Short answer: a tie on sound quality. Both are rated 3.8/5 (#546 and #611 of 1291 in-ear headphones) at nearly the same price ($15.99 vs $16.99), so choose on features and fit.
What the KZ EDX does well: The median of 14 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.96 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural. Watch for: An 8.2 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
What the TRN MT4 Pro does well: A broadly balanced tuning with a preference score of 71 against the Harman target. The tradeoff: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the KZ EDX or the TRN MT4 Pro on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
The median of 14 hobbyist measurements gives it a solid Harman preference score of 72 with a 1.96 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural.
Amazon $15.99 eBay
A broadly balanced tuning with a preference score of 71 against the Harman target.
Amazon $16.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| KZ EDX | TRN MT4 Pro | |
|---|---|---|
| Price | $15.99 | $16.99 |
| Ranked | #546 of 1291 in In-Ear Headphones | #611 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 72 (median of 14 squig.link measurements, calibrated to AutoEQ) | 71 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.96 dB standard deviation | 2.05 dB standard deviation |
| Tonal Tilt | -0.41 (negative is warmer, positive brighter) | -0.64 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dual Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic + 1 x 6mm dynamic |
| Impedance | 23 ohms | - |
| Sensitivity | 112 dB/mW | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | - |
| Built-in Microphone | No | - |
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 KZ EDX from achoreviews, aftersound, ankramutt, dchpgall, eplv, jacstone, lown-fi, melatonin, musicafe, pw, scboy, soundignity, therollo9 and vortexreviews; the TRN MT4 Pro from ankramutt, eplv, pw, scboy and soundcheck39, all via squig.link.
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