Short answer: the KBEAR Pecker, though neither ranks well in its class. It ranks #1023 of 1291 in-ear headphones by sound quality, rated 2.9/5, at $34. The KZ ZEX ranks #1034, rated 2.8/5, at $28.99, $5.01 cheaper, which does not close the gap in sound quality. Both are rated below 3.0/5 among the 1291 in-ear headphones, so if sound quality matters, consider the Intuaura Reference 2019 instead, ranked #7 at $34.99.
The case for the KBEAR Pecker: Bass is lifted about 3.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Watch for: Presence sits about 3.1 dB low with a 7.7 dB dip near 11.9 kHz, so vocals and instruments lose some bite.
What the KZ ZEX does well: It pairs a 10mm dynamic driver with a 6.8mm electrostatic driver at a low price, and its 25 ohm load suits phones and dongles. The catch: Across 16 hobbyist measurements a 7.4 dB dip near 3.3 kHz pushes vocals back and a 6.1 dB peak near 10.2 kHz adds sizzle to cymbals, while sub-bass sits about 3.7 dB below target under 60 Hz.
Buy the KBEAR Pecker. It is rated higher for sound quality, and saving $5.01 with the KZ ZEX does not make up for the sound-quality gap.
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Bass is lifted about 3.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
KeepHiFi $34.00 eBay
It pairs a 10mm dynamic driver with a 6.8mm electrostatic driver at a low price, and its 25 ohm load suits phones and dongles.
Amazon $28.99 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 Pecker | KZ ZEX | |
|---|---|---|
| Price | $34.00 | $28.99 |
| Ranked | #1023 of 1291 in In-Ear Headphones | #1034 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid (1 dynamic + 1 electrostatic) |
| Drivers | 1 x 10mm dynamic + 2 x balanced armature | 1 x 10mm dynamic + 1 x 6.8mm electrostatic |
| Impedance | 16 ohms | 25 ohms |
| Harman Preference Score | 60 (median of 10 squig.link measurements, calibrated to AutoEQ) | 59 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 3.11 dB standard deviation | 3.54 dB standard deviation |
| Tonal Tilt | -0.53 (negative is warmer, positive brighter) | -0.09 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.7 dB at 30 Hz) |
| Frequency Response | - | 20Hz - 40kHz (Manufacturer specified) |
| Sensitivity | - | 103 dB |
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 Pecker from audioamigo, cammyfi, hobbytalk, hore, ianfann, mmagtech, practiphile, pw, therollo9 and vortexreviews; the KZ ZEX from achoreviews, ankramutt, bryaudioreviews, gadgetrytech, hbb, ianfann, iemworld, jacstone, jaytiss, melatonin, precog, pw, superreview, suporsalad, tgx78 and vortexreviews, all via squig.link.
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