Fosi Audio Q4 Mini DAC/Headphone Amp

The Fosi Audio Q4 is a compact, plug-and-play digital-to-analog converter and headphone amplifier. It accepts USB, optical, and coaxial digital audio and provides RCA and headphone outputs, with bass and treble controls for desktop listening.

Technical Specifications

• Model: Q4
• Digital inputs: USB, optical, coaxial
• Outputs: 3.5mm headphone, RCA
• USB sampling rate: Up to 24-bit/96kHz
• Optical / coaxial sampling rate: Up to 24-bit/192kHz
• Bass / treble adjustment: ±6dB
• Frequency response: 20Hz–20kHz (±3dB)
• Maximum headphone output: 100mW at 32 Ω
• Headphone impedance: 16–200 Ω
• RCA output level: 2.3V
• THD: 0.01%
• SNR: ≥105dB
• Power: DC 5V
• Dimensions: 73.5 × 98 × 33mm (excluding knobs and terminals)
• Supported systems: Windows XP/7/8/10, macOS, Linux