The SMSL SU-X is the flagship desktop DAC of SMSL's SU line, running dual ES9039MSPRO converters behind an XMOS XU-316 USB interface, with PCM to 32bit/768kHz, DSD512, MQA decoding and Bluetooth 5.1. It suits listeners who want one source component to feed a headphone amp, a power amp or a speaker system in another room.
Who the SMSL SU-X is for
Flagship seekers: As the top of SMSL's SU line, it gives each channel its own ES9039MSPRO converter.
Speaker systems in another room: With a remote and Bluetooth 5.1, it works as the digital front end of a speaker system as readily as it does on a desk.
Dedicated-amp setups: Feed it from a computer, a streamer or the PL200T transport, then run it into a balanced headphone amp or a power amp.
Hi-res and MQA libraries: USB playback reaches 32bit/768kHz PCM and DSD512, and MQA decoding is on board.
Skip it if: you want a DAC and headphone amp in one box; the SU-X is a source component meant to feed a separate headphone amp or power amp.
SMSL SU-X key specs
DAC chip: Dual ES9039MSPRO (one per channel)
USB interface: XMOS XU-316
PCM: Up to 32bit/768kHz
DSD: DSD512
MQA: MQA decoding
Bluetooth: Bluetooth 5.1
Remote control: Included
Color: White
SMSL SU-X vs similar options
vs SMSL VMV D2R: From SMSL's flagship VMV line, built on a ROHM BD34301EKV converter instead of ESS silicon; pick the SU-X if you want dual ES9039MSPRO converters, one per channel.
vs SMSL VMV D3R: Also a dual-chip flagship, from SMSL's upper VMV line, but with two ROHM BD34302EKV converters; pick it if you prefer ROHM, or the SU-X for dual ES9039MSPRO.
vs SMSL RAW-DAC1: An AK4499EX-based desktop DAC that also decodes MQA and takes Bluetooth 5.1; pick the SU-X for dual ES9039MSPRO converters, one per channel.
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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