The SMSL SU-1 is a compact Hi-Res desktop DAC that pairs an AK4493S converter with an XMOS XU316 USB interface, decoding MQA and MQA-CD and handling PCM to 768kHz/32bit plus DSD512. It is DAC-only, for listeners who already own a headphone amplifier or active monitors and want a small, well-specified source.
Who the SMSL SU-1 is for
Headphone amp owners: As a DAC only, it puts a clean, well-specified source in front of the amplifier you already have.
Active monitor desks: It sits in front of active monitors as a small, dedicated source.
Two-box upgraders: Keeping the DAC and amp separate lets you upgrade either half independently later.
Tight desks: Its small footprint fits where a full-width chassis simply won't.
Skip it if: you want to plug headphones straight into it; the SU-1 is a DAC only, so it needs a separate amplifier or active monitors.
SMSL SU-1 key specs
DAC chip: AK4493S
USB interface: XMOS XU316
PCM: Up to 768kHz/32bit
DSD: DSD512
Decoding: MQA and MQA-CD
Type: DAC only (no headphone amplifier)
SMSL SU-1 vs similar options
vs SMSL SU-2: Same SU line, but built on an ES9039Q2M with OPA1612A op-amps instead of the SU-1's AK4493S, and it costs more; choose the SU-1 as the line's cheaper entry point.
vs Douk Audio P1: Puts a tube preamp stage and a 3.5 mm headphone output alongside its USB DAC; the SU-1 is DAC-only, the better fit if you already own an amp or active monitors.
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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