SMSL SU-1chat_bubble_outlineFrom real comments

Astonishing value against much pricier DACs. Multiple owners directly compared the SU-1 to significantly more expensive gear, including a Pontus 2, Denafrips Ares II, PS Audio, and Bel Canto DACs, and found it startlingly close or even preferable. One buyer said it questioned everything they knew about hifi, while another called it the biggest hifi bargain they'd ever purchased. For $70-80, this level of praise from experienced listeners with high-end systems stands out consistently across many independent comments.

Bass and treble balance divides listeners. Several users noted the SU-1 leans lean or thin on bass, describing it as light on the bottom end, with a forward mid and top that some found flat or lacking body compared to alternatives like the Khadas Tone Board or Bluesound Node. A smaller group reported real fatigue or sibilance, even physical ear pain on revealing monitors. Others, however, heard smooth, non-fatiguing detail for hours, suggesting system pairing matters heavily.

Power supply and cabling meaningfully shape the sound. Owners repeatedly found that swapping the stock USB power for a linear supply, iFi iPower2, or battery source widened the soundstage and improved instrument separation and naturalness. Some also noted differences from mains filters, coax versus USB input, and even slightly lowering volume via remote. This suggests the DAC is revealing enough downstream to respond noticeably to power and source quality upgrades.