through the dedicated subwoofer speaker output.\u003c\/p\u003e\u003ch3\u003eCan it connect to a powered subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, through its line-level subwoofer output.\u003c\/p\u003e\u003ch3\u003eCan it be used without a subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, it can operate as a 2.0-channel amplifier for passive speakers.\u003c\/p\u003e\u003ch3\u003eCan it connect to a TV?\u003c\/h3\u003e\u003cp\u003eYes when the TV provides compatible analog audio output; it has no HDMI or optical input.\u003c\/p\u003e\u003ch3\u003eCan it power active speakers?\u003c\/h3\u003e\u003cp\u003eThe main speaker outputs are amplified for passive speakers. A compatible line-level output should be used for powered equipment.\u003c\/p\u003e\u003ch3\u003eDoes it include Wi-Fi streaming?\u003c\/h3\u003e\u003cp\u003eNo. Wireless playback is through Bluetooth.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003ePassive 2.1 system\u003c\/h3\u003e\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ streamer\u003cbr\u003eConnection: Bluetooth or RCA\u003cbr\u003eOutput connection: L\/R speaker terminals + passive subwoofer terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Two passive speakers + passive subwoofer\u003c\/p\u003e\u003ch3\u003ePowered subwoofer system\u003c\/h3\u003e\u003cp\u003eSource icon: TV\u003cbr\u003eSource: TV analog output \/ DAC\u003cbr\u003eConnection: RCA\u003cbr\u003eOutput connection: L\/R speaker terminals + line-level sub output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers + powered subwoofer\u003c\/p\u003e\n\u003ch3\u003ePassive 2.0 stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: Left and right speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Two passive speakers\u003c\/p\u003e\u003cp\u003eNote: A subwoofer is optional; the BT30D can operate as a conventional stereo amplifier.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth 5.0\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eRCA line input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eOutputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eStereo passive-speaker output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003ePassive-subwoofer speaker output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eLine-level output for powered subwoofer\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eAmplifier Chipset\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2 × TI TPA3116D2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eMaximum Main Output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e50 W × 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eMaximum Subwoofer Output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e100 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSpeaker Impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2–8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSubwoofer Cutoff Adjustment\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e20–200 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and physical\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to 15 m \/ 49 ft without obstacles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e118 × 132 × 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSupplied Power Adapter\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e24 V \/ 4.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: BT30D or BT30D Pro?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:520px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT30D\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT30D Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAmplifier architecture\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e2 × TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMaximum output\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e50 W × 2 + 100 W\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e165 W × 2 + 350 W at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDC input range\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSupplied 24 V \/ 4.5 A\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e12–36 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBest use\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eCompact moderate-output 2.1\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHigher-output 2.1 systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43721622847581,"sku":"Fosi-Audio-BT30D-Black-US","price":98.17,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43721622880349,"sku":"Fosi-Audio-BT30D-Black-EU","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43721622913117,"sku":"Fosi-Audio-BT30D-Black-AU","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43721622945885,"sku":"Fosi-Audio-BT30D-Black-UK","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Silver \/ US","offer_id":43721622749277,"sku":"Fosi-Audio-BT30D-Silver-US","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Silver \/ EU","offer_id":43668425375837,"sku":"Fosi-Audio-BT30D-Silver-EU","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Silver \/ AU","offer_id":43721622782045,"sku":"Fosi-Audio-BT30D-Silver-AU","price":79.9,"currency_code":"USD","in_stock":true},{"title":"Silver \/ UK","offer_id":43721622814813,"sku":"Fosi-Audio-BT30D-Silver-UK","price":79.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT30D_9a060891-4269-4944-8d1c-384ac75e831d.webp?v=1785219705"},{"product_id":"fosi-audio-bt30d-pro","title":"Fosi Audio BT30D Pro","description":"\u003cp\u003eFosi Audio BT30D Pro is a TPA3255-based 2.1-channel Bluetooth integrated amplifier for passive stereo speakers and passive or powered subwoofers.\u003c\/p\u003e\u003cp\u003eHigh-output Class-D amplification, separate bass controls and flexible subwoofer connections make it a compact control center for a powerful 2.1 system.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eHigh-output 2.1 amplification\u003c\/h3\u003e\u003cp\u003eDedicated stereo and subwoofer channels provide up to 165 W × 2 plus 350 W maximum at 4 Ω.\u003c\/p\u003e\u003ch3\u003eFlexible subwoofer support\u003c\/h3\u003e\u003cp\u003eConnect a passive subwoofer from the amplified output or powered equipment from the 3.5 mm full-range line output.\u003c\/p\u003e\u003ch3\u003eIndependent system tuning\u003c\/h3\u003e\u003cp\u003eMaster volume, bass, treble, subwoofer volume and subwoofer frequency controls support practical room integration.\u003c\/p\u003e\u003ch3\u003eBluetooth and RCA inputs\u003c\/h3\u003e\u003cp\u003eWorks with wireless mobile sources or conventional analog line-level equipment.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHigher-output compact 2.1 systems\u003c\/li\u003e\n\u003cli\u003ePassive bookshelf or floor-standing speakers\u003c\/li\u003e\n\u003cli\u003ePassive or powered subwoofer integration\u003c\/li\u003e\n\u003cli\u003eDesktop, living-room and small TV systems with analog audio\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystems requiring HDMI ARC, optical or USB inputs\u003c\/li\u003e\n\u003cli\u003eUsers needing a headphone output\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThe advertised 165 W × 2 + 350 W figures are maximum ratings at 4 Ω and depend on the power supply and load.\u003c\/li\u003e\n\u003cli\u003eThe 3.5 mm output is full-range; powered subwoofers should use their own crossover where required.\u003c\/li\u003e\n\u003cli\u003eBluetooth has priority over RCA, so disconnect Bluetooth to return to the wired input.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media (max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important;margin-right:0!important}}.pbg__notes .emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0;\"\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT30D_PRO_002.webp?v=1758464320\" alt=\"Fosi Audio BT30D Pro 2.1 home audio system\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT30D_PRO_004.webp?v=1758464320\" alt=\"Fosi Audio BT30D Pro desktop integrated amplifier\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT30D_PRO_007.webp?v=1758464320\" alt=\"Fosi Audio BT30D Pro connection system diagram\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan it power passive speakers and a passive subwoofer?\u003c\/h3\u003e\u003cp\u003eYes. It provides amplified outputs for both.\u003c\/p\u003e\u003ch3\u003eCan it connect to a powered subwoofer?\u003c\/h3\u003e\u003cp\u003eYes, using the 3.5 mm full-range output and the powered subwoofer's compatible input.