The KZ ZSX Pro ranks #544 out of 1476 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 20, 2026 at 10:35 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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#544 KZ ZSX Pro: $58.99 Amazon $58.99 eBay
Pros: A hybrid IEM with one dynamic and five balanced armatures at about $59, with a preference score of 73. Everything up to 8 kHz stays within about 2 dB of target, so mids are clean and natural.
Cons: A 13.2 dB peak near 8.2 kHz and a 6.8 dB peak near 10.9 kHz make it bright and prone to sibilance. Bass is 1.7 to 1.8 dB light, and the score rests on a single measurement.
Is the KZ ZSX Pro right for you?
Buy it if
- you are happy to use EQ: our preset lifts its Harman match by about 15 points.
Skip it if
- you want the best value: the higher-rated QCY HT05 MeloBuds ANC costs about $25 less.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.20 dB standard deviation |
| Driver Type | Hybrid (dynamic + balanced armature) |
| Drivers | 1 x dynamic + 5 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 73 (1 squig.link measurement, calibrated to AutoEQ) |
| Impedance | 19 ohms |
| Sensitivity | 103 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.7 dB at 30 Hz) |
| Tonal Tilt | +0.55 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -3.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.7 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 229 Hz | -1.2 dB | 1.47 |
| Peak | 3,013 Hz | -2.8 dB | 6.00 |
| Peak | 4,041 Hz | +1.9 dB | 6.00 |
| Peak | 5,868 Hz | +4.9 dB | 6.00 |
| Peak | 7,728 Hz | -5.0 dB | 6.00 |
Neutral target
Set a preamp of -3.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 89 out of 100, up from 57.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -6.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 23 Hz | -1.0 dB | 2.11 |
| Peak | 205 Hz | -1.1 dB | 1.00 |
| Peak | 3,013 Hz | -2.8 dB | 6.00 |
| Peak | 4,041 Hz | +1.9 dB | 6.00 |
| Peak | 5,867 Hz | +4.9 dB | 6.00 |
| Peak | 7,728 Hz | -5.0 dB | 6.00 |
Studio flat target
Set a preamp of -2.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 89 out of 100, up from 42.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.4 dB | 0.70 |
| Peak | 199 Hz | -2.9 dB | 0.87 |
| Peak | 2,320 Hz | +2.3 dB | 3.88 |
| Peak | 5,929 Hz | +2.6 dB | 6.00 |
| Peak | 7,604 Hz | -5.9 dB | 6.00 |
Warm target
Set a preamp of -2.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 86 out of 100, up from 64.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.0 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 226 Hz | -0.9 dB | 1.93 |
| Peak | 3,006 Hz | -4.0 dB | 3.48 |
| Peak | 5,937 Hz | +2.4 dB | 6.00 |
| Peak | 7,577 Hz | -9.0 dB | 6.00 |
Bass target
Set a preamp of -6.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 89 out of 100, up from 57.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 48 Hz | +0.7 dB | 1.58 |
| Peak | 233 Hz | -1.2 dB | 1.60 |
| Peak | 3,013 Hz | -2.8 dB | 6.00 |
| Peak | 4,041 Hz | +1.9 dB | 6.00 |
| Peak | 5,868 Hz | +4.9 dB | 6.00 |
| Peak | 7,727 Hz | -5.0 dB | 6.00 |
Bright target
Set a preamp of -5.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 88 out of 100, up from 51.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -6.8 dB | 0.70 |
| High shelf | 10,000 Hz | -2.5 dB | 0.70 |
| Peak | 23 Hz | -1.0 dB | 2.00 |
| Peak | 202 Hz | -1.1 dB | 0.92 |
| Peak | 3,025 Hz | -2.3 dB | 6.00 |
| Peak | 4,060 Hz | +2.7 dB | 6.00 |
| Peak | 5,542 Hz | +6.0 dB | 3.17 |
| Peak | 7,751 Hz | -3.3 dB | 6.00 |
V-shaped target
Set a preamp of -6.2 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from a single measurement from squig.link, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 87 out of 100, up from 62.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.9 dB | 0.70 |
| High shelf | 10,000 Hz | -0.9 dB | 0.70 |
| Peak | 101 Hz | +0.8 dB | 0.55 |
| Peak | 1,259 Hz | -1.0 dB | 4.60 |
| Peak | 3,060 Hz | -1.8 dB | 6.00 |
| Peak | 3,998 Hz | +2.1 dB | 6.00 |
| Peak | 5,345 Hz | +5.6 dB | 2.24 |
| Peak | 7,757 Hz | -2.7 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the KZ ZSX Pro measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is a single measurement, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: a single measurement from the squig.link database of boizoff. Thanks to them for publishing their work.