Short answer: the KBEAR KS1, though neither ranks well in its class. It ranks #1012 of 1291 in-ear headphones by sound quality, rated 2.9/5, at $17.09; the KZ EDX Pro ranks #1057, rated 2.7/5, and costs $17.99, so there is not much of a tradeoff to weigh. Both are rated below 3.0/5 among the 1291 in-ear headphones, so if sound quality matters, consider the Truthear Gate instead, ranked #36 at $21.99.
What the KBEAR KS1 does well: Bass is lifted about 4.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Watch for: An 8.2 dB peak near 7.9 kHz can make cymbals and sibilance sound sharp.
Why pick the KZ EDX Pro: It costs very little and is easy to drive, with 24 ohm impedance and a 112 dB sensitivity rating that suit a phone. The catch: Crinacle’s measurement gives it a preference score of 58, well short of what most listeners prefer.
Buy the KBEAR KS1. It is rated higher for sound quality than the KZ EDX Pro and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
Bass is lifted about 4.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Amazon $17.09 eBay
It costs very little and is easy to drive, with 24 ohm impedance and a 112 dB sensitivity rating that suit a phone.
Amazon $17.99 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
| KBEAR KS1 | KZ EDX Pro | |
|---|---|---|
| Price | $17.09 | $17.99 |
| Ranked | #1012 of 1291 in In-Ear Headphones | #1057 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Impedance | 16 ohms | 24 ohms |
| Sensitivity | 109 dB/mW | 112 dB |
| Frequency Response | 20Hz - 20kHz | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 61 (median of 12 squig.link measurements, calibrated to AutoEQ) | 58 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.92 dB standard deviation | 2.91 dB standard deviation |
| Tonal Tilt | -0.59 (negative is warmer, positive brighter) | -1.10 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.7 dB at 30 Hz) |
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 KBEAR KS1 from aftersound, audioamigo, dchpgall, eplv, hbb, hu-fi, ianfann, jacstone, practiphile, pw, regancipher and vortexreviews; the KZ EDX Pro from achoreviews, aden, aftersound, ankramutt, bassyalexander, eplv, hbb, jacstone, lown-fi, melatonin, obodio, precog, pw, rg, superreview and vortexreviews, all via squig.link.
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