\u003c\/p\u003e\u003ch3\u003eCan it operate as a 2.0 amplifier?\u003c\/h3\u003e\u003cp\u003eYes. A subwoofer is optional.\u003c\/p\u003e\u003ch3\u003eDoes it support aptX?\u003c\/h3\u003e\u003cp\u003eNo. The official instructions state that aptX, aptX HD and aptX Low Latency are not supported.\u003c\/p\u003e\u003ch3\u003eCan it connect directly to a turntable?\u003c\/h3\u003e\u003cp\u003eOnly if the turntable provides line-level output; otherwise add a phono preamplifier.\u003c\/p\u003e\u003ch3\u003eCan it connect to a TV?\u003c\/h3\u003e\u003cp\u003eYes when the TV has compatible analog output. It does not have HDMI ARC or optical input.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eHigh-output passive 2.1 system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: Stereo speaker terminals + passive subwoofer terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers + passive subwoofer\u003c\/p\u003e\u003ch3\u003ePowered subwoofer system\u003c\/h3\u003e\u003cp\u003eSource icon: TV\u003cbr\u003eSource: TV analog output \/ DAC\u003cbr\u003eConnection: RCA\u003cbr\u003eOutput connection: Stereo speaker terminals + 3.5 mm full-range output\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers + powered subwoofer\u003c\/p\u003e\n\u003ch3\u003ePassive 2.0 stereo system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ phone\u003cbr\u003eConnection: RCA or Bluetooth\u003cbr\u003eOutput connection: Stereo speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Two passive speakers\u003c\/p\u003e\u003cp\u003eNote: A subwoofer is optional; leave the subwoofer outputs unused for a 2.0 system.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eInputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth 5.0\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eRCA line input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eOutputs\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eStereo passive-speaker output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003ePassive-subwoofer speaker output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003e3.5 mm full-range line output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eAmplifier Chip\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eTI TPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eMaximum Output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e165 W × 2 + 350 W at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSpeaker Impedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e2–8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eFrequency Response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e20 Hz–20 kHz (±1 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≤0.04%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e≥108 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eInput Sensitivity\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e700 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003ePassive Subwoofer Frequency Adjustment\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to 300 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and power\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eBluetooth Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003eup to 50 ft without obstacles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003eDC Input Range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003e12–36 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left;vertical-align:top;\"\u003ePower Adapter\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd;vertical-align:top;\"\u003edependent on selected variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: BT30D or BT30D Pro?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:520px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT30D\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eBT30D Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAmplifier architecture\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e2 × TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMaximum output\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e50 W × 2 + 100 W\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e165 W × 2 + 350 W at 4 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDC input range\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSupplied 24 V \/ 4.5 A\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e12–36 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBest use\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eCompact moderate-output 2.1\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHigher-output 2.1 systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"48V 5A \/ Black","offer_id":43672621744221,"sku":"Fosi-Audio-BT30D-Pro-48V-5A-Black","price":133.19,"currency_code":"USD","in_stock":true},{"title":"32V 5A \/ Black","offer_id":43672621776989,"sku":"Fosi-Audio-BT30D-Pro-32V-5A-Black","price":109.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_BT30D_Pro.webp?v=1784691027"},{"product_id":"fosi-audio-mc351","title":"Fosi Audio MC351","description":"\u003cp\u003eFosi Audio MC351 is a compact 2.1-channel integrated digital amplifier for passive stereo speakers and a passive subwoofer.\u003c\/p\u003e\u003cp\u003eDual TI TPA3255 amplifier chips, broad digital and analog inputs and up to 165W × 2 + 350W at 4Ω make it a practical control center for powerful 2.1 systems.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eDedicated 2.1 amplification\u003c\/h3\u003e\u003cp\u003eSeparate stereo and passive-subwoofer amplification builds a complete 2.1 system without a second power amp.\u003c\/p\u003e\u003ch3\u003eDual TPA3255 architecture\u003c\/h3\u003e\u003cp\u003eTwo TI TPA3255 amplifier chips provide high output for speakers and a passive subwoofer.\u003c\/p\u003e\u003ch3\u003eBroad source compatibility\u003c\/h3\u003e\u003cp\u003eBluetooth 5.3, USB, optical, coaxial and RCA inputs cover common music, computer and TV sources.\u003c\/p\u003e\u003ch3\u003eSystem expansion through pre-out\u003c\/h3\u003e\u003cp\u003eThe pre-out connection supports a powered subwoofer or compatible downstream equipment.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePassive bookshelf or floorstanding speaker systems\u003c\/li\u003e\n\u003cli\u003e2.1 systems using a passive subwoofer\u003c\/li\u003e\n\u003cli\u003eTV and desktop systems using optical, coaxial or USB audio\u003c\/li\u003e\n\u003cli\u003eUsers who need both wireless and wired source inputs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUsers needing HDMI ARC or TV-remote CEC control\u003c\/li\u003e\n\u003cli\u003eHeadphone-only systems\u003c\/li\u003e\n\u003cli\u003eTurntables without a built-in or external phono preamp\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"width:100%;max-width:1100px;margin:8px auto 32px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC351_005.webp?v=1758467891\" alt=\"Fosi Audio MC351 dual TPA3255 amplifier power and audio performance\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC351_006.webp?v=1758467891\" alt=\"Fosi Audio MC351 Bluetooth, USB, optical, coaxial and RCA inputs\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC351_007.webp?v=1758467891\" alt=\"Fosi Audio MC351 passive speaker and 2.1 subwoofer connection scenarios\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\n\u003c\/div\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMC351 directly powers passive speakers and a passive subwoofer; these are different from line-level active speakers.\u003c\/li\u003e\n\u003cli\u003eUSB is an audio-data input, not a power input.\u003c\/li\u003e\n\u003cli\u003eRCA is line level and does not replace a phono preamp for a standard turntable.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan MC351 drive passive speakers?\u003c\/h3\u003e\u003cp\u003eYes. It is designed for 4–8Ω passive speakers.\u003c\/p\u003e\u003ch3\u003eCan it power a passive subwoofer?\u003c\/h3\u003e\u003cp\u003eYes. It has a dedicated amplified passive-subwoofer output.\u003c\/p\u003e\u003ch3\u003eCan I connect a powered subwoofer?\u003c\/h3\u003e\u003cp\u003eYes. Use the line-level pre-out with a compatible powered subwoofer.\u003c\/p\u003e\u003ch3\u003eDoes it support HDMI ARC?\u003c\/h3\u003e\u003cp\u003eNo. Use optical, coaxial or RCA audio from a television.\u003c\/p\u003e\u003ch3\u003eWhat does the USB port do?\u003c\/h3\u003e\u003cp\u003eIt receives USB digital audio from a compatible computer or source; it does not power the amplifier.