MACH 10
headphones
$330
Used market: $255*
Specifications
3 of 6 values have a recorded sourceExpert Audio Engineering Commentary
Tonal Profile
A single full-range balanced armature — no crossover, no phase splice. It is also the reason the impedance is 80 Ω: one armature coil, undivided.
Amplification Warning
80 Ω from a phone is fine on paper — 103 dB/mW is about 114 dB/V — but a bare armature's impedance is not flat, and this is precisely the load where a high-output-impedance jack changes the tone rather than the level.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
«SENSITIVITY: 103dB @1kHz»
Westone Audio gives a frequency but no reference for sensitivity anywhere in the MACH line. Here the omission is expensive: at 80 Ω, milliwatts and volts are only 11 dB apart — the smallest gap in this batch, because the impedance is unusually high — but the impedance itself is the surprise. 80 Ω in an in-ear monitor is five times the segment norm.
checked 8/5/2026* Estimated with the depreciation fallback (~77% retained value). · checked on 8/5/2026