Short answer: the DUNU Zen Pro. Both are rated 3.4/5 for sound quality (#873 and #903 of 1369 in-ear headphones), and the DUNU Zen Pro costs $899.99 against $1,919 for the Unique Melody MEST MKIII, and with sound quality even, the cheaper one is the better buy.
What the DUNU Zen Pro does well: A single dynamic driver with bass, low mids and upper mids all within half a dB of target in squig.link’s hobbyist measurements, so voices and instruments keep a natural, even body. Watch for: An 8.3 dB dip near 6.4 kHz and a 4 dB shortfall across 3 to 10 kHz dull cymbals and blunt the edge of vocals, while a 4.6 dB peak near 11.5 kHz adds a little uneven sparkle.
The case for the Unique Melody MEST MKIII: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the DUNU Zen Pro. Both are rated the same for sound quality, and it costs $1,019.01 less than the Unique Melody MEST MKIII.
Want more options? Browse the full Headphones rankings.
A single dynamic driver with bass, low mids and upper mids all within half a dB of target in squig.link’s hobbyist measurements, so voices and instruments keep a natural, even body.
HiFiGo $899.99 eBay
A broadly balanced tuning with a preference score of 66 against the Harman target.
MusicTeck $1,919.00 eBayPrices on this page were last checked October 17, 2026 at 6:04 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| DUNU Zen Pro | Unique Melody MEST MKIII | |
|---|---|---|
| Price | $899.99 | $1,919.00 |
| Ranked | #873 of 1369 in In-Ear Headphones | #903 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 66 (measured by crinacle, via AutoEQ) | 66 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.11 dB standard deviation | 2.64 dB standard deviation |
| Tonal Tilt | -0.11 (negative is warmer, positive brighter) | -0.63 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Quadbrid |
| Impedance | 16 ohms | 14 ohms |
| Sensitivity | 112 dB | 104 dB |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) | 20Hz - 70kHz |
| Built-in Microphone | No | - |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.3 dB at 30 Hz) |
| Drivers | - | 10 drivers (1 dynamic driver + 4 balanced armatures + 4 electrostatic + 1 bone conduction driver) |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the DUNU Zen Pro from aden, aftersound, ankramutt, bukanaudiophile, ekaudio, joshtbvo, kazi, koi, musicafe, nymz, precog, superreview, tedthepraimortis, tgx78 and vsg; the Unique Melody MEST MKIII from aden, dl, harutohiroki, hbb, kazi, musicafe, practiphile and precog, all via squig.link.
Related Headphone Comparisons
More worthwhile head-to-heads for DUNU Zen Pro: