The KZ ZST ranks #33 out of 68 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: KZ
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#33 KZ ZST: $21.99 Amazon eBay
Pros: In oratory1990’s measurement the preference score is 70, with bass about 2.3 dB above target from 60 to 200 Hz for extra warmth and punch, and sub-bass tracking the target within 0.1 dB. The low mids and upper mids stay within about 1 dB, so vocals and instruments sit naturally. The warm and bassy profiles fit it best, and the hybrid pairing of one dynamic and one balanced armature driver costs very little.
Cons: A 9.4 dB dip near 4.4 kHz and 3.7 dB lower presence from 3 to 6 kHz pull back vocal clarity and the attack of snares and guitars. Above 10 kHz the response runs about 6.5 dB hot, with a 10 dB peak near 11 kHz that adds sharpness to cymbals. The TANGZU Wan’er S.G rates higher.
| Released | 2016 (10 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.31 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 70 (measured by oratory1990, via AutoEQ) |
| Tonal Tilt | -0.47 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.5 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 | -0.2 dB | 0.70 |
| Peak | 182 Hz | -3.0 dB | 0.62 |
| Peak | 620 Hz | +2.4 dB | 0.63 |
| Peak | 9,298 Hz | -3.1 dB | 3.37 |
| Peak | 1,878 Hz | -4.1 dB | 3.05 |
| High shelf | 10,000 Hz | -0.3 dB | 0.70 |
| Peak | 4,253 Hz | +4.7 dB | 4.05 |
| Peak | 1,321 Hz | -0.6 dB | 2.60 |
| Peak | 3,462 Hz | -1.0 dB | 6.00 |
| Peak | 358 Hz | -0.0 dB | 5.65 |
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