SMSL D6Schat_bubble_outlineFrom real comments

The adjustable PCM filters and DPLL settings are a genuine differentiator for tinkerers. Multiple owners report the D6S's filter and jitter settings produce clearly audible changes in decay structure, imaging, clarity, and sound blackness once test tracks and proper listening effort are applied. One user needed time to understand each filter's effect but found lowering the DPLL setting helpful. This tunability lets listeners dial in a preferred dynamic, resolving character rather than accepting a single fixed sound.

Many upgraders hear a real step up in dynamics and detail over older or cheaper gear. Buyers moving from a Musical Fidelity DAC, a Squeezebox Touch's internal DAC, an SMSL M500 MKII with a crackling fault, or a plain PC headphone jack describe the D6S as remarkably dynamic, revealing, deep, punchy, and well-controlled once paired with a capable amp and speakers. One reported near-flagship enjoyment at a fraction of his reference system's cost, suggesting strong value when properly matched downstream.

A vocal minority finds the sound harsh, lifeless, or simply not to their taste. One long-time user called it rubbish outright, citing lost dynamics, boomy bass, and nervous-sounding voices versus an older Musical Fidelity DAC he ultimately kept instead. Others returned it after only days, describing harsh, artificial treble or general ESS Sabre fatigue they'd experienced before with a similar chip. The inability to fully disable volume control also bothered someone wanting a pure, preamp-free DAC.