The KZ VXS ranks #1047 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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#1047 KZ VXS: $54 Wireless Discontinued eBay
Pros: About 3 dB more bass than the Harman target below 150 Hz, for listeners who want a fuller low end.
Cons: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones. An uneven response, 2.6 dB standard deviation from target. Discontinued.
Is the KZ VXS right for you?
Buy it if
- you like extra bass (about +3 dB below 150 Hz versus the target).
- you are sensitive to bright or sharp treble (treble sits 2.0 dB below 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.
| Active Noise Cancelling | No |
|---|---|
| Back | Closed |
| Battery Life | 5 hours (earbuds), 25 hours (with charging case) |
| Bluetooth Codecs | aptX, AAC, SBC |
| Bluetooth Version | 5.2 |
| Connection | Wireless |
| Deviation From Target | 2.57 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic driver (composite molecular diaphragm) |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz |
| Harman Preference Score | 63 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.2 dB at 30 Hz) |
| Tonal Tilt | -1.01 (negative is warmer, positive brighter) |
| Weight | 0 lbs (4.5 g) (per earbud) |
EQ Presets
Harman target
Set a preamp of -4.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 63.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.1 dB | 0.70 |
| High shelf | 10,000 Hz | -2.1 dB | 0.70 |
| Peak | 124 Hz | -4.7 dB | 1.21 |
| Peak | 2,189 Hz | +3.1 dB | 4.77 |
| Peak | 5,345 Hz | +3.6 dB | 0.80 |
| Peak | 7,759 Hz | -2.2 dB | 6.00 |
Neutral target
Set a preamp of -4.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 90 out of 100, up from 24.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.6 dB | 0.70 |
| High shelf | 10,000 Hz | -2.1 dB | 0.70 |
| Peak | 118 Hz | -4.8 dB | 1.07 |
| Peak | 2,188 Hz | +3.0 dB | 4.79 |
| Peak | 5,345 Hz | +3.6 dB | 0.78 |
| Peak | 7,762 Hz | -2.2 dB | 6.00 |
Studio flat target
Set a preamp of -5.3 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 89 out of 100, up from 5.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +1.5 dB | 0.70 |
| Peak | 132 Hz | -6.3 dB | 0.87 |
| Peak | 1,209 Hz | -1.7 dB | 2.61 |
| Peak | 2,526 Hz | +5.3 dB | 1.48 |
| Peak | 5,787 Hz | +3.7 dB | 4.31 |
Warm target
Set a preamp of -3.4 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 92 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.9 dB | 0.70 |
| High shelf | 10,000 Hz | -5.8 dB | 0.70 |
| Peak | 121 Hz | -4.7 dB | 1.33 |
| Peak | 2,196 Hz | +3.0 dB | 4.14 |
| Peak | 5,739 Hz | +3.9 dB | 3.81 |
| Peak | 8,000 Hz | -2.7 dB | 6.00 |
Bass target
Set a preamp of -4.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 89 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.7 dB | 0.70 |
| High shelf | 10,000 Hz | -2.1 dB | 0.70 |
| Peak | 125 Hz | -4.7 dB | 1.25 |
| Peak | 2,189 Hz | +3.1 dB | 4.76 |
| Peak | 5,345 Hz | +3.6 dB | 0.80 |
| Peak | 7,758 Hz | -2.2 dB | 6.00 |
Bright target
Set a preamp of -5.3 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 86 out of 100, up from 13.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.7 dB | 0.70 |
| High shelf | 10,000 Hz | +1.2 dB | 0.70 |
| Peak | 119 Hz | -4.8 dB | 1.06 |
| Peak | 2,195 Hz | +2.8 dB | 5.38 |
| Peak | 4,712 Hz | +5.1 dB | 0.91 |
V-shaped 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 84 out of 100, up from 63.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.3 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 115 Hz | -4.0 dB | 1.77 |
| Peak | 1,172 Hz | -2.1 dB | 2.77 |
| Peak | 2,205 Hz | +2.9 dB | 6.00 |
| Peak | 4,425 Hz | +5.2 dB | 0.81 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the KZ VXS 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 5 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 5 measurements from the squig.link databases of aftersound, dhrme, ducbloke, ianfann and vortexreviews. Thanks to each of them for publishing their work.