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Fosi Audio P4 is a compact solid-state stereo preamplifier that brings three RCA sources under one volume and tone-control stage.Its motorized analog volume control, remote operation, three-level gain, tone bypass and separate pre-out make it a practical partner for power amplifiers and powered subwoofers.Why it stands outThree-source analog hubThree RCA inputs allow convenient switching among a DAC, streamer, CD player or other line-level source.Motorized analog volume controlThe remote-driven analog potentiometer provides smooth level adjustment without replacing the analog signal path with digital volume control.Flexible tone and gain adjustmentBass, treble, bypass and three gain levels help match different source levels and listening preferences.Low-noise preamplifier performanceHigh SNR and low THD+N support clean system control in a compact all-metal chassis.Best for Systems with multiple line-level analog sources Power amplifiers needing source selection and remote volume Powered speaker systems 2.1 systems using the volume-controlled pre-out Not ideal for Driving passive speakers directly Turntables without a built-in or external phono preamp Users needing Bluetooth or digital audio inputs EMiUZEK Buying Notes P4 is a preamplifier and cannot directly power passive speakers. All three inputs are line-level RCA; a standard turntable requires a phono preamp. Pre-out is volume controlled and suitable for compatible powered subwoofers or powered speakers. Frequently asked questionsCan P4 drive passive speakers?No. Connect its RCA output to a power amplifier that drives the passive speakers.Does P4 include Bluetooth?No. It is an analog RCA preamplifier.Can I connect a turntable?Only if the turntable has a built-in phono stage or you use an external phono preamp.What is pre-out for?It provides a volume-controlled line-level output for compatible powered speakers, a powered subwoofer or downstream equipment.Can tone controls be bypassed?Yes. The bypass function provides a more direct signal path when tone adjustment is not needed.What does the gain setting do?The three gain levels help match differing source output levels and system sensitivity.HOW TO CONNECTPower amplifier systemSource: DAC, streamer, CD player or phono preampConnection: RCA inputOutput: RCA outputTarget: Power amplifier → passive speakersNote: Select the source and use P4 for volume control.Powered speaker systemSource: Up to three line-level sourcesConnection: RCA inputOutput: Pre-out or RCA outputTarget: Powered speakersNote: Begin with conservative volume settings on both devices.2.1 systemSource: Line-level sourceConnection: RCA inputOutput: RCA output + pre-outTarget: Power amplifier and powered subwooferNote: Use pre-out for the powered subwoofer and confirm crossover settings.Technical SpecificationsAudio performance Feature Specification Product type 2.0-channel solid-state preamplifier SNR ≥110dB Dynamic range ≥110dB THD+N ≤0.003% Crosstalk ≥105dB Noise floor ≤9μV Frequency response 20Hz–20kHz (±0.1dB) Tone adjustment ±12dB Connectivity and power Feature Specification Inputs RCA × 3 Outputs RCA, pre-out Gain adjustment +3dB / +6dB / +9dB Volume control Motorized analog potentiometer with remote Power supply DC 12V / 1.5A Recommended System Setup Setup Connection Stereo separates Sources → P4 → Power amplifier → Passive speakers Powered speakers Sources → P4 → Powered speakers 2.1 separates Sources → P4 → Power amplifier + powered subwoofer Additional Product ContentFosi Audio product comparisonCompare the main Fosi Audio preamplifier choices by source support, outputs and the features that most affect system design. Feature P4 P3 ZP3 Product position Compact analog preamp Tube preamp + headphone amp Balanced high-performance preamp Analog inputs RCA × 3 RCA RCA × 2, XLR Wireless / digital inputs None Bluetooth 5.1 None Main outputs RCA, pre-out RCA, AUX RCA, XLR, sub-out Headphone output No 3.5mm No Speaker amplification No No No Tube stage No Yes, replaceable 5654W No Tone controls Bass and treble with bypass Bass and treble Bass and treble Remote control Yes No Yes THD+N ≤0.003% ≤0.02% ≤0.0007% SNR ≥110dB ≥103dB ≥115dB Best use Three analog sources and powered sub expansion Bluetooth tube preamp and headphones Balanced stereo system integration

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Questyle CMA Eighteen Master is a flagship desktop DAC, preamplifier and headphone amplifier designed as the control centre of a reference headphone or HiFi system.Its fully balanced Current Mode architecture, extensive digital and analogue connectivity, and powerful balanced headphone stage combine source control and high-end listening in one chassis. Why it stands outFlagship desktop integrationCombines digital decoding, analogue preamplification and headphone amplification in one reference-class component.Full-chain Current Mode designQuestyle’s Current Mode signal path is engineered for wide bandwidth, low distortion and precise transient response.Balanced system architectureBalanced headphone and line connections support demanding headphones and high-quality downstream systems.Flexible source controlMultiple digital and analogue inputs make it suitable for computers, transports and existing HiFi sources. Best for Reference desktop headphone systems High-end DAC and preamplifier upgrades Balanced headphones and active monitor systems Multi-source desktop