Short answer: the KZ ZNA. It ranks #1049 of 1369 in-ear headphones by sound quality, rated 3.1/5, at $22; the KBEAR KS2 ranks #1079, rated 3.0/5, and costs $24.99, which makes this an easy call rather than a real tradeoff.
Why pick the KZ ZNA: About 4 dB more bass than the Harman target below 150 Hz, for listeners who want a fuller low end. The catch: An uneven response, 2.6 dB standard deviation from target.
What the KBEAR KS2 does well: Bass is lifted about 5.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The tradeoff: A 10.1 dB peak near 7.9 kHz can make cymbals and sibilance sound sharp.
Buy the KZ ZNA. It is rated higher for sound quality than the KBEAR KS2 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Headphones rankings.
About 4 dB more bass than the Harman target below 150 Hz, for listeners who want a fuller low end.
Linsoul $22 eBay
Bass is lifted about 5.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Amazon $24.99 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.
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Specifications Side By Side
| KZ ZNA | KBEAR KS2 | |
|---|---|---|
| Price | $22 | $24.99 |
| Ranked | #1049 of 1369 in In-Ear Headphones | #1079 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 63 (median of 8 squig.link measurements, calibrated to AutoEQ) | 61 (median of 11 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.65 dB standard deviation | 2.66 dB standard deviation |
| Tonal Tilt | -0.86 (negative is warmer, positive brighter) | -0.67 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+3.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+4.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 DD + 1 BA) | Hybrid |
| Drivers | 1 x 12mm dual-cavity dynamic driver + 1 x 30095 balanced armature driver | 1 x 10mm dynamic + 1 x balanced armature |
| Impedance | 34 ohms | 16 ohms |
| Sensitivity | 112 dB | - |
| Frequency Response | 20Hz - 40kHz | 20Hz - 20kHz |
| Weight | 0.1 lbs (59 g) (with cable) | - |
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 ZNA from ankramutt, gadgetrytech, hore, ianfann, musicafe, practiphile, pw and vortexreviews; the KBEAR KS2 from aftersound, bedrock, bryaudioreviews, cqtek, dchpgall, hbb, ianfann, pw, rg, superreview and vortexreviews, all via squig.link.
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