\u003c\/p\u003e\u003ch3\u003eCan I connect a turntable?\u003c\/h3\u003e\u003cp\u003eOnly if the turntable has a built-in phono preamp or you add an external phono preamp.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003e2.1 passive speaker system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Computer, streamer or TV\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e USB, optical, coaxial, RCA or Bluetooth\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals + passive-subwoofer output\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers + passive subwoofer\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Match speaker impedance and begin with low volume.\u003c\/p\u003e\u003ch3\u003eStereo speaker system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Any supported digital or analog source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Chosen input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Left\/right speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e 4–8Ω passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Leave the passive-subwoofer output unused for a 2.0 system.\u003c\/p\u003e\u003ch3\u003eSystem with powered subwoofer\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Any supported source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Chosen input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals + pre-out\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers + powered subwoofer\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Set crossover and level on the powered subwoofer.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eCore specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003e2.1-channel integrated digital amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier chips\u003c\/td\u003e\n\u003ctd\u003eTI TPA3255 × 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum output\u003c\/td\u003e\n\u003ctd\u003e165W × 2 + 350W at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker impedance\u003c\/td\u003e\n\u003ctd\u003e4–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD\u003c\/td\u003e\n\u003ctd\u003e≤0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSNR \/ Dynamic range\u003c\/td\u003e\n\u003ctd\u003e≥100dB \/ ≥100dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower input range\u003c\/td\u003e\n\u003ctd\u003eDC 24–48V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eInputs and outputs\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.3, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003ePassive speakers, passive subwoofer, pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB sampling\u003c\/td\u003e\n\u003ctd\u003eUp to 24-bit \/ 96kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical \/ coaxial sampling\u003c\/td\u003e\n\u003ctd\u003eUp to 32-bit \/ 192kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e20Hz–20kHz (±0.5dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer output range\u003c\/td\u003e\n\u003ctd\u003e20Hz–250Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.1 passive system\u003c\/td\u003e\n\u003ctd\u003eSource → MC351 → Passive speakers + passive subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTV system\u003c\/td\u003e\n\u003ctd\u003eTV optical output → MC351 → Passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowered sub expansion\u003c\/td\u003e\n\u003ctd\u003eSource → MC351 → Passive speakers + pre-out → Powered subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eFosi Audio product comparison\u003c\/h3\u003e\u003cp\u003eCompare the two compact Fosi Audio integrated amplifiers by their power, output structure and intended system layout.\u003c\/p\u003e\u003cdiv style=\"max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"min-width:760px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"min-width:150px;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eMC351\u003c\/th\u003e\n\u003cth style=\"min-width:190px;\"\u003eMC331\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct position\u003c\/th\u003e\n\u003ctd\u003eHigh-power 2.1 digital integrated amplifier\u003c\/td\u003e\n\u003ctd\u003eTube DAC \/ integrated stereo amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBuilt-in speaker amplifier\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum output\u003c\/th\u003e\n\u003ctd\u003e165W × 2 + 350W at 4Ω\u003c\/td\u003e\n\u003ctd\u003e105W × 2 at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMain inputs\u003c\/th\u003e\n\u003ctd\u003eBluetooth 5.3, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003ctd\u003eBluetooth, USB, optical, coaxial, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker output\u003c\/th\u003e\n\u003ctd\u003eStereo passive speakers\u003c\/td\u003e\n\u003ctd\u003eStereo passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePassive subwoofer output\u003c\/th\u003e\n\u003ctd\u003eYes, dedicated amplified output\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLine-level pre-out\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone output\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes, 3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube stage\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes, replaceable tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBest use\u003c\/th\u003e\n\u003ctd\u003ePowerful passive-speaker 2.1 system\u003c\/td\u003e\n\u003ctd\u003eCompact tube stereo and headphone system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ No Power Supply \/ US","offer_id":43722573774941,"sku":"Fosi-Audio-MC351-Black-No-Power-Supply-US","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ No Power Supply \/ EU","offer_id":43722573807709,"sku":"Fosi-Audio-MC351-Black-No-Power-Supply-EU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ No Power Supply \/ AU","offer_id":43722573840477,"sku":"Fosi-Audio-MC351-Black-No-Power-Supply-AU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ No Power Supply \/ UK","offer_id":43722573873245,"sku":"Fosi-Audio-MC351-Black-No-Power-Supply-UK","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 32V Power Supply \/ US","offer_id":43722573906013,"sku":"Fosi-Audio-MC351-Black-32V-Power-Supply-US","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 32V Power Supply \/ EU","offer_id":43722573938781,"sku":"Fosi-Audio-MC351-Black-32V-Power-Supply-EU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 32V Power Supply \/ AU","offer_id":43722573971549,"sku":"Fosi-Audio-MC351-Black-32V-Power-Supply-AU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 32V Power Supply \/ UK","offer_id":43722574004317,"sku":"Fosi-Audio-MC351-Black-32V-Power-Supply-UK","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 48V Power Supply \/ US","offer_id":43722574037085,"sku":"Fosi-Audio-MC351-Black-48V-Power-Supply-US","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 48V Power Supply \/ EU","offer_id":43722574069853,"sku":"Fosi-Audio-MC351-Black-48V-Power-Supply-EU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 48V Power Supply \/ AU","offer_id":43722574102621,"sku":"Fosi-Audio-MC351-Black-48V-Power-Supply-AU","price":169.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ 48V Power Supply \/ UK","offer_id":43722574135389,"sku":"Fosi-Audio-MC351-Black-48V-Power-Supply-UK","price":169.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC351_002.webp?v=1758467891"},{"product_id":"fosi-audio-mc101","title":"Fosi Audio MC101","description":"\u003cp\u003eFosi Audio MC101 is a compact Bluetooth stereo integrated amplifier for passive speakers, styled with an illuminated analog VU meter.\u003c\/p\u003e\u003cp\u003eBluetooth 5.3, RCA input, pre-out, tone controls and up to 100W per channel maximum output combine modern connectivity with tactile vintage-inspired control.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eIlluminated analog VU meter\u003c\/h3\u003e\u003cp\u003eThe moving pointer provides a distinctive visual indication that follows the audio signal.\u003c\/p\u003e\u003ch3\u003eBluetooth and RCA inputs\u003c\/h3\u003e\u003cp\u003eSwitch between Bluetooth 5.3 wireless playback and a conventional analog source.\u003c\/p\u003e\u003ch3\u003ePassive-speaker amplification\u003c\/h3\u003e\u003cp\u003eDual TPA3116 amplifiers provide up to 100W × 2 maximum at 4Ω.\u003c\/p\u003e\u003ch3\u003ePre-out system expansion\u003c\/h3\u003e\u003cp\u003eConnect compatible powered equipment or an additional amplifier from the line-level pre-output.