FiiO BR15chat_bubble_outlineFrom real comments

Exceptional value that outperforms similarly priced and even pricier DACs. Multiple commenters directly compared the BR15 to FiiO's own K13 R2R and to the Schiit Mimir, concluding the BR15 offers better or comparable sound quality with more features like adjustable NOS filters, EQ, and DDC capability, all around $200. Several users returned the K13 after auditioning both, or paired the BR15 with a separate headphone amp for similar total cost. This repeated favorable comparison against more expensive competitors is a recurring theme across the comments.

Sound quality improves noticeably with a better power supply. Many users report that feeding the BR15 a high-quality external 5V power supply, whether an iFi iPower X, linear supply, or quality USB port, results in shockingly detailed, textured sound with low switching noise. Conversely, cheap or powered USB hub supplies introduce audible switching noise. This power sensitivity is described as a common but manageable upgrade path rather than a flaw.

Preamp use exposes real design flaws around switching and outputs. When used as a preamp, one user found source switching takes a slow five seconds and can cause a connected source like the Wiim Ultra to drop its USB connection entirely, requiring reconfiguration. Others note there's no dedicated line-out mode, only fixed volume workaround, and there's no headphone jack output, meaning owners must rely on other outputs like RCA or XLR for headphones or line-level signal.