SMSL SH-6chat_bubble_outlineFrom real comments

Long-term owners praise the SH-6's dual role as preamp and headphone amp. Users who have run the SH-6 for extended periods describe its sound character as spot on and call it a highly dynamic match for budget multi-bit DACs. Because the volume knob also governs the line-level RCA output, some buyers found they could feed a power amp directly without a separate preamp stage. This flexibility, combined with reports of reliable daily use over roughly two years, points to a genuinely capable all-in-one desktop unit for budget-conscious listeners.

Channel imbalance and gain noise are the most repeated complaints. Several commenters describe one channel being louder at low volume and the opposite channel louder at high volume, alongside audible noise that varies with gain setting. For some this was an outright deal breaker, with one noting that even cheaper FiiO gear offers digital volume control with better channel balance. Others proposed a manual fix, running a test tone through the unit and adjusting outputs until they matched, implying the issue isn't resolved out of the box.

Cable, grounding, and missing convenience features round out the drawbacks. A couple of buyers ran into physical setup headaches, including reported ground-related static in their headphones and difficulty finding a correctly rated C7 cable for a unit that shipped with a UK plug. Separately, one commenter argued that a remote, 12V trigger in/out, and EQ or tone presets should be considered standard at this price point, suggesting the SH-6 leaves some conveniences on the table compared to pricier or better-equipped alternatives.