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDesktop and bookshelf passive speakers\u003c\/li\u003e\n\u003cli\u003eSimple Bluetooth stereo systems\u003c\/li\u003e\n\u003cli\u003eUsers who value physical tone controls\u003c\/li\u003e\n\u003cli\u003eSystems needing a pre-output for expansion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHDMI ARC, optical or USB sources\u003c\/li\u003e\n\u003cli\u003eHeadphone listening\u003c\/li\u003e\n\u003cli\u003eTurntables without a phono preamplifier\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMC101 powers passive speakers; the pre-out is line level and should not be connected to passive speakers.\u003c\/li\u003e\n\u003cli\u003eThe 100W × 2 figure is a maximum specification at 4Ω and depends on power supply and load.\u003c\/li\u003e\n\u003cli\u003eA turntable needs a built-in or separate phono preamplifier before the RCA input.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media(max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0\"\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioMC101_001.webp?v=1758527245\" alt=\"Fosi Audio MC101 white background image\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioMC101_004.webp?v=1758527245\" alt=\"Dedicated to Vintage Lovers\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioMC101_006.webp?v=1758527245\" alt=\"Front and Rear Panel Overview\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eCan MC101 power passive speakers?\u003c\/h3\u003e\u003cp\u003eYes, through its rear speaker binding posts.\u003c\/p\u003e\u003ch3\u003eDoes it have a subwoofer output?\u003c\/h3\u003e\u003cp\u003eIt has a full-range pre-out; a powered subwoofer must provide a compatible input and crossover.\u003c\/p\u003e\u003ch3\u003eDoes it include a phono stage?\u003c\/h3\u003e\u003cp\u003eNo.\u003c\/p\u003e\u003ch3\u003eCan it connect to a TV?\u003c\/h3\u003e\u003cp\u003eOnly when the TV provides compatible analog output; there is no optical or HDMI input.\u003c\/p\u003e\u003ch3\u003eWhat Bluetooth codecs are supported?\u003c\/h3\u003e\u003cp\u003eSBC and AAC.\u003c\/p\u003e\u003ch3\u003eCan it drive headphones?\u003c\/h3\u003e\u003cp\u003eNo headphone output is provided.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eBluetooth stereo\u003c\/h3\u003e\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ tablet\u003cbr\u003eConnection: Bluetooth 5.3\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003ch3\u003eWired stereo\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Streamer \/ DAC \/ TV analog output\u003cbr\u003eConnection: RCA line input\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Passive speakers\u003c\/p\u003e\u003ch3\u003eExpanded system\u003c\/h3\u003e\u003cp\u003eSource icon: streamer\u003cbr\u003eSource: Bluetooth or RCA source\u003cbr\u003eConnection: Bluetooth or RCA\u003cbr\u003eOutput connection: Pre-out\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Powered subwoofer, powered speakers or downstream amplifier\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eConnections\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eInputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003eBluetooth 5.3; RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eOutputs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003eSpeaker binding posts; pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eBluetooth codecs\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003eSBC; AAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eBluetooth range\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e≥10m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAmplification\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eChannels\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eAmplifier chipset\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e2 × TI TPA3116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eMaximum output\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e100W × 2 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e≥100dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e≤0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e20Hz–20kHz (±1.8dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eDC input\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e12–24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSupplied adapter\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e24V \/ 4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:680px\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eMC101\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBT20A\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBT20A Pro\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAmplifier\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDual TPA3116\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDual TPA3116D2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eTPA3255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eMaximum stated output\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e100W × 2 @ 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e100W × 2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e300W × 2 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003ePre-out\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm variable pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eSignature feature\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eIlluminated VU meter\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eSimple compact stereo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eHigher output and op-amp rolling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBest use\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eVintage-style Bluetooth stereo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eEntry compact system\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eExpandable higher-output system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43722579312733,"sku":"Fosi-Audio-MC101-Black-US","price":58.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43722579345501,"sku":"Fosi-Audio-MC101-Black-EU","price":99.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43722579378269,"sku":"Fosi-Audio-MC101-Black-AU","price":99.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43722579411037,"sku":"Fosi-Audio-MC101-Black-UK","price":99.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_MC101_d7b0def0-0a5a-4002-859d-7fb670a5317d.webp?v=1785377215"},{"product_id":"fosi-audio-ht4s","title":"Fosi Audio HT4S","description":"\u003cp\u003eFosi Audio HT4S is a compact 4.1\/5.0-channel integrated amplifier for multi-speaker, outdoor-audio and simulator systems.\u003c\/p\u003e\n\u003cp\u003eBluetooth, optical and 3.5mm inputs, five amplified channels and a switchable sub\/center channel create a flexible multi-speaker system without a full-size AV receiver.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\n\u003ch3\u003eSwitchable 4.1 or 5.0 operation\u003c\/h3\u003e\n\u003cp\u003eConfigure four main speakers plus a subwoofer channel, or use five full-range speaker channels.\u003c\/p\u003e\n\u003ch3\u003eBuilt-in multi-channel power\u003c\/h3\u003e\n\u003cp\u003eProvides four 30W channels plus a 60W sub channel in 4.1 mode, or five 30W channels in 5.0 mode.\u003c\/p\u003e\n\u003ch3\u003eDigital and wireless inputs\u003c\/h3\u003e\n\u003cp\u003eConnect optical PCM, 3.5mm analog or Bluetooth sources.\u003c\/p\u003e\n\u003ch3\u003eRemote and front-panel control\u003c\/h3\u003e\n\u003cp\u003eAdjust source, volume, tone and operation without a separate controller.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor and patio multi-speaker systems\u003c\/li\u003e\n\u003cli\u003eSim-racing bass-shaker installations\u003c\/li\u003e\n\u003cli\u003eCompact 4.1 or 5.0 speaker systems\u003c\/li\u003e\n\u003cli\u003eTV systems with optical PCM output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDolby or DTS surround decoding\u003c\/li\u003e\n\u003cli\u003eSystems requiring HDMI ARC\u003c\/li\u003e\n\u003cli\u003eSpeakers below the specified 4Ω minimum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Product_Overview.webp?v=1790751838\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Key_Features.webp?v=1790751837\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-connectivity.webp?v=1790751836\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-Core_Technology.webp?v=1790751837\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S-World_Setup.webp?v=1790751838\" alt=\"\"\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHT4S is a multi-channel amplifier, not an HDMI adapter or surround-sound decoder.