or living-room HiFi systems Not ideal for Portable or battery-powered listening Directly driving passive loudspeakers Users who only need a simple USB dongle EMiUZEK Buying Notes This is the desktop CMA Eighteen Master, not the battery-powered CMA18 Portable. It is a DAC, preamplifier and headphone amplifier; it does not contain a loudspeaker power amplifier. Connect passive speakers through a separate power amplifier or integrated amplifier. Frequently asked questionsCan it drive passive speakers directly?No. Use its line output with an external power amplifier or active speakers.Can it be used as a preamplifier?Yes, connect its line output to a compatible power amplifier or active monitors.Can I connect a computer?Yes, use the appropriate digital input and install the official driver where required.Does it support balanced headphones?Yes, it provides balanced headphone connectivity as well as single-ended headphone use.Is this the CMA18 Portable?No. This listing is for the full-size desktop CMA Eighteen Master. HOW TO CONNECTDesktop Headphone SystemSource: PC / MacConnection: USB audioOutput: Balanced or single-ended headphone outputTarget: Wired headphonesActive Speaker SystemSource: Digital or analogue sourceConnection: Compatible inputOutput: Line / preamplifier outputTarget: Active speakersHiFi Preamp SystemSource: Streamer / CD transportConnection: Digital inputOutput: Balanced or RCA line outputTarget: Power amplifier and passive speakers Technical Specifications Feature Specification Product type Desktop DAC / preamplifier / headphone amplifier Architecture Fully balanced full-chain Current Mode design Digital sources Computer, digital transport and compatible digital audio sources Analogue input Line-level analogue input Headphone outputs Balanced and single-ended Line outputs Balanced and unbalanced Speaker amplification Not built in Power AC-powered desktop component What's in the box Questyle CMA Eighteen Master Power cable Remote control Product documentation Download CenterAccess product manuals, firmware updates, and additional support resources.Download CenterAdditional Product Content📊 Comparison: Which Flagship Desktop DAC/Amp Is Right for You?Choose CMA Eighteen Master for Current Mode sound, extensive source flexibility and a flagship all-in-one system; choose RME for deep DSP control, or FiiO K19 when HDMI ARC and very high headphone power are priorities. Feature Questyle CMA Eighteen Master RME ADI-2 DAC FS FiiO K19 Core buying reason Flagship Current Mode desktop system Reference DAC with powerful DSP High-power desktop DAC/amp with HDMI DAC architecture ESS ES9038PRO RME reference conversion platform Dual ESS ES9039SPRO Maximum USB playback PCM 768kHz / DSD512 PCM 768kHz / DSD PCM 768kHz / DSD512 Headphone connection 4.4mm balanced and 6.35mm 6.35mm plus dedicated IEM output 4.4mm, 6.35mm and 4-pin XLR Analogue input Included for multi-source integration Not on ADI-2 DAC FS Not the main use case DSP / EQ focus Sound-path and hardware focused Extensive PEQ, loudness and crossfeed App and onboard DSP features HDMI ARC No No Yes Best choice when You want Questyle Current Mode sound and a flagship preamp/headphone hub You need precise headphone correction and measurement-style control You need HDMI, Bluetooth and maximum connection flexibility

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Fosi Audio T20X is a Bluetooth vacuum-tube integrated amplifier for passive speakers and wired headphones.Its upgraded 100W x2 output, replaceable tubes and bass/treble controls create a compact all-in-one amplifier for desktop and bookshelf systems. Why it stands outFour reasons this product deserves a place in a well-planned audio system.100W x2 Maximum OutputThe Class D power stage provides more headroom than the T20 for compatible passive speakers.Replaceable Tube StageTube rolling lets experienced users experiment with compatible tube options.Two Listening OutputsDrive passive speakers or use the 3.5mm headphone connection from the same amplifier.Simple Wireless and Analog PlaybackBluetooth and analog input cover the most common phone, streamer and DAC setups without a complex interface. Best for Bookshelf passive-speaker systems Bluetooth desktop audio Combined speaker and headphone listening Listeners wanting tube character with higher output than the T20 Not ideal for Users requiring optical, USB or HDMI audio Balanced XLR systems Turntables without phono amplification Systems needing a dedicated subwoofer output EMiUZEK Buying Notes T20X is an integrated amplifier and can directly drive compatible 2–8Ω passive speakers. Its analog input is line level; use a phono preamp with a conventional turntable. The maximum output figure depends on speaker impedance, supply voltage and test conditions. Frequently Asked QuestionsCan the T20X drive passive speakers?Yes. It is an integrated amplifier with passive-speaker outputs.Can it connect to a turntable?Yes when the turntable has a built-in phono preamp or an external phono preamp is used.Does it include a headphone output?Yes, a 3.5mm wired headphone output is provided.Does it support optical or USB audio?No. Use Bluetooth or the analog input.Can the vacuum tubes be replaced?Yes. Use compatible tubes and switch the amplifier off before tube replacement.Can I connect an active subwoofer?No dedicated subwoofer output is specified; use a compatible system-level integration method. HOW TO CONNECTBluetooth stereoSource: