Fosi Audio SK02: a palm-sized desktop DAC/amp built on the ESS ES9038Q2M, with 3.5mm single-ended and 4.4mm balanced outputs delivering up to 755mW at 32 ohms. It suits a computer desk that wants balanced headphone power plus a 3.5mm preamp line out for powered monitors.
Who the Fosi Audio SK02 is for
Balanced-cable owners at the desk: A 4.4mm balanced output sits beside the 3.5mm single-ended jack, so balanced IEM and headphone cables plug straight in.
Computer-and-powered-monitor setups: Through its 3.5mm line out it doubles as a preamp between a computer and a pair of powered monitors.
High-resolution file libraries: It decodes PCM up to 32-bit/384kHz and DSD256 over USB-C.
Desks short on space: The palm-sized chassis brings balanced output and real desk power without committing to a full stack.
Fosi Audio SK02 key specs
DAC chip: ESS ES9038Q2M
Input: USB-C
Outputs: 3.5mm single-ended, 4.4mm balanced
Output power: Up to 755mW at 32 ohms
Formats: PCM up to 32-bit/384kHz, DSD256
Preamp output: 3.5mm line out
Genuine Fosi Audio stock. Free shipping on every order, 45-day returns, 1-year warranty.
Fosi Audio SK02 vs similar options
vs Fosi Audio K5 PRO: Built for consoles and PCs: USB-C, optical and coaxial inputs, a mic passthrough and bass/treble knobs, with 24-bit/192kHz decoding. Pick the SK02 for PCM 32-bit/384kHz and DSD256.
vs SMSL DS200: Uses a CS43131 DAC and XU316 USB interface and also accepts Bluetooth 5.1, so a phone can stream to it; both have 3.5mm single-ended and 4.4mm balanced outputs.
vs FiiO K11: Rated 1,400mW×2 @32Ω from its 4.4mm jack versus the SK02's up to 755mW at 32 ohms, and takes optical and coax as well as USB-C; both decode PCM 32-bit/384kHz and DSD256.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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