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  Fosi Audio Fosi Audio V3

  This Fosi Audio V3 listing is for the V3 Mono compact monoblock power amplifier, sold in single-amp and stereo-pair configurations depending on the selected variant.Its TPA3255-based architecture, XLR balanced/RCA inputs and 240W rated mono output support scalable, high-power passive-speaker systems. Why it stands outFour reasons this product deserves a place in a well-planned audio system.True Monoblock ArchitectureEach V3 Mono amplifies one audio channel, allowing separate left/right amplification in a stereo pair.XLR Balanced and RCA InputsThe selectable input formats make integration practical with balanced preamps, DACs and conventional RCA sources.240W Rated Mono OutputStrong single-channel output supports demanding compatible passive speakers when correctly powered.Scalable Power OptionsVariants include amplifier-only and power-supply bundles, including configurations for one or two monoblocks. Best for Stereo systems using two monoblock amplifiers Balanced XLR preamp or DAC systems Compact high-power passive-speaker installations Users planning a modular amplifier upgrade Not ideal for Buyers expecting one unit to power both stereo channels Users without a preamp, DAC or source with volume control Headphone or powered-speaker systems Buyers who have not checked whether their selected variant includes a power supply EMiUZEK Buying Notes This product is V3 Mono: one amplifier powers one speaker channel; two units are required for conventional stereo. Check the selected variant carefully because amplifier quantity and included power supply differ. Use a preamp, DAC or source with suitable volume control; V3 Mono is a power amplifier, not a complete source device. Frequently Asked QuestionsDo I need one or two V3 Mono amplifiers?One unit powers one channel. A standard two-channel stereo system requires two monoblocks.Does every variant include a power supply?No. The listing includes amplifier-only and power-supply bundle options; verify the selected variant.Can it connect to an XLR source?Yes. It supports balanced XLR input as well as RCA input.Can it drive headphones?No. It is a passive-speaker power amplifier and has no headphone output.Does it include Bluetooth or a DAC?No. Connect a compatible external preamp, DAC or streamer.Can I use one 48V/10A supply with two units?A listed two-amplifier bundle is available with a 48V/10A supply; use only the configuration and cabling supplied or specified for that variant. HOW TO CONNECTBalanced stereo systemSource: Balanced DAC / preampConnection: XLR to each monoblockOutput: Speaker terminalsTarget: One passive speaker per V3 MonoNote: Use two units for left and right channels.RCA stereo systemSource: RCA preamp / controlled DACConnection: RCA to each monoblockOutput: Speaker terminalsTarget: One passive speaker per V3 MonoNote: Split left and right outputs to separate units.Single-channel systemSource: Mono source / preamp channelConnection: XLR or RCAOutput: Speaker terminalsTarget: One passive speakerNote: One unit powers one channel only. Technical SpecificationsAmplifier Feature Specification Product Type Mono Class D power amplifier Amplifier Chip TI TPA3255 Rated Output 240W mono Channels per Unit 1 Connectivity Feature Specification Inputs XLR balanced; RCA Output Passive speaker binding posts Input Selection Balanced / RCA selectable Headphone Output None Power and Design Feature Specification Power Options Variant-dependent: no PSU, 48V/5A or 48V/10A bundles Cooling Full-body heat-dissipation chassis System Requirement Preamp or source with volume control Recommended System Setup Setup Connection Balanced stereo Balanced DAC/preamp → two V3 Mono amps → passive speaker pair RCA stereo RCA preamp → two V3 Mono amps → passive speaker pair Single channel Mono line source → one V3 Mono → one passive speaker Additional Product Content Feature V3 Mono ZA3 V3 Stereo Amplifier Format Monoblock Stereo / mono-capable Stereo Channels per Unit 1 2 stereo or 1 mono 2 Amplifier Chip TPA3255 TPA3255 TPA3255 Inputs XLR balanced, RCA XLR balanced, RCA RCA Rated / Maximum Positioning 240W rated mono High-power stereo/mono 300W x2 maximum Stereo Units Required 2 1 in stereo mode 1 Pre-out No Subwoofer output 3.5mm pre-out Tone Controls No No No Best Use Dedicated monoblock stereo Flexible balanced amp Simple RCA stereo

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  $109.00 - $279.00

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  Fosi Audio Fosi Audio Box X5

  Fosi Audio Box X5 is a compact phono preamplifier for moving-magnet and moving-coil turntable cartridges.Four selectable gain settings, precise RIAA equalization and low-noise components make it a flexible upgrade between a turntable and a line-level amplifier or powered speakers. Why it stands out MM and MC cartridge supportA front-panel cartridge selector and 38 / 48 / 56 / 66 dB gain settings accommodate a broad range of phono cartridges. Precision analog signal pathOPA1612 amplification, precision film components and gold-plated RCA connections are designed for accurate, low-noise vinyl playback. Simple system integrationDedicated RCA input, RCA output and grounding terminal provide a straightforward connection between a turntable and a line-level audio system. Low-noise, user-friendly analog designAn aluminum chassis, one-touch controls and dedicated grounding support make setup straightforward while helping preserve a clean phono signal.Best for Turntables with MM or MC cartridges Vinyl systems without a built-in phono stage Upgrading an entry-level integrated phono preamp Compact desktop or living-room analog systems Not ideal for Turntables that only provide USB audio Users needing Bluetooth or digital inputs Directly driving passive speakers or headphones EMiUZEK Buying Notes Box X5 is a phono preamplifier, not a speaker power amplifier. Connect its RCA output to a line-level AUX input, powered speakers or a separate amplifier; do not connect it to another PHONO input. Select MM/MC mode and gain according to the cartridge manufacturer's output specification. Frequently asked questions Does Box X5 support both MM and MC cartridges?Yes. It provides selectable MM/MC operation and four gain settings. Does it include Bluetooth, USB or optical input?No. Box X5 is an analog phono stage with RCA phono input and RCA line output. Can it power passive speakers?No. A separate power amplifier or powered speakers are required. Can it be connected to powered speakers?Yes, provided the speakers have a compatible analog line input and their own volume control. Should I connect the turntable ground wire?Yes, when the turntable provides one. Proper grounding helps reduce hum. Can it be used as a normal line-level preamplifier?No. Its gain and RIAA equalization are designed specifically for phono cartridges. HOW TO CONNECT Turntable to integrated amplifierSource icon: turntableSource: MM or MC turntableConnection: RCA phono input + groundOutput connection: RCA line outputTarget icon: amplifierOutput: AUX / line input on an integrated amplifierNote: Do not connect the Box X5 output to another PHONO input. Turntable to powered speakersSource icon: turntableSource: MM or MC turntableConnection: RCA phono input + groundOutput connection: RCA line outputTarget icon: speakersOutput: Powered speakers with analog input Turntable to headphone systemSource icon: turntableSource: MM or MC turntableConnection: RCA phono input + groundOutput connection: RCA line outputTarget icon: headphonesOutput: Headphone amplifier connected to headphonesNote: Box X5 does not include a headphone amplifier; connect its line output to a separate headphone amplifier.Technical SpecificationsInputs and outputs Feature Specification MM / MC RCA phono input Included RCA line output Included Turntable grounding terminal Included Audio performance Feature Specification Gain 38 / 48 / 56 / 66 dB Frequency Response 20 Hz–20 kHz (±0.015 dB) THD ≤0.009% SNR ≥92 dB Operational Amplifier OPA1612 Physical and power Feature Specification Dimensions 4.1 × 6.5 × 1.4 in Power Supply 16 V / 1 A

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  $109.90 - $111.77

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  Fosi Audio Fosi Audio GR40