Phone / tabletConnection: BluetoothOutput: Speaker terminalsTarget: Passive speakersNote: Keep initial volume low when pairing.Wired HiFiSource: Streamer / DAC / CD playerConnection: Analog line inputOutput: Speaker terminalsTarget: Passive speakersNote: Use a line-level source.Headphone systemSource: Bluetooth or analog sourceConnection: Bluetooth / line inputOutput: 3.5mm headphone outputTarget: Wired headphonesNote: Disconnect or lower speaker listening as appropriate. Technical SpecificationsAmplifier Feature Specification Product Type Bluetooth tube integrated amplifier Amplifier Chip TI TPA3221 Maximum Output 100W x2 at 4Ω Speaker Impedance 2–8Ω Audio Feature Specification Frequency Response 20Hz–20kHz (±1dB) THD ≤0.3% SNR ≥86dB Input Sensitivity ≤650mV Connectivity and Power Feature Specification Inputs Bluetooth; analog line input Outputs Passive speaker terminals; 3.5mm headphone Power Supply 24V/4.5A included DC Input Range 12–30V Recommended System Setup Setup Connection Wireless speaker system Phone → Bluetooth → T20X → passive speakers Wired stereo Streamer/DAC → line input → T20X → passive speakers Headphones Source → T20X → 3.5mm headphones Additional Product Content Feature T20X T20 P3 Product Position Higher-power tube integrated amp Compact tube integrated amp Tube preamp / headphone amp Passive Speaker Amplifier Yes Yes No Maximum Speaker Output 100W x2 at 4Ω 50W x2 at 4Ω Not applicable Inputs Bluetooth, line input Bluetooth 5.0, RCA Bluetooth, RCA Headphone Output 3.5mm 3.5mm 3.5mm Tone Controls Bass, treble Bass, treble Bass, treble Tube Rolling Compatible tubes Compatible tubes Compatible tubes Best Use More speaker headroom Compact speaker system Existing amplifier / active speakers

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Fosi Audio SP601 is a pair of 6.5-inch passive bookshelf speakers designed for stereo music and home entertainment systems.A silk-dome tweeter, HybridCone composite woofer and 80W RMS power handling provide a balanced upgrade for compact HiFi installations. Why it stands outFour reasons this product deserves a place in a well-planned audio system.Two-Way Driver DesignA 1.5-inch silk-dome tweeter and 6.5-inch composite woofer divide high and low frequencies for clearer stereo reproduction.80W RMS Power HandlingThe pair is rated for 80W RMS and 160W peak power, supporting capable integrated amplifiers without requiring oversized cabinets.Flexible Speaker PlacementFront-facing drivers and tuned bass-reflex construction suit stands, shelves and media-room layouts.Standard Passive IntegrationDual-mode binding posts support common speaker-cable terminations and make the SP601 easy to integrate with a stereo amplifier. Best for Compact stereo music systems Bookshelf or speaker-stand installations TV and home entertainment systems with an external amplifier Listeners upgrading from small entry-level passive speakers Not ideal for Users who need powered speakers with built-in amplification Wireless-only systems without a speaker amplifier Very large rooms requiring high-output floorstanding speakers EMiUZEK Buying Notes SP601 is a passive speaker pair and must be connected to a compatible stereo amplifier. Match the amplifier and listening level to the speakers' 4Ω nominal impedance and 80W RMS rating. Speaker cable is required between the amplifier and each speaker. Frequently Asked QuestionsDo the SP601 speakers include an amplifier?No. They are passive speakers and require an external power or integrated amplifier.What amplifier impedance support is required?Use an amplifier rated to operate safely with 4Ω speakers.Can they connect directly to a television?Only if the television feeds a compatible external amplifier; the speakers cannot accept a TV signal directly.Can I use banana plugs?The dual-mode binding posts are designed for common speaker-cable terminations, including compatible banana plugs.Are they sold as a pair?Yes, the SP601 is supplied as a stereo speaker pair.Do they support Bluetooth or Wi-Fi?Not by themselves. Add a Bluetooth receiver or network streamer through the amplifier if wireless playback is required. HOW TO CONNECTStereo HiFi systemSource: DAC, streamer or CD playerConnection: RCA / digital connection to amplifierOutput: Speaker cableTarget: Stereo amplifier → SP601 pairNote: Observe left/right speaker polarity.TV audio systemSource: TelevisionConnection: HDMI ARC / optical to compatible amplifierOutput: Speaker cableTarget: Amplifier → SP601 pairNote: The amplifier must decode the TV audio signal.Desktop systemSource: Computer / USB DACConnection: Line-level audio to amplifierOutput: Speaker cableTarget: Compact amplifier → SP601 pairNote: Place both speakers at similar height and distance. Technical SpecificationsSpeaker Feature Specification Product Type Two-way passive bookshelf speaker Tweeter 1.5-inch silk dome Woofer 6.5-inch HybridCone composite Nominal Impedance 4Ω Sensitivity 86dB Power Feature Specification RMS Power Handling 80W Peak Power Handling 160W Amplification External amplifier required Connections Feature Specification Speaker Terminals Dual-mode binding posts Wireless Connectivity None Recommended System Setup Setup Connection Stereo music Source → amplifier → SP601 pair TV system TV → AV/stereo amplifier → SP601 pair Desktop HiFi Computer/DAC → compact amplifier → SP601 pair Additional Product ContentNo like-for-like comparison is included because this model has a distinct product role.

