Short answer: both are discontinued, and they are rated the same for sound quality, though neither ranks well in its class. (#865 and #905 of 909 in-ear headphones). Either one is only an option used, so choose on condition and price. Both are rated below 3.0/5 among the 909 in-ear headphones; for better sound, the ThieAudio Monarch MKIII ranks #1 at $999.
Why pick the Westone UM Pro 10: It uses 1 x balanced armature with an easy 25 ohm load. The catch: Discontinued, so it is mainly found used.
The case for the Westone UM Pro 20: It uses 2 x balanced armature with an easy 27 ohm load. The catch: Discontinued, so it is mainly found used.
Buy the Westone UM Pro 10 or the Westone UM Pro 20, whichever you find used in better condition; both are discontinued. For a new speaker, start with the ThieAudio Monarch MKIII instead.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| Westone UM Pro 10 | Westone UM Pro 20 | |
|---|---|---|
| Price | Discontinued | Discontinued |
| Ranked | #865 of 909 in In-Ear Headphones | #905 of 909 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Balanced armature |
| Drivers | 1 x balanced armature | 2 x balanced armature |
| Impedance | 25 ohms | 27 ohms |
| Sensitivity | 114 dB/mW | 119 dB/mW |
| Frequency Response | 20Hz - 16kHz | 20Hz - 18kHz |
| Harman Preference Score | 36 (measured by crinacle, via AutoEQ) | 17 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 4.79 dB standard deviation | 5.97 dB standard deviation |
| Tonal Tilt | -0.86 (negative is warmer, positive brighter) | -1.99 (negative is warmer, positive brighter) |
| Weight | - | 0 lbs (12.7 g) |
Related Headphone Comparisons
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- Westone UM Pro 10 vs Westone UM Pro 30
- Westone UM Pro 10 vs Westone UM Pro 50
- Westone UM Pro 20 vs Westone UM Pro 30
- Westone UM Pro 20 vs Westone UM Pro 50
- Campfire Audio Dorado 2020 vs Westone Pro X50
Prices on this page were last checked October 13, 2026 at 3:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Headphones In Full
Westone UM Pro 10 Discontinued eBay
Pros: It uses 1 x balanced armature with an easy 25 ohm load.
Cons: Discontinued, so it is mainly found used. Its 4.79 dB spread from the target means a noticeably uneven response. A Harman score of 36 places it in the lower part of the in-ear rankings.
Full Westone UM Pro 10 review and specifications →
| Released | 2013 (13 years ago) |
|---|---|
| Connection | Wired |
| Deviation From Target | 4.79 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 16kHz |
| Harman Preference Score | 36 (measured by crinacle, via AutoEQ) |
| Impedance | 25 ohms |
| Sensitivity | 114 dB/mW |
| Tonal Tilt | -0.86 (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.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +3.4 dB | 0.70 |
| Peak | 278 Hz | -4.9 dB | 0.39 |
| Peak | 6,389 Hz | +6.3 dB | 0.22 |
| Peak | 1,445 Hz | -4.6 dB | 1.36 |
| Peak | 157 Hz | -0.4 dB | 2.24 |
| High shelf | 10,000 Hz | +1.7 dB | 0.70 |
| Peak | 8,987 Hz | -0.6 dB | 1.59 |
| Peak | 67 Hz | +0.2 dB | 3.31 |
| Peak | 4,585 Hz | +0.4 dB | 6.00 |
| Peak | 3,968 Hz | -0.3 dB | 5.52 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Westone UM Pro 20 Discontinued eBay
Pros: It uses 2 x balanced armature with an easy 27 ohm load.
Cons: Discontinued, so it is mainly found used. A tonal tilt of -1.99 makes it sound dark, with bass well ahead of the treble. Its 5.97 dB spread from the target means a noticeably uneven response. A Harman score of 17 places it in the lower part of the in-ear rankings.
Full Westone UM Pro 20 review and specifications →
| Released | 2013 (13 years ago) |
|---|---|
| Connection | Wired |
| Deviation From Target | 5.97 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 2 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 18kHz |
| Harman Preference Score | 17 (measured by crinacle, via AutoEQ) |
| Impedance | 27 ohms |
| Sensitivity | 119 dB/mW |
| Tonal Tilt | -1.99 (negative is warmer, positive brighter) |
| Weight | 0 lbs (12.7 g) |
EQ preset to match the Harman target
Set a preamp of -7.2 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.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -0.5 dB | 0.70 |
| Peak | 234 Hz | -7.8 dB | 0.44 |
| Peak | 3,522 Hz | +6.7 dB | 0.30 |
| Peak | 1,460 Hz | -3.6 dB | 1.68 |
| Peak | 10,000 Hz | +2.8 dB | 4.62 |
| High shelf | 10,000 Hz | +4.7 dB | 0.70 |
| Peak | 9,581 Hz | -2.9 dB | 5.72 |
| Peak | 71 Hz | +0.5 dB | 1.90 |
| Peak | 142 Hz | -0.6 dB | 1.70 |
| Peak | 251 Hz | +0.3 dB | 1.70 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons