Short answer: the KZ EDX. It ranks #546 of 1291 in-ear headphones by sound quality, rated 3.8/5, at $15.99; the KZ EDC Pro ranks #637, rated 3.7/5, at $15.99. The price gap is small enough that the sound-quality ranking should decide it.
Why pick the KZ EDX: 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. The tradeoff: An 8.2 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
Why pick the KZ EDC Pro: Exceptional value: the median of 22 measurements scores 70 on the Harman preference scale with a 2.0 dB spread, unusually even for a budget IEM. Watch for: The bass lift makes it fun rather than neutral, and a 5.6 dB peak near 12 kHz can add sparkle that edges toward sharp on bright recordings.
Buy the KZ EDX. It is rated higher for sound quality than the KZ EDC Pro at the same price, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
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
Exceptional value: the median of 22 measurements scores 70 on the Harman preference scale with a 2.0 dB spread, unusually even for a budget IEM.
Amazon $15.99 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| KZ EDX | KZ EDC Pro | |
|---|---|---|
| Price | $15.99 | $15.99 |
| Ranked | #546 of 1291 in In-Ear Headphones | #637 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) | 70 (median of 22 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.96 dB standard deviation | 2.00 dB standard deviation |
| Tonal Tilt | -0.41 (negative is warmer, positive brighter) | -0.80 (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 (+2.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Impedance | 23 ohms | 23.5 ohms |
| Sensitivity | 112 dB/mW | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 20Hz - 40kHz (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 KZ EDC Pro from aftersound, ankramutt, audioamigo, banzai1122, boizoff, doltonius, ducbloke, eplv, fernandagunsan, jacstone, jaytiss, koi, kuping-sensi, lown-fi, musicafe, obodio, pw, scboy, sl0the, soundcheck39, soundignity and therollo9, all via squig.link.
Related Headphone Comparisons
More worthwhile head-to-heads for KZ EDX: