Fosi Audio

Fosi Audio Q4 Mini Stereo Gaming DAC & Headphone Amplifier Audio


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Plug. Play. Done.

The Fosi Audio Q4 DAC/Amp is your go-to for immersing yourself deeper into your favorite games. With no need for special software or drivers, it's a true plug-and-play solution that improves your audio straight out of the box.

Easy connectivity

The Fosi Audio Q4 is a master of versatility with USB, optical, and coaxial S/PDIF inputs, making it compatible with most home audio systems. Its RCA output allows for easy connection to an amplifier or powered speakers, ensuring your desktop setup is as seamless as possible. 

Powerful headphone amplifier

Despite its small frame, the Q4 houses a robust Hi-Fi headphone amp chip capable of driving headphones from 16 ohms to 200 ohms. 

Unmatched audio quality

Experience audio fidelity like never before—160mW RMS at 32 ohms across a 20 Hz - 20 kHz range, with a negligible 0.01% THD. Plus, with customizable bass and treble controls, it doubles as a preamp or volume controller for your PC, MAC, or computer, tailoring the sound to your tastes.

Product highlights

  • True plug-and-play with no need for special software or drivers
  • Versatile connectivity options including USB, optical, and coaxial S/PDIF inputs
  • Built-in Hi-Fi headphone amp supports 16ohm to 200ohm headphones
  • Delivers 160mW RMS with a 0.01% THD for impeccable audio quality
  • Bass and treble control for customizable sound
  • Compact design that fits seamlessly into any desktop setup
  • Streams bit-perfect 24bit/192kHz HD audio with low jitter


  • PC USB support input sampling rate: 24Bit/96kHz
  • High and low sound adjustment range: ±6dB
  • Fiber/coaxial support input sampling rate: 24Bit/192kHz
  • Frequency response: 20Hz-20kHz (±3dB)
  • PC USB support operating system: XP/ Windows 7/ Windows 8/ Windows 10/ MAC/ Linux
  • THD: 0.01%
  • SNR: ≥105dB
  • Amp output maximum power: 100mW @ 32Ω load 
  • Headphone matching impedance: 16Ω-200Ω
  • Working voltage: DC 5V
  • RCA output level: 2.3V
  • Size: 73.5mm x 98mm x 33mm

What’s included

  • Fosi Audio DAC Q4 x1
  • 5V USB Power supply cable x1
  • PC USB cable x1
  • Optical cable x1
  • User manual x1

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