SoundPath Lab · Verified product profile
SMSL SU-1
Compact USB-powered DAC with USB, optical and coaxial inputs plus RCA output.
Verified data
Category-specific specifications
| Brand | SMSL |
|---|---|
| Model | SU-1 |
| Product category | DAC |
| DAC | AKM AK4493S |
| USB interface | XMOS XU-316 |
| Maximum PCM | Up to 32-bit/768 kHz |
| Maximum DSD | Up to DSD512 |
| Power | USB-powered |
Unknown fields are not treated as supported. Services, firmware behavior and regional availability may change after the checked date.
System fit
Best for / not ideal for
Best for
- Low-cost desktop DAC use
- USB-powered installations
- RCA amplifier or powered-speaker systems
Not ideal for
- Balanced-output systems
- Headphone use without an amplifier
- Input switching with Bluetooth
SoundPath verdict
What matters beyond the spec sheet
Strengths
- Dense category-appropriate connectivity
- Official model-level technical specification
Weaknesses
- App, support and long-term ownership evidence remains limited
Biggest limitation
It has no volume-controlled headphone or balanced output.
Best alternative
TOPPING E70 VELVET for balanced preamplifier output.
Best-value use case
Low-cost desktop DAC use
Knowledge graph
Reviews, comparisons, guides and risks
Reviews & explainers
No dedicated review is published yet.
Comparisons
No dedicated comparison is published yet.
Guides
Problems & risks
Firmware
Latest known software status
- Latest known version
- See official support page / tracker
- Updated
- Not separately verified
- Last checked
- 2026-08-23
- Notes
- No separate current version was verified. Check the exact model and hardware revision on the official support page before updating.
Purchase verification
Available channels
Official channel is listed first. No unverified marketplace or variant link is included.
Member knowledge · editor reviewed
Questions, owner experience and product issues
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