The KZ ZS7 ranks #1055 out of 1369 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 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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#1055 KZ ZS7: $49 Discontinued eBay
Pros: About 3 dB more bass than the Harman target below 150 Hz, for listeners who want a fuller low end.
Cons: An uneven response, 2.6 dB standard deviation from target. Discontinued.
Is the KZ ZS7 right for you?
Buy it if
- you like extra bass (about +3 dB below 150 Hz versus the target).
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 26 points.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.59 dB standard deviation |
| Driver Type | Hybrid (1 DD + 4 BA) |
| Drivers | 1 x 10mm dynamic driver + 4 balanced armature drivers (2 x 30095 high + 2 x 29689 mid) |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 40kHz |
| Harman Preference Score | 63 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 105 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.0 dB at 30 Hz) |
| Tonal Tilt | -0.86 (negative is warmer, positive brighter) |
| Weight | 0.1 lbs (26 g) (with cable) |
EQ Presets
Harman target
Set a preamp of -5.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 89 out of 100, up from 63.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.4 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 171 Hz | -4.7 dB | 0.86 |
| Peak | 776 Hz | +1.8 dB | 2.23 |
| Peak | 1,938 Hz | -3.3 dB | 5.03 |
| Peak | 3,041 Hz | +2.6 dB | 4.63 |
| Peak | 5,441 Hz | +5.5 dB | 3.33 |
| Peak | 7,756 Hz | -3.4 dB | 6.00 |
Neutral target
Set a preamp of -5.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 90 out of 100, up from 25.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.0 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 164 Hz | -4.5 dB | 0.75 |
| Peak | 768 Hz | +1.8 dB | 2.12 |
| Peak | 1,939 Hz | -3.3 dB | 5.08 |
| Peak | 3,041 Hz | +2.6 dB | 4.62 |
| Peak | 5,440 Hz | +5.5 dB | 3.32 |
| Peak | 7,756 Hz | -3.4 dB | 6.00 |
Studio flat target
Set a preamp of -4.9 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 86 out of 100, up from 7.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 163 Hz | -6.8 dB | 0.76 |
| Peak | 1,923 Hz | -2.6 dB | 4.99 |
| Peak | 3,011 Hz | +4.9 dB | 3.08 |
| Peak | 5,728 Hz | +4.2 dB | 4.99 |
| Peak | 7,706 Hz | -2.2 dB | 6.00 |
Warm target
Set a preamp of -3.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 86 out of 100, up from 70.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.2 dB | 0.70 |
| High shelf | 10,000 Hz | -1.4 dB | 0.70 |
| Peak | 169 Hz | -4.5 dB | 0.89 |
| Peak | 1,967 Hz | -4.0 dB | 3.87 |
| Peak | 5,772 Hz | +4.1 dB | 5.28 |
| Peak | 7,751 Hz | -4.5 dB | 6.00 |
Bass target
Set a preamp of -5.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 89 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.3 dB | 0.70 |
| High shelf | 10,000 Hz | +1.8 dB | 0.70 |
| Peak | 176 Hz | -4.7 dB | 0.91 |
| Peak | 778 Hz | +1.8 dB | 2.27 |
| Peak | 1,937 Hz | -3.3 dB | 5.01 |
| Peak | 3,041 Hz | +2.6 dB | 4.63 |
| Peak | 5,442 Hz | +5.5 dB | 3.33 |
| Peak | 7,757 Hz | -3.4 dB | 6.00 |
Bright 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 the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 85 out of 100, up from 15.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.0 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 164 Hz | -4.6 dB | 0.74 |
| Peak | 1,931 Hz | -3.3 dB | 4.92 |
| Peak | 3,040 Hz | +2.7 dB | 4.92 |
| Peak | 5,104 Hz | +6.0 dB | 1.88 |
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 the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 84 out of 100, up from 64.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.0 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 166 Hz | -3.4 dB | 0.96 |
| Peak | 1,898 Hz | -3.0 dB | 4.71 |
| Peak | 2,985 Hz | +2.9 dB | 4.95 |
| Peak | 4,988 Hz | +6.0 dB | 1.59 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the KZ ZS7 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 the median of 7 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 7 measurements from the squig.link databases of ankramutt, bassyalexander, eplv, melatonin, musicafe, rg and superreview. Thanks to each of them for publishing their work.