  Fosi Audio GR40 is a desktop tube DAC, headphone amplifier and preamplifier for digital and Bluetooth sources.USB, 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.Why it stands outMulti-input desktop DACAccepts USB, optical, coaxial and Bluetooth sources in one compact component.Tube analog stageTwo replaceable 5654W tubes add tube-based amplification and visual character.Headphone and preamp operationUse the front 3.5mm headphone output or feed powered speakers and power amplifiers from RCA.High-resolution and codec supportSupports PCM 32-bit/384kHz, DSD256 and Bluetooth codecs including aptX HD and aptX LL.Best for Desktop headphone listening TVs with optical audio output Computers using USB audio Powered speakers or separate power amplifiers Not ideal for Directly driving passive speakers Balanced headphone or XLR systems Turntables without a phono preamplifier EMiUZEK Buying Notes GR40 is not a speaker power amplifier; passive speakers require a separate power amplifier. The RCA output is muted when headphones are connected. Allow the tubes to cool before removal and only use officially compatible replacements. Frequently asked questionsCan GR40 power passive speakers?No. Connect its RCA output to a separate power amplifier or use powered speakers.Can it connect to a TV?Yes, through a compatible optical or coaxial digital output.Does it include a phono input?No. A turntable requires a built-in or external phono preamplifier.Which headphones are supported?The official range is 32–300Ω through the 3.5mm output.Can the tubes be replaced?Yes, but only with compatible tube types and after the unit is powered off and cool.What Bluetooth codecs are supported?SBC, AAC, aptX, aptX HD and aptX LL are listed in the manual.HOW TO CONNECTComputer headphone systemSource icon: computerSource: Windows PC / MacConnection: USB audioOutput connection: 3.5mm headphone outputTarget icon: headphonesOutput: Wired headphonesTV headphone systemSource icon: tvSource: TVConnection: Optical or coaxial PCMOutput connection: 3.5mm headphone outputTarget icon: headphonesOutput: Wired headphonesPowered speaker or amplifier systemSource icon: streamerSource: Digital source / Bluetooth deviceConnection: USB, optical, coaxial or BluetoothOutput connection: RCA pre-outputTarget icon: speakersOutput: Powered speakers or separate power amplifierTechnical SpecificationsInputs and outputs Feature Specification Inputs USB; optical; coaxial; Bluetooth Outputs RCA pre-output; 3.5mm headphone output Channels 2.0 Tube complement 2 × 5654W Digital and headphone performance Feature Specification Maximum resolution PCM 32-bit / 384kHz; DSD256 Bluetooth 5.1; SBC, AAC, aptX, aptX HD, aptX LL Headphone impedance 32–300Ω Output power 300mW @ 16Ω; 250mW @ 32Ω; 50mW @ 250Ω; 40mW @ 300Ω SNR ≥103dB Power input DC 12V Additional Product ContentComparison: Which Fosi Audio model is right for you? Model GR40 GR70 K7 Product position Tube DAC / headphone amp / preamp Analog tube headphone amp / preamp Balanced digital DAC / headphone amp Digital inputs USB, optical, coaxial, Bluetooth None USB, optical, coaxial, Bluetooth Headphone outputs 3.5mm 3.5mm and 6.35mm 3.5mm and 4.4mm balanced Speaker-system output RCA pre-out RCA pre-out RCA line output Best use Digital sources with tube stage Analog tube headphone system High-output HiFi and gaming

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  $119.90 - $137.42

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  Fosi Audio Fosi Audio MC331

  Fosi Audio MC331 is a compact tube integrated amplifier combining digital and analog source selection, speaker amplification, headphone listening and preamplifier output.Its replaceable tubes, illuminated VU meter, remote control and 105W × 2 maximum output at 4Ω make it a flexible desktop or bookshelf-speaker hub.Why it stands outAll-in-one audio hubCombines a DAC, integrated speaker amplifier, preamplifier and headphone amplifier in one compact chassis.Five source inputsAccepts Bluetooth, USB, optical, coaxial and RCA sources with remote input switching.Tube character with visual appealReplaceable 5654W-family tubes and a warm VU meter add adjustable tube character and a retro presentation.Flexible system expansionDrives passive speakers while pre-out and 3.5mm headphone outputs support additional listening configurations.Best for Desktop and small-room passive speaker systems Users switching between computer, TV, Bluetooth and analog sources Headphone and speaker listening from one compact component Listeners who enjoy replaceable tubes and VU-meter styling Not ideal for Turntables without a built-in or external phono preamp Systems requiring HDMI ARC Passive subwoofers that need a dedicated powered subwoofer channel EMiUZEK Buying Notes MC331 is an integrated amplifier and can directly drive 4–8Ω passive speakers. Its RCA input is line level; a conventional turntable requires a phono preamp. Pre-out is for an active subwoofer or downstream amplifier; it is not a passive subwoofer output. Frequently asked questionsCan MC331 drive passive speakers directly?Yes. Connect 4–8Ω passive speakers to its speaker terminals.Does it include a phono input?No. A turntable needs a built-in phono stage or a separate phono preamp before the RCA input.Can I connect a TV?Yes, through optical, coaxial or RCA audio output. MC331 does not provide HDMI ARC.Can I use headphones?Yes. It includes a front 3.5mm headphone output.Can I add a subwoofer?Yes. Use pre-out with a powered subwoofer or another compatible downstream device.Are the tubes replaceable?Yes. Officially listed compatible families include 6AK5, 6AK5W, 6Zh1P and 6J1.HOW TO CONNECTPassive speaker systemSource: Phone, computer, TV or line-level sourceConnection: Bluetooth, USB, optical, coaxial or RCAOutput: Speaker terminalsTarget: 4–8Ω passive speakersNote: Select the matching input and begin at low volume.Headphone setupSource: Digital or analog sourceConnection: Bluetooth, USB, optical, coaxial or RCAOutput: 3.5mm headphone outputTarget: Wired headphonesNote: Disconnect or lower speaker output before private listening.2.1 system with powered subwooferSource: Digital or analog sourceConnection: Chosen source inputOutput: Speaker terminals + pre-outTarget: Passive speakers + powered subwooferNote: Use the subwoofer's own level and crossover controls for integration.Technical SpecificationsCore specifications Feature Specification Product type Tube integrated DAC / amplifier / headphone amplifier Maximum speaker output 105W × 2 at 4Ω Speaker impedance 4–8Ω THD ≤0.03% SNR ≥100dB Power supply 24V / 4.5A Inputs and outputs Feature Specification Inputs Bluetooth, USB, optical, coaxial, RCA Outputs Passive speaker terminals, pre-out, 3.5mm headphone output Bluetooth codecs SBC, AAC Replaceable tubes 6AK5, 6AK5W, 6Zh1P, 6J1 Recommended System Setup Setup Connection Desktop speakers PC → USB → MC331 → Passive speakers TV audio TV optical output → MC331 → Passive speakers 2.1 system Source → MC331 → Passive speakers + powered subwoofer Additional Product ContentFosi Audio product comparisonCompare the two compact Fosi Audio integrated amplifiers by the differences that most affect system matching. Feature MC331 MC351 Product position Tube DAC / integrated stereo amplifier High-power 2.1 digital integrated amplifier Built-in speaker amplifier Yes Yes Maximum output 105W × 2 at 4Ω 165W × 2 + 350W at 4Ω Main inputs Bluetooth, USB, optical, coaxial, RCA Bluetooth 5.3, USB, optical, coaxial, RCA Speaker output Stereo passive speakers Stereo passive speakers Passive subwoofer output No Yes, dedicated amplified output Line-level pre-out Yes Yes Headphone output Yes, 3.5mm No Tube stage Yes, replaceable tubes No Best use Compact tube stereo and headphone system Powerful passive-speaker 2.1 system

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  $129.90 - $143.77

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  Fosi Audio Fosi Audio Q6

  Fosi Audio Q6 is a compact fixed-output desktop DAC for converting USB-C, optical or coaxial digital sources to RCA analog audio and sub-out.Its AK4493S and XMOS XU316 chipset supports PCM 32-bit/768kHz and DSD512 over USB while delivering 121dB SNR for a clean stereo system upgrade.Why it stands outAKM desktop conversionThe AK4493S DAC and premium supporting chipset target high-resolution, low-distortion stereo playback.High-resolution USB audioUSB supports PCM up to 32-bit/768kHz and native DSD512.Three digital source inputsUSB-C, optical and coaxial connect computers, TVs, streamers and CD transports.RCA plus sub-outAnalog RCA and sub-out simplify stereo or 2.1 integration.Best for Digital streamers and CD transports Computer-based HiFi systems TV optical PCM into an amplifier Fixed-output DAC systems with downstream volume control Not ideal for Headphone listening without a separate headphone amplifier Users needing built-in volume control or preamplification Analog sources such as turntables EMiUZEK Buying Notes Q6 is a fixed-output DAC, not a preamplifier; control volume downstream. It has no headphone output and requires an amplifier, headphone amp or powered speakers. The sub-out is line level and requires a powered subwoofer. Frequently asked questionsCan Q6 drive headphones?No. Add a separate headphone amplifier.Does it control volume?No. It is a fixed-output DAC, so use an amplifier, preamp or powered-speaker volume control.Can it connect to a turntable?No. It accepts digital inputs only.Can it connect to a TV?Yes, by optical or coaxial PCM audio.What does sub-out connect to?A powered subwoofer with a compatible line input.Does USB support DSD?Yes, up to DSD512 from a compatible source and playback setup.HOW TO CONNECTStreamer systemSource: Digital streamerConnection: Optical or coaxialOutput: RCATarget: Integrated amplifierNote: Control volume at the amplifier.Computer HiFiSource: PC, Mac or tabletConnection: USB-C audioOutput: RCATarget: Amplifier or powered speakersNote: Use compatible USB playback settings.2.1 systemSource: Digital sourceConnection: USB, optical or coaxialOutput: RCA + sub-outTarget: Amplifier + powered subwooferNote: Q6 output is fixed; manage levels downstream.Technical SpecificationsAudio performance Feature Specification DAC / USB chipset AK4493S / XMOS XU316 USB maximum PCM 32-bit / 768kHz; DSD512 Optical / coaxial Up to 32-bit / 192kHz SNR / Dynamic range ≥121dB / 121dB THD <0.00012% Connections and power Feature Specification Inputs USB-C, optical, coaxial Outputs RCA, sub-out Other components OPA1612, NE5532DR Power supply 5V / 2A Volume control No; fixed output Recommended System Setup Setup Connection Streamer system Streamer → Q6 → Integrated amplifier Computer system Computer → Q6 → Powered speakers 2.1 system Digital source → Q6 → Amplifier + powered subwoofer Additional Product ContentFosi Audio product comparisonCompare the models by the differences that most affect system matching and everyday use. Feature Q6 Q4 ZD3 Product position Fixed-output stereo DAC DAC + headphone amp / volume control Balanced DAC / preamp DAC chip AK4493S 97220-based chipset ES9039Q2M USB maximum 32-bit / 768kHz, DSD512 24-bit / 96kHz 32-bit / 768kHz, DSD512 Other inputs Optical, coaxial Optical, coaxial HDMI ARC, optical, coaxial, Bluetooth Analog outputs RCA, sub-out RCA RCA, XLR Headphone output No 3.5mm No Volume control No Yes Yes with bypass Balanced output No No Yes, XLR SNR ≥121dB ≥105dB ≥126dB Best use Simple high-performance DAC Entry headphones and desktop Flexible balanced TV/HiFi hub

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  $85.00 - $105.48

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  Fosi Audio Fosi Audio BT20A Pro

  Fosi Audio BT20A Pro is a compact Bluetooth stereo integrated amplifier built around the TI TPA3255 for passive speakers.It 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. Why it stands outTPA3255 stereo amplificationDelivers high-efficiency Class-D power with low specified distortion in a compact chassis.Variable pre-out expansionThe 3.5 mm pre-out can feed compatible powered speakers, a powered subwoofer or another amplifier.Replaceable op-ampsSocketed NE5532 op-amps allow experienced users to tailor the analog stage with compatible DIP8 replacements.Flexible power configurationsAvailable power-supply choices let buyers balance system output, size and cost. Best for Desktop and bookshelf passive-speaker systems Compact stereo systems with a powered subwoofer Bluetooth and RCA source switching Users interested in compatible op-amp rolling Not ideal for Systems requiring HDMI ARC, optical or USB input Users needing a headphone output Turntables without a phono preamplifier EMiUZEK Buying Notes Maximum power depends on the selected supply and speaker load; choose the power-supply variant appropriate for the system. The 3.5 mm connector is a pre-out, not a headphone jack. Bluetooth takes input priority; disconnect Bluetooth when using RCA if the wired source is not heard. Frequently asked questionsCan it power passive speakers?Yes. It supports 2–8 Ω passive speakers.Can it connect to a powered subwoofer?Yes, through the variable 3.5 mm pre-out using the appropriate cable.Is the pre-out a headphone output?No.Can I connect a turntable?Yes only through a turntable with line output or an external phono stage.Does it support aptX?No. The official documentation specifies SBC/AAC and states that aptX variants are not supported.Can RCA and Bluetooth play simultaneously?No. Only one input mode is used at a time. HOW TO CONNECTPassive speaker systemSource icon: streamerSource: Streamer / DAC / phoneConnection: RCA or BluetoothOutput connection: Speaker terminalsTarget icon: speakersOutput: Passive speakers2.1 stereo systemSource icon: streamerSource: Streamer / DACConnection: RCAOutput connection: Speaker terminals + 3.5 mm pre-outTarget icon: speakersOutput: Passive speakers + powered subwoofer Pre-out expansion systemSource icon: streamerSource: Streamer / DAC / phoneConnection: RCA or BluetoothOutput connection: 3.5 mm variable pre-outTarget icon: speakersOutput: Powered speakers, powered subwoofer or downstream amplifierNote: Confirm input compatibility and begin with the volume set low.Technical SpecificationsInputs Feature Specification Bluetooth 5.0 Included RCA line input Included Outputs Feature Specification Stereo speaker binding posts Included 3.5 mm variable pre-out Included Amplification Feature Specification Amplifier Chip TI TPA3255 Maximum Output Power 300 W × 2 at 4 Ω Speaker Impedance 2–8 Ω THD ≤0.005% SNR ≥108 dB Frequency Response 20 Hz–20 kHz (±1.2 dB) Socketed Op-Amps 2 × NE5532 Connectivity and power Feature Specification Bluetooth Codecs SBC / AAC Bluetooth Range up to 50 ft without obstacles DC Input Range 24–48 V Power Supply Options 32 V / 5 A or 48 V / 5 A, depending on variant Dimensions approximately 5 × 5 × 1 in Additional Product ContentComparison: BT20A or BT20A Pro? Feature BT20A BT20A Pro Amplifier chip Dual TPA3116D2 TPA3255 Maximum output 100 W × 2 300 W × 2 at 4 Ω Pre-out No 3.5 mm variable pre-out Best use Simple compact stereo Higher-output expandable stereo