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Dual CS 518 is a manual belt-drive turntable built around Dual's twin-gimbal precision tonearm. It retains the Ortofon 2M Red and switchable MM phono stage of the CS 418 while upgrading the arm platform for more demanding cartridge use.Why it stands outTwin-gimbal tonearmFour fine pivot ball bearings guide the cartridge with greater bearing sophistication than the CS 418.Ready-to-play cartridgeThe factory-installed Ortofon 2M Red offers balanced performance and a replaceable stylus.Flexible phono integrationA switchable MM stage allows direct line-level connection or use of a dedicated external phono stage.Manual three-speed controlElectronic 33, 45 and 78 RPM selection supports varied record collections with the correct stylus.Best for Vinyl enthusiasts prioritizing tonearm quality Manual listening rituals Cartridge-upgrade paths Systems with either line or MM phono inputs Not ideal for Automatic start or return Bluetooth-only playback systems Buyers who do not want initial tonearm setup Product Details and Setup ViewsEMiUZEK Buying Notes The key upgrade over CS 418 is the twin-gimbal, four-bearing tonearm; general drive and cartridge specifications are otherwise similar. Use a dedicated 78 RPM stylus or cartridge for shellac records. Select LINE only for line-level inputs; bypass the internal stage for a true MM PHONO input. Frequently asked questionsIs the CS 518 automatic?No. It is a fully manual turntable.How does it differ from CS 418?Its principal upgrade is the twin-gimbal tonearm with four pivot ball bearings.Which cartridge is included?An Ortofon 2M Red.Is a phono preamp built in?Yes. The MM stage is switchable.Can it play 78 RPM records?Yes, when fitted with a suitable 78 RPM stylus or cartridge.Can I upgrade the cartridge?Yes. It supports compatible 5–9 g cartridges and has a removable headshell.HOW TO CONNECTPowered speakersSource: RecordConnection: Internal phono stage set to LINEOutput connection: RCA cable to analog speaker inputIntegrated amplifierSource: RecordConnection: Internal phono stage set to LINEOutput connection: RCA cable to AUX/CD inputExternal phono systemSource: RecordConnection: Internal phono stage bypassedOutput connection: RCA to MM phono stage, then amplifierTechnical Specifications Feature Specification Operation Manual Drive DC motor, belt drive Speeds 33 / 45 / 78 RPM Wow and flutter < ±0.1% (DIN rated) Cartridge Ortofon 2M Red Tonearm Twin-gimbal aluminium; four pivot ball bearings Tracking range 0–4 g; compatible cartridge mass 5–9 g Platter 305 mm die-cast aluminium; 850 g including mat Output RCA sockets; switchable phono/line Dimensions / weight 435 × 367 × 145 mm; 5.8 kg Additional Product ContentComparison: Dual CS 518 vs Dual CS 418 vs Dual CS 618QUse the differences below to choose by operation style, drive system and upgrade priorities. Feature Dual CS 518 Dual CS 418 Dual CS 618Q Operation Manual Manual Manual with auto lift/stop Drive Belt Belt Quartz direct drive Tonearm Twin-gimbal, four bearings Ball-bearing Twin-gimbal, four bearings Cartridge Ortofon 2M Red Ortofon 2M Red Ortofon 2M Blue Best reason to choose Upgraded arm at midrange price Lower-cost entry Direct drive and end-of-side protection

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Dual CS 329 is a fully automatic, plug-and-play belt-drive turntable for uncomplicated vinyl listening. Factory-set operation, a switchable MM phono stage and an Audio-Technica AT91 cartridge make it easy to connect and use.Why it stands outTrue one-button playbackThe tonearm starts, lowers, lifts and returns automatically, while manual cueing remains available.Factory-set simplicityTracking force and cartridge setup are fixed at the factory to reduce first-time setup errors.Flexible amplifier matchingThe switchable phono preamp works with either a PHONO input or a standard line/AUX input.Resonance-aware constructionAn aluminium platter, rubber mat and elastomer-damped feet support stable everyday playback.Best for First-time vinyl listeners Simple living-room systems Powered speakers with an analog input Amplifiers with or without a PHONO input Not ideal for Cartridge-tuning enthusiasts 78 RPM records Listeners requiring Bluetooth or USB audio Product Details and Setup ViewsEMiUZEK Buying Notes Use PHONO mode only with an amplifier's PHONO input; use LINE mode with AUX, CD or powered speakers. The factory-set tracking force is not intended for broad cartridge swapping. This model plays 33 and 45 RPM records only. Frequently asked questionsIs it fully automatic?Yes. Start, cueing, end-of-record lift and return can operate automatically.Does it have a phono preamp?Yes. The built-in MM stage is switchable for PHONO or LINE connection.Which cartridge is installed?Dual specifies an Audio-Technica AT91 cartridge.Can I operate it manually?Yes. Manual playback is possible in addition to automatic operation.Does it play 78 RPM records?No. It supports 33 and 45 RPM.Can it connect directly to powered speakers?Yes, when the speakers have an analog line input and the turntable is set to LINE.HOW TO CONNECTPowered speakersSource: RecordConnection: Built-in phono preamp set to LINEOutput connection: Fixed RCA cable to powered speakersAmplifier with AUX inputSource: RecordConnection: Built-in phono preamp set to LINEOutput connection: Fixed RCA cable to AUX/LINE inputAmplifier with PHONO inputSource: RecordConnection: Phono preamp set to PHONO/bypassOutput connection: Fixed RCA cable to MM PHONO inputTechnical Specifications Feature Specification Operation Fully automatic or manual Drive DC motor, belt drive Speeds 33 / 45 RPM Wow and flutter < ±0.12% (JIS weighted) Cartridge Audio-Technica AT91 Tonearm Straight aluminium; ball-bearing; fixed stylus pressure Platter 297 mm die-cast aluminium; 667 g including mat Output Fixed RCA cable; switchable phono/line Dimensions 435 × 372 × 132 mm with dust cover closed Weight 5.0 kg Additional Product ContentComparison: Dual CS 329 vs Dual CS 429 vs Dual CS 418Use the differences below to choose by operation style, drive system and upgrade priorities. Feature Dual CS 329 Dual CS 429 Dual CS 418 Operation Fully automatic; factory-set Fully automatic; adjustable Manual Speeds 33/45 33/45/78 33/45/78 Cartridge Audio-Technica AT91 Ortofon 2M Red Ortofon 2M Red Tonearm setup Fixed Adjustable force and antiskating Adjustable force and antiskating Best reason to choose Maximum simplicity Automatic use with upgrade scope Lower-cost manual control