\u003c\/li\u003e\n\u003cli\u003eSet the source to PCM stereo when using optical; encoded Dolby\/DTS signals are not supported.\u003c\/li\u003e\n\u003cli\u003eThe SUB\/CEN output changes function with the selected mode, so confirm the switch setting before connecting speakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media(max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\n\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin: 32px 0;\"\u003e\n\u003cp style=\"margin: 24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudio-HT4S002.webp?v=1758599535\" alt=\"HT4S Multi-Channel Power Amplifier\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudio-HT4S003.webp?v=1758599535\" alt=\"A 5-Channel Patio Audio Solution\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 24px auto;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudio-HT4S005.webp?v=1758599535\" alt=\"Multi-Function Integrated Amplifier\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto;\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes HT4S have HDMI?\u003c\/h3\u003e\n\u003cp\u003eNo. Inputs are Bluetooth, optical and 3.5mm AUX.\u003c\/p\u003e\n\u003ch3\u003eDoes it decode Dolby or DTS?\u003c\/h3\u003e\n\u003cp\u003eNo. Use a compatible PCM signal.\u003c\/p\u003e\n\u003ch3\u003eCan it run five passive speakers?\u003c\/h3\u003e\n\u003cp\u003eYes, in 5.0 mode with compatible 4–8Ω speakers.\u003c\/p\u003e\n\u003ch3\u003eCan it power a passive subwoofer?\u003c\/h3\u003e\n\u003cp\u003eYes, in 4.1 mode through the dedicated amplified SUB\/CEN channel.\u003c\/p\u003e\n\u003ch3\u003eDoes it have a line output?\u003c\/h3\u003e\n\u003cp\u003eYes, a 3.5mm pre-out is provided.\u003c\/p\u003e\n\u003ch3\u003eCan it be used outdoors?\u003c\/h3\u003e\n\u003cp\u003eIt can power outdoor speakers, but the amplifier itself should remain protected indoors.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\n\u003ch3\u003eOptical TV system\u003c\/h3\u003e\n\u003cp\u003eSource icon: tv\u003cbr\u003eSource: TV \/ projector\u003cbr\u003eConnection: Optical PCM\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Four or five passive speakers\u003c\/p\u003e\n\u003ch3\u003eOutdoor multi-speaker system\u003c\/h3\u003e\n\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ streamer\u003cbr\u003eConnection: Bluetooth or AUX\u003cbr\u003eOutput connection: Speaker terminals\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Outdoor passive speakers\u003c\/p\u003e\n\u003ch3\u003eSim-racing system\u003c\/h3\u003e\n\u003cp\u003eSource icon: computer\u003cbr\u003eSource: PC \/ simulator audio\u003cbr\u003eConnection: Optical, AUX or Bluetooth\u003cbr\u003eOutput connection: Speaker and SUB\/CEN outputs\u003cbr\u003eTarget icon: speakers\u003cbr\u003eOutput: Speakers and compatible bass shaker \/ passive subwoofer\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cdiv style=\"width: 100%; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; table-layout: fixed;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 42%; padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eInputs\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003eBluetooth; optical; 3.5mm AUX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eOutputs\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003eFive speaker channels; 3.5mm pre-out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSpeaker impedance\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e4–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAmplification and physical\u003c\/h3\u003e\n\u003cdiv style=\"width: 100%; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; table-layout: fixed;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 42%; padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003e4.1 rated output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e30W × 4 + 60W × 1 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003e5.0 rated output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e30W × 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eMaximum output\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e50W × 5 @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eSNR\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e≥88dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eTHD\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e≤0.03%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eAC input\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e110–240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding: 11px; border: 1px solid #ddd; text-align: left;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding: 11px; border: 1px solid #ddd;\"\u003e6.1 × 7.2 × 2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\n\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 680px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eHT4S\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eBT30D\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eBT30D Pro\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eSystem type\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e4.1 \/ 5.0 multi-speaker\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e2.1 stereo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eHigher-output 2.1 stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eDigital input\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eOptical\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eAmplified outputs\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eUp to five channels\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eStereo + passive subwoofer\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eStereo + passive subwoofer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eMaximum stated output\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e50W × 5 @ 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e50W × 2 + 100W\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003e165W × 2 + 350W @ 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eBest use\u003c\/th\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eOutdoor, sim racing, multi-speaker\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eCompact moderate-output 2.1\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eHigher-output 2.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43722614079581,"sku":"Fosi-Audio-HT4S-Black-US","price":156.47,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43722614112349,"sku":"Fosi-Audio-HT4S-Black-EU","price":140.39,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43722614177885,"sku":"Fosi-Audio-HT4S-Black-UK","price":140.39,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43722614145117,"sku":"Fosi-Audio-HT4S-Black-AU","price":140.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_HT4S_8f975965-b39e-4a86-b4cb-185ee38f93c9.webp?v=1785223557"},{"product_id":"fosi-audio-t20","title":"Fosi Audio T20","description":"\u003cp\u003eFosi Audio T20 is a compact Bluetooth tube integrated amplifier for passive speakers and wired headphones.\u003c\/p\u003e\n\u003cp\u003eIt combines 50W x2 Class D speaker power with replaceable vacuum tubes, RCA input and tone controls for a warm, flexible desktop stereo system.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\n\u003cp\u003eFour reasons this product deserves a place in a well-planned audio system.\u003c\/p\u003e\n\u003ch3\u003eTube-Buffered Sound\u003c\/h3\u003e\n\u003cp\u003eReplaceable vacuum tubes add the tube stage and allow compatible tube rolling.\u003c\/p\u003e\n\u003ch3\u003eSpeaker and Headphone Listening\u003c\/h3\u003e\n\u003cp\u003eThe T20 powers passive speakers and also provides a front 3.5mm headphone output.\u003c\/p\u003e\n\u003ch3\u003eBluetooth and RCA Inputs\u003c\/h3\u003e\n\u003cp\u003eSwitch between convenient wireless playback and a conventional analog source.\u003c\/p\u003e\n\u003ch3\u003eCompact Tone Control\u003c\/h3\u003e\n\u003cp\u003eIndependent bass and treble controls make it easier to adapt the system to speakers, headphones and room acoustics.