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  $89.25 - $119.90

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  Fosi Audio Fosi Audio BT20A

  Fosi Audio BT20A is a compact two-channel Class-D integrated amplifier for passive speakers, with Bluetooth and RCA inputs.It combines straightforward wireless playback, bass and treble adjustment, and up to 100 W per channel maximum output in a small desktop-friendly chassis. Why it stands outCompact passive-speaker amplifierProvides stereo speaker amplification without the size and complexity of a full-size receiver.Bluetooth and wired playbackSwitch between Bluetooth 5.0 streaming and an analog RCA source.Front-panel tone controlIndependent bass and treble knobs make quick system tuning simple. Simple everyday operationA compact front panel keeps power, volume, bass and treble adjustment immediately accessible without menus or an app.Best for Desktop passive-speaker systems Bookshelf speakers in small and medium rooms Simple Bluetooth stereo systems TVs or streamers with analog line output Not ideal for Systems requiring HDMI ARC, optical or USB input Users needing a subwoofer output Headphone listening EMiUZEK Buying Notes BT20A powers passive speakers; it is not intended as an input for powered speakers. The quoted 100 W × 2 is the manufacturer's maximum specification and depends on load and power supply. It has no phono stage, so most turntables require a phono preamplifier or line-level output. Frequently asked questionsCan it drive passive speakers directly?Yes. It supports 2–8 Ω passive speakers through the rear binding posts.Can it connect to active speakers?No dedicated pre-output is provided. Use BT20A to power passive speakers.Does it have a subwoofer output?No.Can I connect a turntable?Only when the turntable has a built-in phono stage or an external phono preamplifier is used.Does it support aptX?The official specification lists Bluetooth 5.0 but does not specify aptX support.Can I connect a TV?Yes, when the TV provides compatible analog audio output; there is no optical or HDMI input. HOW TO CONNECTBluetooth speaker systemSource icon: phoneSource: Phone / tabletConnection: Bluetooth 5.0Output connection: Speaker terminalsTarget icon: speakersOutput: Passive speakersWired stereo systemSource icon: streamerSource: Streamer / DAC / TV analog outputConnection: RCAOutput connection: Speaker terminalsTarget icon: speakersOutput: Passive speakers Turntable stereo systemSource icon: turntableSource: Turntable with built-in phono stage or external phono preamplifierConnection: RCA line inputOutput connection: Speaker terminalsTarget icon: speakersOutput: Passive speakersNote: Do not connect a phono-level turntable directly unless a compatible phono preamplifier is used.Technical SpecificationsInputs Feature Specification Bluetooth 5.0 Included RCA line input Included Outputs Feature Specification Stereo speaker binding posts Included Amplification Feature Specification Amplifier Architecture Class D Amplifier Chipset Dual TI TPA3116D2 Maximum Output Power 100 W × 2 Speaker Impedance 2–8 Ω Frequency Response 20 Hz–20 kHz (±1 dB) SNR ≥98 dB THD ≤0.5% Connectivity and power Feature Specification Bluetooth Range up to approximately 15 m / 50 ft without obstacles DC Input Range 12–24 V Supplied Power Adapter 24 V / 4.5 A Additional Product ContentComparison: BT20A or BT20A Pro? Feature BT20A BT20A Pro Amplifier chip Dual TPA3116D2 TPA3255 Maximum output 100 W × 2 300 W × 2 at 4 Ω Pre-out No 3.5 mm variable pre-out Best use Simple compact stereo Higher-output expandable stereo