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FiiO BR13 Hi-Res Bluetooth Receiver & DAC Breathe new life into your audio system. The FiiO BR13 is the ultimate solution for upgrading your traditional wired speakers, amplifiers, or older home theater systems. By adding high-resolution wireless connectivity, the BR13 allows you to stream music from your phone or tablet to your premium speakers with uncompromising quality. It is more than just a receiver; it is a dedicated audio processing center for your home. High-End Wireless Architecture Qualcomm QCC5125 & LDAC Support Wireless doesn't mean low quality. The BR13 is powered by the Qualcomm QCC5125 Bluetooth 5.1 chip, supporting all major high-resolution codecs including LDAC, aptX HD, and aptX Adaptive. This ensures stable, low-latency transmission with sound quality that rivals wired connections. Dedicated ES9018K2M DAC Unlike cheap adapters that use integrated Bluetooth DACs, the BR13 features a dedicated ESS ES9018K2M DAC chip. Coupled with the TPA1882 operational amplifier, it delivers a clean, dynamic analog signal with low noise, ensuring your Hi-Fi system performs at its best. Visual Control & Exclusive Tech High-Contrast VA Display Stop guessing your connection status. The BR13 features a rare-in-class VA display screen. See exactly which codec (e.g., LDAC) is active, the current sampling rate, and EQ settings at a glance. Global Upsampling Technology Experience enhanced clarity. The BR13 features FiiO’s proprietary Global Upsampling technology. It can automatically upsample low-resolution audio signals to 96kHz/24bit, restoring detail and airiness to your music before outputting it to your system. 3-in-1 Versatility The BR13 handles more than just Bluetooth. It supports three distinct modes: Bluetooth Receiver (RX): Stream from phone to speakers. USB DAC: Connect to a computer via USB-C to act as an external sound card. SPDIF Conversion: Connect a TV or CD player via Optical/Coaxial Input, and output to analog speakers (DAC mode) or bypass to digital outputs. Technical Specifications Feature Detailed Specification Bluetooth Chip Qualcomm QCC5125 (Bluetooth 5.1) DAC Chipset ESS ES9018K2M Op-Amp TPA1882 Supported Codecs LDAC, aptX HD, aptX Adaptive, aptX, AAC, SBC Inputs Bluetooth, USB-C, Optical In, Coaxial In Outputs RCA Line-Out, Optical Out, Coaxial Out Display Custom VA Screen Upsampling Up to 96kHz/24bit Power Input USB-C (5V) Why Choose the FiiO BR13? 7 Preset EQs: Choose from Pop, Classical, Jazz, and more, or customize your own parametric EQ (PEQ) via the FiiO Control App. Game Mode: Supports aptX Low Latency (LL) and a dedicated low-latency mode in the app, making it great for gaming setups. Dual-Device Connection: Can connect to two Bluetooth devices simultaneously, allowing you to switch playback between your phone and tablet seamlessly. Aluminum Build: Features a compact, durable aluminum alloy body with an angled front panel for easy viewing on a desktop. Frequently Asked Questions Does the BR13 transmit Bluetooth (TX)? No. The BR13 is a Receiver (RX) only. It receives audio from your phone and plays it through wired speakers. It cannot transmit audio from a TV to Bluetooth headphones (for that, you need the FiiO BTA30 Pro). Can I connect it to my active speakers? Yes. Use the RCA Line-Out ports on the back of the BR13 to connect directly to your active speakers (like FiiO SP3 or Audioengine). Does it need a driver for PC use? For USB DAC mode, it supports UAC 1.0, which is plug-and-play for Windows, Mac, PS5, and Switch. No complex driver installation is required.   Need Multi-Room Audio? If you prefer Wi-Fi streaming over Bluetooth, check out the WiiM Mini Streamer for AirPlay 2 and Spotify Connect support.

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✨ EMiUZEK AMP D60: Multiroom Wireless Stereo Streaming Amplifier Board The EMiUZEK AMP D60 board is a versatile and powerful solution designed to transform any traditional speaker setup into a modern, wireless streaming audio system. It serves as the core component for DIY enthusiasts looking to build custom speakers or integrate multiroom capabilities into their existing passive speaker infrastructure. Key Features: Seamless Multiroom Streaming: Easily connect multiple devices across your home to play synchronizedWhy it stands outAudio resolutionHigh-Fidelity Stereo Output: Delivers clean, robust stereo sound, ensuring an excellent listening experience whether you are streaming high-resolution audio or popular music services.BluetoothWireless Connectivity: Features both WiFi (2.4G) and Bluetooth 5.3 connectivity, giving you flexible options for local and network streaming.Wi-Fi and streaming✨ EMiUZEK AMP D60: Multiroom Wireless Stereo Streaming Amplifier Board The EMiUZEK AMP D60 board is a versatile and powerful solution designed to transform any traditional speaker setup into a modern, wireless streaming audio system. Key Features: Seamless Multiroom Streaming: Easily connect multiple devices across your home to play synchronized audio or different music in different rooms, all controlled via a single app.Multi-roomIt serves as the core component for DIY enthusiasts looking to build custom speakers or integrate multiroom capabilities into their