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesktop passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eBluetooth music playback\u003c\/li\u003e\n\u003cli\u003eHeadphone and speaker listening from one compact amplifier\u003c\/li\u003e\n\u003cli\u003eListeners interested in compatible tube rolling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUsers requiring optical, USB or HDMI inputs\u003c\/li\u003e\n\u003cli\u003eBalanced XLR audio systems\u003c\/li\u003e\n\u003cli\u003eTurntables without a built-in or external phono preamp\u003c\/li\u003e\n\u003cli\u003eUsers needing a dedicated subwoofer output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"emiuzek-product-content-images\" style=\"width: 100%; max-width: 1100px; margin: 8px auto 32px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20-Product_Overview.webp?v=1790751625\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20-Key_Features.webp?v=1790751624\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20-connectivity.webp?v=1790751624\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20-Core_Technology.webp?v=1790751624\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20X-World_Setup.webp?v=1790751625\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/O1CN01MCKB0l27FKzmXgbBE__2208567707767-0-cib.webp?v=1759027206\" alt=\"Fosi Audio T20 controls, connections and technical details\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi-Audio-T20-Bluetooth-Vacuum-Tube-Amplifier-AptX-HD-Stereo-Power-Amp-50W-TPA3116-Headphone-Amplifier_jpg__avif.webp?v=1766470699\" alt=\"Fosi Audio T20 Bluetooth tube amplifier interface\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/O1CN01pEjf4V27FKzoXZv6s__2208567707767-0-cib.webp?v=1759027206\" alt=\"Fosi Audio T20 integrated into a compact home audio system\" loading=\"lazy\" style=\"display: block; width: 100%; max-width: 1100px; height: auto; margin: 0 auto 24px;\"\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eT20 is an integrated speaker amplifier and can directly drive compatible 4–8Ω passive speakers.\u003c\/li\u003e\n\u003cli\u003eIts RCA input is line level; a conventional turntable requires a separate phono preamplifier.\u003c\/li\u003e\n\u003cli\u003eThe 3.5mm jack is a headphone output, not a microphone connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eCan the T20 drive passive speakers directly?\u003c\/h3\u003e\n\u003cp\u003eYes. Connect a compatible 4–8Ω passive speaker pair to the rear speaker terminals.\u003c\/p\u003e\n\u003ch3\u003eCan I connect a turntable?\u003c\/h3\u003e\n\u003cp\u003eYes only when the turntable has a built-in phono preamp or is used with an external phono preamp.\u003c\/p\u003e\n\u003ch3\u003eDoes it work as a headphone amplifier?\u003c\/h3\u003e\n\u003cp\u003eYes, it includes a front 3.5mm headphone output.\u003c\/p\u003e\n\u003ch3\u003eDoes it accept digital audio?\u003c\/h3\u003e\n\u003cp\u003eNo. Inputs are Bluetooth and analog RCA; optical and USB audio are not provided.\u003c\/p\u003e\n\u003ch3\u003eCan the tubes be replaced?\u003c\/h3\u003e\n\u003cp\u003eYes. Use only compatible tube types and power the unit off before replacement.\u003c\/p\u003e\n\u003ch3\u003eDoes it have a subwoofer output?\u003c\/h3\u003e\n\u003cp\u003eNo dedicated subwoofer output is specified. Use a subwoofer integration method supported by your wider system.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\n\u003ch3\u003eBluetooth speaker system\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Phone \/ tablet\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Pair the source and set volume low before playback.\u003c\/p\u003e\n\u003ch3\u003eWired stereo system\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e DAC \/ streamer \/ CD player\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e RCA line input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Use a fixed or controlled line-level source.\u003c\/p\u003e\n\u003ch3\u003eHeadphone listening\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Phone via Bluetooth or RCA source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth \/ RCA\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone output\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Wired headphones\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Lower volume before inserting headphones.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ch3\u003eAmplifier\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 680px; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBluetooth tube integrated amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eAmplifier Chip\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTI TPA3116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eMaximum Speaker Output\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e50W x2 at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eSpeaker Impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e4–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eConnectivity\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 680px; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eInputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBluetooth 5.0; RCA line input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eOutputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003ePassive speaker terminals; 3.5mm headphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTone Controls\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBass and treble\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAudio\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 680px; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eVacuum Tubes\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eReplaceable 6K4 pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e20Hz–20kHz (±1.5dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTHD\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e≤0.04%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eSNR\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e≥99dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 680px; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eSetup\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eWireless stereo\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003ePhone → Bluetooth → T20 → passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eWired stereo\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eStreamer\/DAC → RCA → T20 → passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eHeadphones\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eSource → T20 → 3.5mm headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 680px; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eT20\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eT20X\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 12px; border-bottom: 2px solid #222;\"\u003eP3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eProduct Position\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e50W x2 tube integrated amp\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e100W x2 tube integrated amp\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTube preamp \/ headphone amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003ePassive Speaker Amplifier\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eInputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBluetooth 5.0, RCA\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBluetooth, AUX\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBluetooth, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eSpeaker Output\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e50W x2 max at 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e100W x2 max at 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eHeadphone Output\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003e3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTone Controls\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBass, treble\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBass, treble\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBass, treble\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eTube Rolling\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eBest Use\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eCompact speaker\/headphone system\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eHigher-power speaker system\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #ddd; vertical-align: top;\"\u003eAdd tube preamp\/headphone stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43722623483997,"sku":"Fosi-Audio-T20-Black-US","price":99.37,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43722623516765,"sku":"Fosi-Audio-T20-Black-EU","price":89.