Questyle M15C.
The M15C pairs a Cirrus Logic CS43198 DAC with Questyle's current-mode amplification and both 3.5mm and balanced 4.4mm outputs — driving full-size headphones from a USB-C port.
The Verdict.
Gavler Meta-Score
“The M15C proves Questyle's current-mode amplification scales down without losing its character — and the Cirrus CS43198 gives it a warmer, more forgiving voice than the ESS-based M15i. Add a balanced 4.4mm output and a manual gain switch in a flash-drive-sized body, and it is one of the easiest premium dongles to recommend for IEMs and efficient headphones. Just know the warm tuning trades some outright detail for smoothness.”
The Gavler Verdict
Precision Engineering
Current Mode Amplification
Questyle's patented current-mode SiP modules operate on current rather than voltage for lower distortion and faster, more natural transients.
Balanced 4.4mm + Manual Gain
Both a 3.5mm single-ended and a 4.4mm balanced output, plus a manual two-level gain switch — a rare pairing in a dongle this small.
Cirrus CS43198 DAC
PCM up to 384kHz/32-bit and DSD256 with a warm, forgiving voicing that smooths over bright or poorly mastered tracks.
Technical Specifications
The Scoreboard
Experts praise the current-mode technology and the rare balanced-out-plus-manual-gain combo at this price. The main trade-off is the warm, smooth CS43198 voicing, which tones down outright detail versus the cooler ESS-based M15i. Battery drain on phones and occasionally uneven QC are the recurring nitpicks.
Cast Your Vote
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Best Price Availability.
Prices checked April 2026
Price History
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Global Critique
“The M15c could accurately be described as being the 'polite' model with a greater degree of warmth to its overall sonic signature, and that includes smoothing over rough edges in poor recordings.”
“If you are after a warmer, smoother, more forgiving sound, the M15c is your best option from their existing series of portable headphone amplifiers.”
“It was impressive to see how the less expensive M15c was rather competent with a wide range of headphones and IEMs.”
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