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  $78.08 - $79.90

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  Fosi Audio Fosi Audio ZD3

  Fosi Audio ZD3 is a fully balanced desktop DAC and preamplifier for computers, televisions, wireless sources and dedicated digital transports.The ES9039Q2M platform, HDMI ARC, USB, Bluetooth, XLR/RCA outputs and bypass mode make it a versatile digital hub for modern HiFi systems.Why it stands outFour reasons this product deserves a place in a well-planned audio system.ES9039Q2M Balanced ConversionThe flagship ESS DAC architecture supports high-resolution decoding and balanced analog output.HDMI ARC for Television AudioConnect a compatible TV directly and control a stereo system without relying on a separate AV receiver.Variable or Fixed OutputUse preamp mode for direct volume control or bypass mode for a fixed-level connection to another preamplifier.Trigger and Remote Integration12V trigger input/output, OLED display and remote control streamline everyday system operation.Best for TV-to-HiFi upgrades using HDMI ARC Balanced power amplifiers such as ZA3 or V3 Mono Computer USB audio systems Bluetooth and multi-source digital systems Active speakers with XLR or RCA input Not ideal for Users needing built-in speaker amplification Headphone listeners without a separate headphone amplifier Analog-only sources such as a turntable Systems requiring Wi-Fi network streaming apps inside the DAC EMiUZEK Buying Notes ZD3 is a DAC/preamp, not a speaker power amplifier; connect it to active speakers or a separate amplifier. Use bypass only when downstream equipment provides volume control, because bypass sends fixed-level output. HDMI is ARC audio input rather than a general HDMI video switch or HDMI output. Frequently Asked QuestionsCan the ZD3 drive passive speakers?No. Connect its XLR or RCA output to a power amplifier before passive speakers.Can it connect directly to a television?Yes, through a compatible HDMI ARC connection. Configure the television for supported digital audio output.Does it have a headphone output?No. Add a separate headphone amplifier if headphone listening is required.Can it connect to active speakers?Yes. Use XLR or RCA output and operate the ZD3 in preamp mode for volume control.What is bypass mode?It bypasses variable preamp control and sends fixed-level output to a downstream preamp or integrated amplifier.Does Bluetooth transmit to headphones?No. Bluetooth is an input for receiving audio from a source device.Does it support high-resolution USB audio?Yes, up to PCM 32-bit/768kHz and DSD512 over USB with compatible hardware and software.HOW TO CONNECTTV stereo systemSource: TelevisionConnection: HDMI ARCOutput: XLR or RCATarget: Power amplifier or active speakersNote: Select a compatible PCM output setting on the TV if required.Computer audioSource: PC / MacConnection: USBOutput: XLR or RCATarget: Power amplifier, headphone amp or active speakersNote: Some Windows configurations require the Fosi USB driver.Wireless audio systemSource: Phone / tabletConnection: Bluetooth 5.0Output: XLR or RCATarget: Amplifier or active speakersNote: Bluetooth is receive-only on the ZD3.Technical SpecificationsCore Architecture Feature Specification Product Type Balanced DAC / preamplifier DAC ESS ES9039Q2M USB Interface XMOS XU316 Bluetooth Chip QCC3031 Op-Amp LME49720; swappable design Digital Audio Feature Specification USB Maximum PCM 32-bit/768kHz; DSD512 Optical / Coaxial Maximum PCM 24-bit/192kHz Bluetooth Maximum PCM 24-bit/48kHz Bluetooth Codecs aptX HD, aptX, AAC, SBC Bluetooth Version 5.0 Inputs and Outputs Feature Specification Inputs USB, HDMI ARC, coaxial, optical, Bluetooth Outputs Balanced XLR; RCA XLR Output Level 5Vrms RCA Output Level 2.5Vrms Trigger 12V trigger input and output Measured Performance Feature Specification SINAD 126dB SNR ≥126dB THD+N <0.00008% Dynamic Range ≥123dB Noise Floor ≤2μV Power Supply DC 12V/1.5A Recommended System Setup Setup Connection TV HiFi TV → HDMI ARC → ZD3 → amplifier → passive speakers Balanced desktop Computer → USB → ZD3 → XLR active speakers Wireless system Phone → Bluetooth → ZD3 → amplifier or active speakers Additional Product Content Feature ZD3 ZH3 GR40 Product Position Balanced DAC / preamp DAC / headphone amp / preamp Tube DAC / headphone amp DAC Chip ES9039Q2M AKM AK4493SEQ Not specified USB Maximum PCM 768kHz / DSD512 PCM 768kHz / DSD512 Product-dependent lower tier HDMI ARC Yes No No Bluetooth Input Yes No Yes Headphone Output No 4.4mm, 6.35mm 3.5mm Analog Input No RCA No Balanced Line Output XLR XLR No Remote Control Yes Yes No Best Use TV and balanced amplifier hub Complete desktop/headphone hub Compact tube-flavoured desktop audio