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43722623549533,"sku":"Fosi-Audio-T20-Black-AU","price":89.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43722623582301,"sku":"Fosi-Audio-T20-Black-UK","price":89.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20_af0667e8-0225-42fe-aa14-9406dc6622f3.webp?v=1785381612"},{"product_id":"fosi-t20x","title":"Fosi Audio T20X","description":"\n\u003cp\u003eFosi Audio T20X is a Bluetooth vacuum-tube integrated amplifier for passive speakers and wired headphones.\u003c\/p\u003e\u003cp\u003eIts upgraded 100W x2 output, replaceable tubes and bass\/treble controls create a compact all-in-one amplifier for desktop and bookshelf systems.\u003c\/p\u003e\n\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003cp\u003eFour reasons this product deserves a place in a well-planned audio system.\u003c\/p\u003e\u003ch3\u003e100W x2 Maximum Output\u003c\/h3\u003e\u003cp\u003eThe Class D power stage provides more headroom than the T20 for compatible passive speakers.\u003c\/p\u003e\u003ch3\u003eReplaceable Tube Stage\u003c\/h3\u003e\u003cp\u003eTube rolling lets experienced users experiment with compatible tube options.\u003c\/p\u003e\u003ch3\u003eTwo Listening Outputs\u003c\/h3\u003e\u003cp\u003eDrive passive speakers or use the 3.5mm headphone connection from the same amplifier.\u003c\/p\u003e\u003ch3\u003eSimple Wireless and Analog Playback\u003c\/h3\u003e\u003cp\u003eBluetooth and analog input cover the most common phone, streamer and DAC setups without a complex interface.\u003c\/p\u003e\n\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBookshelf passive-speaker systems\u003c\/li\u003e\n\u003cli\u003eBluetooth desktop audio\u003c\/li\u003e\n\u003cli\u003eCombined speaker and headphone listening\u003c\/li\u003e\n\u003cli\u003eListeners wanting tube character with higher output than the T20\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUsers requiring optical, USB or HDMI audio\u003c\/li\u003e\n\u003cli\u003eBalanced XLR systems\u003c\/li\u003e\n\u003cli\u003eTurntables without phono amplification\u003c\/li\u003e\n\u003cli\u003eSystems needing a dedicated subwoofer output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"emiuzek-product-content-images\" style=\"width:100%;max-width:1100px;margin:8px auto 32px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/T20X001_8.webp?v=1758633206\" alt=\"Fosi Audio T20X Bluetooth 5.0 tube amplifier performance\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/T20X001_3.webp?v=1758633206\" alt=\"Fosi Audio T20X tube amplifier controls and connections\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/T20X001_6.webp?v=1758633206\" alt=\"Fosi Audio T20X in desktop and bookshelf audio scenarios\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto 24px;\"\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eT20X is an integrated amplifier and can directly drive compatible 2–8Ω passive speakers.\u003c\/li\u003e\n\u003cli\u003eIts analog input is line level; use a phono preamp with a conventional turntable.\u003c\/li\u003e\n\u003cli\u003eThe maximum output figure depends on speaker impedance, supply voltage and test conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eCan the T20X drive passive speakers?\u003c\/h3\u003e\u003cp\u003eYes. It is an integrated amplifier with passive-speaker outputs.\u003c\/p\u003e\u003ch3\u003eCan it connect to a turntable?\u003c\/h3\u003e\u003cp\u003eYes when the turntable has a built-in phono preamp or an external phono preamp is used.\u003c\/p\u003e\u003ch3\u003eDoes it include a headphone output?\u003c\/h3\u003e\u003cp\u003eYes, a 3.5mm wired headphone output is provided.\u003c\/p\u003e\u003ch3\u003eDoes it support optical or USB audio?\u003c\/h3\u003e\u003cp\u003eNo. Use Bluetooth or the analog input.\u003c\/p\u003e\u003ch3\u003eCan the vacuum tubes be replaced?\u003c\/h3\u003e\u003cp\u003eYes. Use compatible tubes and switch the amplifier off before tube replacement.\u003c\/p\u003e\u003ch3\u003eCan I connect an active subwoofer?\u003c\/h3\u003e\u003cp\u003eNo dedicated subwoofer output is specified; use a compatible system-level integration method.\u003c\/p\u003e\n\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003eBluetooth stereo\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Phone \/ tablet\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Keep initial volume low when pairing.\u003c\/p\u003e\u003ch3\u003eWired HiFi\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Streamer \/ DAC \/ CD player\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Analog line input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e Speaker terminals\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Passive speakers\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Use a line-level source.\u003c\/p\u003e\u003ch3\u003eHeadphone system\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSource:\u003c\/strong\u003e Bluetooth or analog source\u003cbr\u003e\u003cstrong\u003eConnection:\u003c\/strong\u003e Bluetooth \/ line input\u003cbr\u003e\u003cstrong\u003eOutput:\u003c\/strong\u003e 3.5mm headphone output\u003cbr\u003e\u003cstrong\u003eTarget:\u003c\/strong\u003e Wired headphones\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Disconnect or lower speaker listening as appropriate.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eAmplifier\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;min-width:680px;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBluetooth tube integrated amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eAmplifier Chip\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eTI TPA3221\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eMaximum Output\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e100W x2 at 4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eSpeaker Impedance\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e2–8Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eAudio\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;min-width:680px;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e20Hz–20kHz (±1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eTHD\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e≤0.3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eSNR\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e≥86dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e≤650mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConnectivity and Power\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;min-width:680px;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eInputs\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBluetooth; analog line input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eOutputs\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003ePassive speaker terminals; 3.5mm headphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e24V\/4.5A included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eDC Input Range\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e12–30V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eRecommended System Setup\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;min-width:680px;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eSetup\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eConnection\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eWireless speaker system\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003ePhone → Bluetooth → T20X → passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eWired stereo\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eStreamer\/DAC → line input → T20X → passive speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eHeadphones\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eSource → T20X → 3.5mm headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;\"\u003e\u003ctable style=\"width:100%;min-width:680px;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eT20X\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eT20\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:12px;border-bottom:2px solid #222;\"\u003eP3\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eProduct Position\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eHigher-power tube integrated amp\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eCompact