The LZ A4 Pro ranks #1002 out of 1369 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.

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LZ A4 Pro - ranked #1002 of 1369 In-Ear Headphones · Editor's rating 3.2/5

Check price at HiFiGo ($246.05) →

#1002 LZ A4 Pro: $246.05 HiFiGo $246.05 eBay

Pros: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.

Cons: Treble about 5 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones. An uneven response, 3.0 dB standard deviation from target.

Is the LZ A4 Pro right for you?

Buy it if

you are sensitive to bright or sharp treble (treble sits 5.1 dB below target).

Skip it if

you want the best value: the higher-rated EPZ G10 costs about $222 less.

Back	Closed
Connection	Wired
Deviation From Target	2.97 dB standard deviation
Driver Type	Hybrid (1 dynamic + 3 balanced armature)
Drivers	1 x CNT dynamic driver + 3 x Knowles balanced armature drivers
Form Factor	In-ear
Frequency Response	20Hz - 20kHz
Harman Preference Score	64 (median of 3 squig.link measurements, calibrated to AutoEQ)
Impedance	26 ohms
Sensitivity	112 dB/mW
Sub-bass Extension	Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz)
Tonal Tilt	-0.47 (negative is warmer, positive brighter)

EQ Presets

Target sound

Harman 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 75 out of 100, up from 64.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+1.6 dB	0.70
High shelf	10,000 Hz	+0.9 dB	0.70
Peak	1,771 Hz	-3.7 dB	4.28
Peak	2,715 Hz	+1.9 dB	5.09
Peak	5,045 Hz	+6.0 dB	1.75

Neutral 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 75 out of 100, up from 34.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-7.0 dB	0.70
High shelf	10,000 Hz	+0.9 dB	0.70
Peak	1,771 Hz	-3.7 dB	4.28
Peak	2,715 Hz	+1.9 dB	5.09
Peak	5,044 Hz	+6.0 dB	1.75

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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 81 out of 100, up from 19.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-9.5 dB	0.70
High shelf	10,000 Hz	+2.0 dB	0.70
Peak	167 Hz	-3.3 dB	0.93
Peak	1,752 Hz	-3.4 dB	3.98
Peak	2,669 Hz	+3.3 dB	6.00
Peak	3,716 Hz	-1.8 dB	6.00
Peak	4,753 Hz	+5.3 dB	1.11

Warm 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 the median of 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 82 out of 100, up from 71.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+1.8 dB	0.70
High shelf	10,000 Hz	-2.5 dB	0.70
Peak	692 Hz	+2.1 dB	1.93
Peak	1,798 Hz	-4.2 dB	3.84
Peak	5,432 Hz	+6.0 dB	2.38

Bass 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 77 out of 100, up from 62.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+5.3 dB	0.70
High shelf	10,000 Hz	+0.9 dB	0.70
Peak	1,771 Hz	-3.7 dB	4.27
Peak	2,715 Hz	+1.9 dB	5.09
Peak	5,046 Hz	+6.0 dB	1.75

Bright 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 67 out of 100, up from 22.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-7.0 dB	0.70
High shelf	10,000 Hz	+2.0 dB	0.70
Peak	1,768 Hz	-3.8 dB	4.12
Peak	2,714 Hz	+1.9 dB	5.58
Peak	4,604 Hz	+6.0 dB	1.46
Peak	5,752 Hz	+1.9 dB	6.00

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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 66 out of 100, up from 55.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+5.7 dB	0.70
High shelf	10,000 Hz	+2.0 dB	0.70
Peak	1,737 Hz	-3.6 dB	4.12
Peak	4,604 Hz	+6.0 dB	1.31

Check current price at HiFiGo ($246.05) →Search eBay for LZ A4 Pro →

Reviews, Comparisons and Sound Samples
- Frequency response measurements of the LZ A4 Pro by 3 squig.link measurers

Frequency Response

How the LZ A4 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 the median of 3 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.

LZ A4 ProHarman target

Measurement data: median of 3 measurements from the squig.link databases of achoreviews, ankramutt and rg. Thanks to each of them for publishing their work.

LZ A4 Pro Review: Ranked #1002 of 1369