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  $179.90

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  Fosi Audio Fosi Audio K7

  Fosi Audio K7 is a fully balanced desktop DAC and headphone amplifier designed for HiFi listening, gaming and communication.AK4493SEQ conversion, USB/optical/coaxial/Bluetooth inputs, microphone support and powerful 3.5mm and 4.4mm outputs make it a comprehensive desktop audio hub.Why it stands outFully balanced high-output designThe 4.4mm output provides at least 2.1W + 2.1W at 32Ω for compatible headphones.Audiophile digital architectureCombines an AK4493SEQ DAC, XMOS XU208 USB processor and TPA6120 headphone amplification.Gaming and microphone featuresA microphone input with noise reduction and physical EQ controls support gaming and online communication.Extensive source connectivityAccepts USB-C, optical, coaxial and Bluetooth aptX HD/LL sources.Best for Desktop HiFi headphone systems PC and console gaming TVs and projectors with digital output Powered speakers or amplifiers using RCA Not ideal for Directly driving passive speakers Portable battery-powered use Users requiring HDMI ARC EMiUZEK Buying Notes The 4.4mm output requires correctly wired balanced headphones; do not use an unsafe single-ended adapter. RCA is a line-level output for powered speakers or amplifiers, not passive speakers. Microphone compatibility and console operation depend on the selected input mode and system settings. Frequently asked questionsWhat is the maximum headphone output?The balanced output is rated at ≥2.1W + 2.1W at 32Ω; the 3.5mm output is ≥600mW + 600mW at 32Ω.Does K7 support Bluetooth?Yes, including aptX HD and aptX LL.Can it connect to a TV?Yes, through compatible optical or coaxial PCM output.Can it power passive speakers?No. Use its RCA output with powered speakers or a power amplifier.Does it support microphones?Yes, through the 3.5mm microphone input and compatible system setup.What is the maximum USB resolution?PCM up to 32-bit/384kHz and DSD256.HOW TO CONNECTPC gaming and communicationSource icon: computerSource: PC / MacConnection: USB-C audio + microphoneOutput connection: 3.5mm or 4.4mm headphone outputTarget icon: headphonesOutput: Gaming headset / headphonesTV headphone systemSource icon: tvSource: TV / projectorConnection: Optical or coaxial PCMOutput connection: Headphone outputTarget icon: headphonesOutput: Wired headphonesPowered speaker systemSource icon: streamerSource: PC / streamer / Bluetooth deviceConnection: USB, digital or BluetoothOutput connection: RCA line outputTarget icon: speakersOutput: Powered speakers or amplifierTechnical SpecificationsDigital architecture Feature Specification DAC AKM AK4493SEQ USB processor XMOS XU208 Headphone amplifier TPA6120 Maximum resolution PCM 32-bit / 384kHz; DSD256 Inputs USB-C; optical; coaxial; Bluetooth; 3.5mm microphone Outputs and performance Feature Specification Outputs 3.5mm single-ended; 4.4mm balanced; RCA 3.5mm rated output ≥600mW + 600mW @ 32Ω 4.4mm rated output ≥2.1W + 2.1W @ 32Ω SNR ≥121dB THD+N ≤0.0002% Power input DC 12V Additional Product ContentComparison: Which Fosi Audio model is right for you? Model K5 Pro Q4 K7 Primary use Gaming DAC with microphone Simple desktop DAC/headphone amp Premium HiFi and gaming DAC Inputs USB, optical, coaxial, microphone USB, optical, coaxial USB, optical, coaxial, Bluetooth, microphone Headphone output 3.5mm 3.5mm 3.5mm and 4.4mm balanced Maximum USB playback 24-bit / 96kHz 24-bit / 96kHz 32-bit / 384kHz; DSD256 Best use Budget gaming communication Basic music and TV upgrade High-output balanced desktop system

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  $111.48 - $199.90

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