existing passive speaker infrastructure. Intuitive App Control: Manage your entire multiroom setup, select music sources, and adjust volume and EQ settings all through a user-friendly mobile application.Best for Custom audio builds OEM prototypes Upgrading an existing enclosure Users comfortable with wiring and integration Not ideal for Plug-and-play retail systems Installers without voltage and pinout experience Projects needing undocumented interfaces Product Details and Connection ViewsEMiUZEK Buying Notes This is a DIY module; verify supply voltage, pinout, grounding and enclosure clearances before power-up. Bundle contents differ by variant; accessories are included only when named in the selected bundle. Do not connect or disconnect boards while powered. Frequently asked questionsCan I use this amp in an active configuration, meaning one channel places highs for the tweeter, and the other plays lows for the woofer?Yes, that is available.How can I stream from PC wirelessly?You can use any software that supports Airplay, DLNA or UPnP protocols. Such as iTunes, Muiscbee, Foobar2000 etc.Can we listen to a radio with a personalized link? If yes, how ?Yes, this is available. There are 2 ways you can do this.1. 4STREAM APP> Internet radio> Click on the menu icon on the top right corner.>You should see a "Custom URL" button, then you can put in your link there and listen to the radio that URL points to.2. Entry web control>Radio>register your account>my stationCan a Google Home stream to this over wifi?Currently, Up2Stream Amp only support connecting Google Home or Alexa via Bluetooth or Line in.HOW TO CONNECTBasic board integrationSource: Supported power supplyConnection: Power and ground according to the board markingsOutput connection: Confirmed audio output to the next stageWireless source buildSource: Phone or network audioConnection: Wi-Fi or Bluetooth to the boardOutput connection: Board audio output to amplifier stageAccessory-board buildSource: Selected compatible expansion boardConnection: Confirmed header or cable connectionOutput connection: Required input or output interfaceTechnical Specifications Feature Specification Connectivity WiFiIEEE802.11 b/g/n 2.4GBluetooth5.0 SBC/AAC, 15M, BT ReceiverWired NetworkEthernet Single 10/100M RJ45 ProtocolsAirPlay, DLNA, UPnP, Spotify Connect, Qplay Interface Power Input12V-24V/DC in12V-24V 2Pin ConnectorAnalog Input3.5mm Line Input (1 Vrms)4 pin connector Line Input (1 Vrms)Analog Output4 pin connector Line Out (1 Vrms)Speaker Out Digital InputMicro USB Input*SPDIF In pin connector I/O InterfaceLED pin connectorIR pin connectorButton pin connectorRotary encoder pin connectorGPIO pin connectorMono Out pin connector Sound Audio FormatDecoding up to 192khz/24bitOutput up to 44.1khz/16bit CD qualityMusic FormatFLAC/MP3/AAC/AAC+/ALAC/APE/WAV NASSupport NAS with DLNA supportSNR/THD+N91dB/0.03%, @1kHz 50W+50W 24V-4ΩUSB HostFor USB pen drive/stick, 1000 songs limited. Frequency response20Hz to 20kHz Speaker and Amplifier Stereo2x50W @ 4ohm load at 24V2x30W @ 8ohm load at 24V2x15W @ 8ohm load at 15VMono100W @ 2ohm load at 24V60W @ 4ohm load at 21V30W @ 8ohm load at 18V Speaker Impedance4-8ΩAmplifier ChipTPA3116D2 General and Accessory Working temperature0~40℃ Acessory220mm Internal WiFi Antenna x24Pin Phoenix ConnectorScrew DriverUser Manual Reset Button and LED Indicators Device onShort press once: Switch input modeLong press once: Switch offShort press twice: Disconnect current WiFi connection and enter paring mode (WiFi mode)；Disconnect current connected Bluetooth device (Bluetooth mode)Short press three times: Restore the factory settingsDevice offShort press: Switch on LED Indicators⚪White-WiFi & network mode:Flashing fast-device is bootingFlashing slow- waiting for WiFi connectionSolid- WiFi is connected🔵Blue-Bluetooth mode:Flashing slow- waiting for Bluetooth connectionSolid- Bluetooth is connected🟢Green-Line in mode🔴Red-USB mode🟡Yellow-connect to PC🟣Purple-Spdif in mode Additional Product ContentComparison: EMiUZEK Wireless Audio Boards Model Confirmed connections Best fit D10 2.4 GHz Wi-Fi, Bluetooth, AirPlay, DLNA, UPnP Basic DIY network-streaming core D30 USB, HDMI ARC, optical, RCA, subwoofer out, 5 V / 12 V TV, 2.1-channel and broad-I/O builds D50 Bluetooth 5.3, Micro-USB/battery power, USB sound-card mode Compact or portable Bluetooth/USB builds AMP D60 2.4 GHz Wi-Fi, Bluetooth 5.3 and amplified stereo output Embedded board that directly powers speakers

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Fosi Audio T20 is a compact Bluetooth tube integrated amplifier for passive speakers and wired headphones.It combines 50W x2 Class D speaker power with replaceable vacuum tubes, RCA input and tone controls for a warm, flexible desktop stereo system. Why it stands outFour reasons this product deserves a place in a well-planned audio system.Tube-Buffered SoundReplaceable vacuum tubes add the tube stage and allow compatible tube rolling.Speaker and Headphone ListeningThe T20 powers passive speakers and also provides a front 3.5mm headphone output.Bluetooth and RCA InputsSwitch between convenient wireless playback and a conventional analog source.Compact Tone ControlIndependent bass and treble controls make it easier to adapt the system to speakers, headphones and room acoustics. Best for Desktop passive-speaker systems Bluetooth music playback Headphone and speaker listening from one compact amplifier Listeners interested in compatible tube rolling Not ideal for Users requiring optical, USB or HDMI inputs Balanced XLR audio systems Turntables without a built-in or external phono preamp Users needing a dedicated subwoofer output EMiUZEK Buying Notes T20 is an integrated speaker amplifier and can directly drive compatible 4–8Ω passive speakers. Its RCA input is line level; a conventional turntable requires a separate phono preamplifier. The 3.5mm jack