Westone UM3X Review: Ranked #860 of 909

Last updated: October 13, 2026

The Westone UM3X ranks #860 out of 909 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.

Brand: Westone

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Westone UM3X - ranked #860 of 909 In-Ear Headphones · Editor's rating 1.1/5

#860 Westone UM3X Discontinued eBay

Pros: Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural. It uses 3 x balanced armature.

Cons: Discontinued, so it is mainly found used. Presence sits about 13.9 dB low with a 17.9 dB dip near 4.4 kHz, so vocals and instruments lose some bite. Sub-bass is 7.6 dB short at 30 Hz, so deep bass lacks rumble. A Harman score of 38 places it in the lower part of the in-ear rankings.

Released2009 (17 years ago)
ConnectionWired
Deviation From Target4.95 dB standard deviation
Driver TypeBalanced armature
Drivers3 x balanced armature
Form FactorIn-ear
Frequency Response20Hz - 18kHz
Harman Preference Score38 (measured by oratory1990, via AutoEQ)
Impedance56 ohms
Sensitivity124 dB/mW
Sub-bass ExtensionFalls 6 dB below target at 53 Hz (-7.6 dB at 30 Hz)
Tonal Tilt-0.65 (negative is warmer, positive brighter)
EQ preset to match the Harman target

Set a preamp of -6.3 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.

FilterFrequencyGainQ
Low shelf105 Hz+3.5 dB0.70
Peak232 Hz-4.9 dB0.43
Peak2,863 Hz+6.9 dB0.89
Peak1,497 Hz-4.5 dB1.15
Peak5,851 Hz+4.2 dB1.53
High shelf10,000 Hz+1.4 dB0.70
Peak8,086 Hz-1.1 dB4.59
Peak6,778 Hz+0.6 dB6.00
Peak279 Hz+0.2 dB2.37
Peak414 Hz-0.2 dB2.46

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