tube integrated amp\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eTube preamp \/ headphone amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003ePassive Speaker Amplifier\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eMaximum Speaker Output\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e100W x2 at 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e50W x2 at 4Ω\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eInputs\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBluetooth, line input\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBluetooth 5.0, RCA\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBluetooth, RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eHeadphone Output\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003e3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eTone Controls\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBass, treble\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBass, treble\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBass, treble\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eTube Rolling\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eCompatible tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eBest Use\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eMore speaker headroom\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eCompact speaker system\u003c\/td\u003e\n\u003ctd style=\"padding:12px;border-bottom:1px solid #ddd;vertical-align:top;\"\u003eExisting amplifier \/ active speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Black \/ US","offer_id":43674008551517,"sku":"Fosi-Audio-T20X-Black-US","price":75.06,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43674008584285,"sku":"Fosi-Audio-T20X-Black-UK","price":99.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43674008617053,"sku":"Fosi-Audio-T20X-Black-EU","price":99.9,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43674008649821,"sku":"Fosi-Audio-T20X-Black-AU","price":99.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/Fosi_Audio_T20X_ea62dc10-377c-49da-8f44-897293c6b544.webp?v=1785381612"},{"product_id":"ampf2","title":"Eversolo AMP-F2: 2x250W Class-D Stereo Power Amplifier | Bridgeable 450W","description":"\u003ch1 data-path-to-node=\"10\"\u003e\u003cb\u003eEversolo AMP-F2: High-Power Class-D Stereo Amplifier\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp data-path-to-node=\"11\"\u003eThe Eversolo AMP-F2 is a high-performance stereo power amplifier designed to deliver immense power and pristine audio fidelity to even the most demanding loudspeaker systems. Built around the renowned \u003cb\u003ePurifi Eigentakt Class-D module\u003c\/b\u003e, the AMP-F2 ensures an extremely low noise floor, ultra-low distortion, and exceptional linearity across the entire frequency spectrum, offering a sound that is both powerful and transparent.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eHigh-Current Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Effortlessly drive a wide range of speakers, from bookshelf monitors to demanding floor-standing towers, with stable and dynamic power.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eUltra-Low Distortion (\u0026lt;0.03% THD):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Hear every detail as the artist intended. Our advanced circuitry ensures a clean, transparent signal from the softest whisper to the most explosive crescendo.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eWide Frequency Response (10Hz - 100kHz):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Reproduces the full spectrum of sound, capturing subtle harmonics and ultra-low bass that lesser amplifiers miss.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eAdvanced Protection Circuitry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Built-in safeguards against short circuits, over-current, over-temperature, and DC offset protect your valuable amplifier and speakers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eRCA \u0026amp; XLR Input Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Offers versatile connectivity for both consumer and professional audio sources, ensuring seamless integration into any system.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eSleek, Robust Chassis:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The durable metal construction not only looks premium but also effectively dissipates heat for optimal long-term performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eOutput Power\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003e200 Watts per channel @ 8Ω (RMS)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e350 Watts per channel @ 4Ω (RMS)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eTotal Harmonic Distortion (THD+N)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 0.03% (1kHz at rated power)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eFrequency Response\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10Hz - 100kHz (+1\/-3 dB)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eSignal-to-Noise Ratio (SNR)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026gt; 110 dB (A-weighted)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eInput Sensitivity\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0V (for RCA), 2.0V (for XLR)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eInput Impedance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e47 kΩ (RCA), 20 kΩ (XLR)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eDamping Factor\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026gt; 300 @ 8Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eInput Connectors\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 x Stereo RCA Pair, 1 x Stereo XLR Pair\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eSpeaker Terminals\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-quality 5-way Binding Posts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003ePower Supply\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eToroidal Transformer with Independent Regulation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eDimensions (W x H x D)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e17.3\" x 4.7\" x 15.7\" (440mm x 120mm x 400mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eNet Weight\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e28.6 lbs (13 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eWhy Choose the AMP-F2?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003ePure Audio Fidelity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e We prioritize sound quality above all, using premium components for a neutral and engaging listening experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eBuilt to Last:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The AMP-F2 is manufactured to the highest standards, ensuring reliability and performance for years to come.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eVersatile Application:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Perfect for stereo music systems, as a powerhouse for home theater front channels, or in professional audio setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eElevate your audio experience. Add the AMP-F2 Power Amplifier to your cart today.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"eversolo","offers":[{"title":"Black \/ US","offer_id":43722945036381,"sku":"eversolo-AMP-F2-2x250W-Class-D-Stereo-Power-Amplifier-Bridgeable-450W-Black-US","price":779.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ EU","offer_id":43722945069149,"sku":"eversolo-AMP-F2-2x250W-Class-D-Stereo-Power-Amplifier-Bridgeable-450W-Black-EU","price":779.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ AU","offer_id":43722945101917,"sku":"eversolo-AMP-F2-2x250W-Class-D-Stereo-Power-Amplifier-Bridgeable-450W-Black-AU","price":779.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ UK","offer_id":43722945134685,"sku":"eversolo-AMP-F2-2x250W-Class-D-Stereo-Power-Amplifier-Bridgeable-450W-Black-UK","price":779.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/PowerAmplifierAMP-F2_1.jpg?v=1758783493"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/collections\/Integrated_Amplifiers_23f08192-8c86-42f0-b656-deac4cbe95be.webp?v=1785553179","url":"https:\/\/emiuzek.com\/pt-br\/collections\/integrated-amplifier.oembed","provider":"EMiUZEK","version":"1.0","type":"link"}