is a headphone output, not a microphone connection. Frequently Asked QuestionsCan the T20 drive passive speakers directly?Yes. Connect a compatible 4–8Ω passive speaker pair to the rear speaker terminals.Can I connect a turntable?Yes only when the turntable has a built-in phono preamp or is used with an external phono preamp.Does it work as a headphone amplifier?Yes, it includes a front 3.5mm headphone output.Does it accept digital audio?No. Inputs are Bluetooth and analog RCA; optical and USB audio are not provided.Can the tubes be replaced?Yes. Use only compatible tube types and power the unit off before replacement.Does it have a subwoofer output?No dedicated subwoofer output is specified. Use a subwoofer integration method supported by your wider system. HOW TO CONNECTBluetooth speaker systemSource: Phone / tabletConnection: BluetoothOutput: Speaker terminalsTarget: Passive speakersNote: Pair the source and set volume low before playback.Wired stereo systemSource: DAC / streamer / CD playerConnection: RCA line inputOutput: Speaker terminalsTarget: Passive speakersNote: Use a fixed or controlled line-level source.Headphone listeningSource: Phone via Bluetooth or RCA sourceConnection: Bluetooth / RCAOutput: 3.5mm headphone outputTarget: Wired headphonesNote: Lower volume before inserting headphones. Technical SpecificationsAmplifier Feature Specification Product Type Bluetooth tube integrated amplifier Amplifier Chip TI TPA3116 Maximum Speaker Output 50W x2 at 4Ω Speaker Impedance 4–8Ω Connectivity Feature Specification Inputs Bluetooth 5.0; RCA line input Outputs Passive speaker terminals; 3.5mm headphone Tone Controls Bass and treble Audio Feature Specification Vacuum Tubes Replaceable 6K4 pair Frequency Response 20Hz–20kHz (±1.5dB) THD ≤0.04% SNR ≥99dB Recommended System Setup Setup Connection Wireless stereo Phone → Bluetooth → T20 → passive speakers Wired stereo Streamer/DAC → RCA → T20 → passive speakers Headphones Source → T20 → 3.5mm headphones Additional Product Content Feature T20 T20X P3 Product Position 50W x2 tube integrated amp 100W x2 tube integrated amp Tube preamp / headphone amp Passive Speaker Amplifier Yes Yes No Inputs Bluetooth 5.0, RCA Bluetooth, AUX Bluetooth, RCA Speaker Output 50W x2 max at 4Ω 100W x2 max at 4Ω None Headphone Output 3.5mm 3.5mm 3.5mm Tone Controls Bass, treble Bass, treble Bass, treble Tube Rolling Compatible tubes Compatible tubes Compatible tubes Best Use Compact speaker/headphone system Higher-power speaker system Add tube preamp/headphone stage

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📄 Product Description The EMiUZEK D30 is a next-generation Hi-Fi wireless streaming DAC board designed for professional audio builders and enthusiasts who demand uncompromising connectivity and sound performance. D30 integrates premium audio components, expanded input/output options, and flexible power supply design — making it the ultimate all-in-one module for wireless Hi-Fi amplifiers, smart audio systems, and DIY DACs . Key Features 🎵 High-Fidelity Audio with SA5532DR Op-Amp The EMiZEK D30 employs a professioWhy it stands outPurpose-built formatEMiUZEK D30 focuses on the DIY audio board role shown by its existing product configuration.Configuration choiceAvailable selections let buyers match the required color, bundle, connector, capacity or regional power format.System integrationThe existing page information and product images define the supported connection path without assuming undocumented functions.EMiUZEK support pathCentralized download and buying notes help installers verify the product before setup.Best for Custom audio builds OEM prototypes Upgrading an existing enclosure Users comfortable with wiring and integration Not ideal for Plug-and-play retail systems Installers without voltage and pinout experience Projects needing undocumented interfaces Product Details and Connection ViewsEMiUZEK Buying Notes This is a DIY module; verify supply voltage, pinout, grounding and enclosure clearances before power-up. Bundle contents differ by variant; accessories are included only when named in the selected bundle. Do not connect or disconnect boards while powered. Frequently asked questionsCan Up2Stream Pro connect to my own DAC?Yes, just connect the correspond pins to your DAC You need to connect IIS_DATA/LRCK/BCLK/MCLK/VCC_3V3(5V)/GNDCan I stream from YouTube ?Yes you can stream YouTube by AirPlay or Bluetooth.How can I stream from PC wirelessly?You can use any software that supports Airplay, DLNA or UPnP protocols. Such as iTunes, Muiscbee, Foobar2000 etc.HOW TO CONNECTBasic board integrationSource: Supported power supplyConnection: Power and ground according to the board markingsOutput connection: Confirmed audio output to the next stageWireless source buildSource: Phone or network audioConnection: Wi-Fi or Bluetooth to the boardOutput connection: Board audio output to amplifier stageAccessory-board buildSource: Selected compatible expansion boardConnection: Confirmed header or cable connectionOutput connection: Required input or output interfaceTechnical Specifications Feature Specification Interface Power Input5V-1A 2 pin connector5V-1A Micro USB inputAnalog Input3.5mm Line Input (1 Vrms)4 pin connector Line Input (1 Vrms)Analog Output3.5mm Line Out (1 Vrms)4 pin connector Line Out (1 Vrms) Digital InputMicro USB Input Digital OutputI2S Out,*②SPDIF Out (44.1KHz) Sound Audio FormatDecoding up to 192khz/24bitOutput up to 44.1khz/16bit CD qualityMusic FormatFLAC/MP3/AAC/AAC+/ALAC/APE/WAV NASSupport NAS with DLNA supportSNR/THD+N91dB/0.03% @ 0dBFS, 1KHzUSB HostFor USB pen drive/stick, 1000 songs limited. Frequency response20Hz to 20kHz General and Accessory Dimensions117*128*61mmWeight300gWorking temperature0~40℃ Acessory220mm Internal WiFi Antenna4Pin 220mm PH2.0 Cable7Pin 220mm PH2.0 Cable2Pin 220mm Power CableUser Manual Power Button and LED Indicators