The KZ Carol ranks #547 out of 1061 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 15, 2026 at 5:41 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.
#547 KZ Carol: $35.99 TWS Amazon $35.99 eBay
Pros: Budget true wireless earbuds with hybrid noise cancelling and Bluetooth 5.4, about 7 hours per charge and 42 hours with the case. Measurements show treble right on the Harman target (score 70 across nine measurements).
Cons: A 2.37 dB spread from the target shows peaks and dips that better tuned sets avoid.
Is the KZ Carol right for you?
Buy it if
- you want sub-bass rumble that reaches down to 20 Hz.
- you want noise cancelling for commutes or flights.
- you are happy to use EQ: our preset lifts its Harman match by about 18 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $12 less.
| Released | 2024 (2 years ago) |
|---|---|
| Active Noise Cancelling | Yes |
| Back | Closed |
| Bluetooth Version | 5.4 |
| Connection | True wireless |
| Deviation From Target | 2.37 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 70 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.8 dB at 30 Hz) |
| Tonal Tilt | -0.23 (negative is warmer, positive brighter) |
EQ Presets
Harman 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 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 88 out of 100, up from 70.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.4 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 23 Hz | +3.3 dB | 1.70 |
| Peak | 118 Hz | -5.5 dB | 0.91 |
| Peak | 182 Hz | +1.7 dB | 6.00 |
| Peak | 283 Hz | -1.1 dB | 0.70 |
| Peak | 3,893 Hz | +2.1 dB | 0.80 |
Neutral 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 the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 92 out of 100, up from 40.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.2 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 23 Hz | +2.9 dB | 1.92 |
| Peak | 115 Hz | -5.7 dB | 0.87 |
| Peak | 182 Hz | +1.7 dB | 6.00 |
| Peak | 424 Hz | -1.5 dB | 1.21 |
| Peak | 3,893 Hz | +2.1 dB | 0.79 |
Studio flat 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 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 96 out of 100, up from 22.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.7 dB | 0.70 |
| Peak | 23 Hz | +2.6 dB | 2.02 |
| Peak | 110 Hz | -0.9 dB | 2.75 |
| Peak | 137 Hz | -6.4 dB | 0.66 |
| Peak | 185 Hz | +2.4 dB | 6.00 |
| Peak | 452 Hz | -1.5 dB | 1.51 |
| Peak | 2,501 Hz | +4.0 dB | 1.35 |
| Peak | 4,091 Hz | +1.2 dB | 6.00 |
| Peak | 6,320 Hz | -0.8 dB | 2.16 |
Warm target
Set a preamp of -3.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 88 out of 100, up from 73.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.6 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 23 Hz | +3.3 dB | 1.73 |
| Peak | 115 Hz | -5.5 dB | 0.99 |
| Peak | 8,000 Hz | -3.3 dB | 3.09 |
Bass target
Set a preamp of -6.4 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 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 89 out of 100, up from 65.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +3.9 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 25 Hz | +2.7 dB | 1.43 |
| Peak | 121 Hz | -5.3 dB | 0.95 |
| Peak | 182 Hz | +1.6 dB | 6.00 |
| Peak | 283 Hz | -1.1 dB | 0.69 |
| Peak | 3,894 Hz | +2.1 dB | 0.81 |
Bright 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 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 94 out of 100, up from 30.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.2 dB | 0.70 |
| High shelf | 10,000 Hz | -1.0 dB | 0.70 |
| Peak | 23 Hz | +2.9 dB | 1.93 |
| Peak | 115 Hz | -5.7 dB | 0.86 |
| Peak | 182 Hz | +1.8 dB | 6.00 |
| Peak | 424 Hz | -1.5 dB | 1.23 |
| Peak | 1,988 Hz | +1.6 dB | 4.21 |
| Peak | 3,077 Hz | -1.3 dB | 6.00 |
| Peak | 4,669 Hz | +4.9 dB | 1.06 |
V-shaped 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 Speaker Ranking from the median of 9 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 84 out of 100, up from 66.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.4 dB | 0.70 |
| Peak | 110 Hz | -4.7 dB | 1.30 |
| Peak | 4,576 Hz | +5.5 dB | 1.05 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the KZ Carol 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 9 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 9 measurements from the squig.link databases of aftersound, audioamigo, dhrme, flare, gadgetrytech, obodio, practiphile, pw and regancipher. Thanks to each of them for publishing their work.