Name: KZ Libra
Brand: KZ

The KZ Libra ranks #901 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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KZ Libra - ranked #901 of 1369 In-Ear Headphones · Editor's rating 3.4/5

Check price at KZ Audio (2.00) →

#901 KZ Libra: 2.00 KZ Audio eBay

Pros: A broadly balanced tuning with a preference score of 66 against the Harman target.

Cons: An uneven response, 2.3 dB standard deviation from target.

Is the KZ Libra right for you?

Buy it if

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 23 points.

Back	Closed
Connection	Wired
Deviation From Target	2.28 dB standard deviation
Driver Type	Dynamic
Drivers	1 x 10mm ultra-wideband dynamic driver
Form Factor	In-ear
Frequency Response	20Hz - 40kHz
Harman Preference Score	66 (median of 4 squig.link measurements, calibrated to AutoEQ)
Impedance	25 ohms
Sensitivity	108 dB
Sub-bass Extension	Within 6 dB of target down to 20 Hz (+1.9 dB at 30 Hz)
Tonal Tilt	-0.86 (negative is warmer, positive brighter)

EQ Presets

Target sound

Harman 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 89 out of 100, up from 66.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-2.6 dB	0.70
High shelf	10,000 Hz	-1.2 dB	0.70
Peak	189 Hz	-3.8 dB	0.81
Peak	786 Hz	+0.9 dB	2.86
Peak	5,345 Hz	+4.0 dB	1.63
Peak	8,000 Hz	-1.9 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 91 out of 100, up from 27.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-11.1 dB	0.70
High shelf	10,000 Hz	-1.2 dB	0.70
Peak	186 Hz	-3.6 dB	0.67
Peak	758 Hz	+0.9 dB	2.18
Peak	5,345 Hz	+4.0 dB	1.63
Peak	8,000 Hz	-1.9 dB	6.00

Studio flat target

Set a preamp of -3.1 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 89 out of 100, up from 9.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-12.0 dB	0.70
High shelf	10,000 Hz	+1.9 dB	0.70
Peak	169 Hz	-5.8 dB	0.68
Peak	1,506 Hz	-1.3 dB	2.94
Peak	2,773 Hz	+3.1 dB	0.89
Peak	5,886 Hz	+2.0 dB	4.16

Warm target

Set a preamp of -2.2 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 89 out of 100, up from 75.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-2.4 dB	0.70
High shelf	10,000 Hz	-4.8 dB	0.70
Peak	186 Hz	-3.6 dB	0.86
Peak	786 Hz	+1.1 dB	2.90
Peak	5,605 Hz	+2.5 dB	3.60
Peak	8,000 Hz	-2.9 dB	6.00

Bass 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 91 out of 100, up from 76.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+1.2 dB	0.70
High shelf	10,000 Hz	-1.2 dB	0.70
Peak	41 Hz	+0.7 dB	1.90
Peak	193 Hz	-3.8 dB	0.84
Peak	789 Hz	+0.9 dB	2.96
Peak	5,345 Hz	+4.0 dB	1.63
Peak	8,000 Hz	-1.9 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 89 out of 100, up from 17.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-11.2 dB	0.70
High shelf	10,000 Hz	+1.8 dB	0.70
Peak	186 Hz	-3.6 dB	0.67
Peak	4,900 Hz	+6.0 dB	1.49

V-shaped target

Set a preamp of -6.1 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 4 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 88 out of 100, up from 68.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+1.8 dB	0.70
High shelf	10,000 Hz	+2.0 dB	0.70
Peak	189 Hz	-2.4 dB	0.90
Peak	4,728 Hz	+6.0 dB	1.30

Check current price at KZ Audio (2.00) →Search eBay for KZ Libra →

Reviews, Comparisons and Sound Samples
- Frequency response measurements of the KZ Libra by 4 squig.link measurers

Frequency Response

How the KZ Libra 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 6 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.

KZ LibraHarman target

Measurement data: median of 6 measurements from the squig.link databases of boizoff, eplv, obodio, soundcheck39, theaudiostore and treblewellxtended. Thanks to each of them for publishing their work.

More KZ headphones →

KZ Libra Review: Ranked #901 of 1369