Device on:Short press once: Switch input modeLong press once: Switch offShort press twice: Disconnect current WiFi connection and enter paring mode (WiFi mode)；Disconnect current connected Bluetooth device (Bluetooth mode)Short press three times: Restore the factory settingsDevice off:Short press: Switch on LED Indicators⚪White-WiFi & network mode:Flashing fast-device is bootingFlashing slow- waiting for WiFi connectionSolid- WiFi is connected🔵Blue-Bluetooth mode:Flashing slow- waiting for Bluetooth connectionSolid- Bluetooth is connected🟢Green-Line in mode🔴Red-USB mode🟡Yellow-connect to PC Additional Product ContentComparison: Choosing the Right Configuration Decision point This product Alternative configuration Different product type Primary role DIY audio board Same model with a different option or bundle Choose only when the required system role changes Compatibility check Verify listed connections Verify included accessories Verify the full signal chain Best choice when The stated role matches your system You need a different plug, color, length or bundle You need functions not documented here

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FiiO BR15 R2R is a high-resolution Bluetooth receiver and desktop DAC designed to upgrade modern and traditional HiFi systems. Featuring a fully differential 24-bit R2R DAC, advanced Bluetooth decoding, USB DAC functionality, and balanced XLR/RCA outputs, BR15 R2R delivers flexible high-quality digital audio connectivity for home audio systems. Why it stands out True R2R DAC Architecture BR15 R2R uses a fully differential R2R DAC design to deliver detailed and natural sound reproduction with high-resolution audio sources. High-Quality Wireless Audio Upgrade Advanced Bluetooth decoding with modern high-resolution codecs allows wireless music playback with excellent sound quality. Flexible Digital Audio Hub With USB, optical, coaxial, RCA, and XLR connectivity, BR15 R2R easily integrates into different HiFi systems. Compact Desktop HiFi Solution Its desktop design provides a simple way to add premium decoding and wireless capability to existing audio equipment. Best for Upgrading traditional amplifiers Active speaker systems Desktop HiFi setups Bluetooth high-resolution audio systems Users wanting R2R DAC performance Not ideal for Users needing a headphone amplifier Users looking for a WiFi streaming player Users requiring a speaker power amplifier Users wanting a portable DAC solution EMiUZEK Buying Notes FiiO BR15 R2R is a Bluetooth receiver and DAC, not a power amplifier. It cannot directly drive passive speakers. Connect it to an amplifier, receiver, or powered speakers for audio playback. For wireless playback, use compatible Bluetooth devices with supported codecs. FAQ Does FiiO BR15 R2R have a built-in headphone amplifier? No. BR15 R2R is mainly designed as a Bluetooth receiver and DAC with line-level outputs. Can FiiO BR15 R2R connect to an amplifier? Yes. It can connect to amplifiers through RCA or balanced XLR outputs. What DAC does FiiO BR15 R2R use? It uses a fully differential 24-bit R2R DAC architecture designed by FiiO. Does FiiO BR15 R2R support LDAC and aptX Lossless? Yes. It supports high-resolution Bluetooth codecs including LDAC and aptX Lossless. Can FiiO BR15 R2R work with active speakers? Yes. The RCA and XLR outputs allow connection to compatible powered speakers. Does FiiO BR15 R2R support USB DAC mode? Yes. It can be connected to computers through USB for high-resolution digital audio playback. Does FiiO BR15 R2R support WiFi streaming? No. BR15 R2R focuses on Bluetooth, USB, optical, and coaxial audio input rather than network streaming. HOW TO CONNECT Bluetooth HiFi Upgrade Source icon: SmartphoneSource: Bluetooth MusicConnection: BluetoothOutput connection: RCA / XLRTarget icon: Amplifier or Active SpeakersOutput: Wireless HiFi System Note: Upgrade traditional audio systems with high-quality Bluetooth playback. USB DAC Setup Source icon: ComputerSource: High Resolution MusicConnection: USBOutput connection: RCA / XLRTarget icon: AmplifierOutput: Desktop HiFi System Note: Use BR15 R2R as a desktop DAC. Digital Audio Setup Source icon: CD Player / TV / Digital SourceSource: Optical / CoaxialConnection: Digital InputOutput connection: Analog OutputTarget icon: AmplifierOutput: HiFi Audio System Note: Add high-quality DAC conversion to digital sources. Technical Specifications DAC Feature Specification DAC Architecture Fully Differential 24-bit R2R USB DAC Resolution Up to 32-bit / 384kHz DSD Support Up to DSD256 PEQ 10-band Parametric EQ Bluetooth Feature Specification Bluetooth Chip Qualcomm QCC5181 Bluetooth Version Bluetooth 5.4/6.0 class chipset LDAC Supported aptX Lossless Supported aptX Adaptive Supported AAC / SBC Supported Inputs Feature Specification USB Audio Input Supported Optical Input Supported Coaxial Input Supported Bluetooth Input Supported Outputs Feature Specification RCA Line Output Supported XLR Balanced Output Supported Optical Output Supported Coaxial Output Supported Recommended System Setup Setup Connection Amplifier Upgrade Phone → BR15 R2R → Amplifier → Speakers Active Speaker System Phone / PC → BR15 R2R → Active Speakers Desktop DAC System Computer → BR15 R2R → Amplifier → Speakers What's in the box FiiO BR15 R2R ×1 Power Cable ×1 USB Cable ×1 Remote Control ×1 User Manual ×1 Download Center Access product manuals, technical documents, and support resources. https://emiuzek.com/pages/download Additional Product Content FiiO BR15 R2R vs FiiO BR13 Feature BR15 R2R BR13 Product Position R2R Bluetooth DAC Bluetooth DAC Receiver DAC Architecture 24-bit R2R Traditional DAC Bluetooth High-resolution Bluetooth Bluetooth Receiver XLR Output Yes No RCA Output Yes Yes USB DAC Yes Limited Best Focus R2R sound + HiFi system upgrade Affordable wireless upgrade

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