< uses
Fosi Audio SK02
Fosi Audio's desktop USB / optical DAC and headphone amp with 3.5 mm and 4.4 mm balanced outputs
| Maker | Fosi Audio |
|---|---|
| Model | SK02 |
| Type | Desktop DAC and headphone amplifier (ES9038Q2M, 3.5 mm + 4.4 mm balanced) |
Store #
| Store | Price | Checked |
|---|---|---|
| Fosi Audio EU | €109.99 | 2026-10-27 |
Specs #
| Spec | Value |
|---|---|
| DAC chip | ESS SABRE ES9038Q2M |
| Op-amp | SGM8262 |
| Inputs | USB-C, optical |
| Outputs | 3.5 mm headphone, 4.4 mm balanced headphone, 3.5 mm line out / optical |
| Max power | 3.5 mm: 190 mW @ 32 Ω, 4.4 mm: 755 mW @ 32 Ω |
| Headphone impedance | 16-300 Ω (low / high gain) |
| Sampling rate | USB: 32-bit / 384 kHz, DSD256. Optical: 24-bit / 192 kHz |
| SNR | 3.5 mm: 116 dB low gain, 120 dB high gain. 4.4 mm: 110 dB low gain, 115 dB high gain |
| THD | ≤ 0.001% @ 1 kHz |
| Power | 5 V, USB-C |
| Dimensions | 121 × 51 × 43 mm |
| Weight | 380 g |
Description #
The headphone amp on the Gaming PC. It's basically a glorified volume control, and it has a balanced output, which I also got a cable for.
It's a single CNC-machined aluminium body with one big knob that handles power, play/pause and volume, plus buttons for the gain and input modes. It's driverless over USB, and the line out lets it work as a preamp for active speakers or a power amp too.