Pros

Headphone jack and mic jack on the front, so a wired gaming headset plugs straight in
USB, optical and coaxial inputs, plus RCA out for powered speakers
Bass and treble knobs as well as volume
Plenty of rated power: 500 mW at 32 Ω (maker's figure)

Cons

No gain switch, and reviewers hear hiss with sensitive earphones
One reviewer's first unit failed and the replacement's optical input didn't work
The same reviewer found less volume headroom than the power rating suggests
3.5 mm headphone jack only, no 6.35 mm or balanced output

Updated 27 October 2026

The Fosi Audio K5 Pro is a small desktop DAC and headphone amp aimed at gaming. A wired headset plugs into the front, with separate headphone and mic jacks, and it connects to a PC, Mac, PS5 or Switch over USB, or takes optical and coaxial input from a TV or console. Knobs on the front set the volume, bass and treble, and the RCA outputs on the back can feed powered speakers. It runs from a 5 V USB-C supply.

There’s no gain switch, and reviewers hear hiss with sensitive earphones at higher volume; it suits full-size headsets better. One reviewer’s first unit failed to work on a PS4 and didn’t detect their mic, and the replacement’s optical input didn’t work, while the same reviewer found it quieter than its power rating suggests. Fosi doesn’t list Xbox among supported devices.

DAC chip not named by the maker; Texas Instruments NE5532 op-amp
500 mW at 32 Ω, 80 mW at 300 Ω (maker’s figures); for headphones from 16 to 300 Ω
Inputs: USB-C (up to 24-bit/96 kHz), optical and coaxial (up to 24-bit/192 kHz)
Outputs: 3.5 mm headphone jack, RCA line out
3.5 mm mic input on the front
Volume, bass and treble knobs
Works with PC, Mac, PS5 and Switch (maker’s list)
Powered by 5 V over USB-C
112 × 95 × 30 mm, 251 g