The KZ ZSX ranks #218 out of 297 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: KZ
Prices on this page were last checked October 10, 2026 at 5:37 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.
#218 KZ ZSX: $49.99 Linsoul eBay
Pros: A one dynamic plus five balanced armature hybrid at a budget price, with sub-bass within 1 dB of target and midbass about 2.4 dB above it, so electronic and hip hop tracks get punchy, full lows. Its 24 ohm, 111 dB rating means it plays loud straight from a phone, and it rates higher than the pricier BGVP DN3.
Cons: Across eight hobbyist measurements on squig.link a 10 dB peak near 11.9 kHz stands out, which can make cymbals and hi hats sound splashy and tizzy, while a 6.8 dB dip near 6.5 kHz leaves the treble uneven. The KZ ZS10 Pro from the same maker rates noticeably higher for slightly less money.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.73 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 5 balanced armature) |
| Drivers | 1 x dynamic + 5 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 65 (measured by crinacle, via AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 111 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -5.6 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.6 dB | 0.70 |
| Peak | 162 Hz | -3.8 dB | 0.64 |
| Peak | 7,279 Hz | +5.8 dB | 1.94 |
| Peak | 732 Hz | +2.9 dB | 1.14 |
| Peak | 2,111 Hz | -4.3 dB | 2.80 |
| High shelf | 10,000 Hz | -5.5 dB | 0.70 |
| Peak | 9,793 Hz | +3.2 dB | 2.14 |
| Peak | 3,249 Hz | +3.3 dB | 4.13 |
| Peak | 5,021 Hz | -2.2 dB | 6.00 |
| Peak | 2,553 Hz | -1.2 dB | 2.76 |
- Reviews, Comparisons and Sound Samples