Short answer: the KZ ZSN Pro X. It ranks #19 of 68 in-ear headphones by sound quality, rated 4.0/5, at $23.99; the KZ ZSN Pro ranks #23, rated 3.9/5, and costs $24.99, which makes this an easy call rather than a real tradeoff.
Why pick the KZ ZSN Pro X: The hybrid design with a 10mm dynamic driver and a balanced armature gives bass about 3.6 dB above target at 60 to 200 Hz, which adds punch and warmth for pop and hip hop. Watch for: A 7.2 dB peak near 8.1 kHz and an air band about 5.8 dB above target can make cymbals and s sounds sharp or hissy at higher volume.
Why pick the KZ ZSN Pro: A preference score of 73 in HypetheSonics’ measurement is solid for a wired set this cheap, with a response that stays within about 2.2 dB of the Harman target. The catch: Treble above 10 kHz runs about 6 dB hot, with a sharp 9.4 dB peak near 11 kHz that can make cymbals and hi-hats sound glassy or hissy.
Buy the KZ ZSN Pro X. It is rated higher for sound quality than the KZ ZSN Pro and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| KZ ZSN Pro X | KZ ZSN Pro | |
|---|---|---|
| Price | $23.99 | $24.99 |
| Ranked | #19 of 68 in In-Ear Headphones | #23 of 68 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 74 (measured by oratory1990, via AutoEQ) | 73 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 2.09 dB standard deviation | 2.23 dB standard deviation |
| Tonal Tilt | -0.17 (negative is warmer, positive brighter) | -0.11 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature | 1 x 10mm dynamic + 1 x balanced armature |
| Impedance | 25 ohms | 25 ohms |
| Sensitivity | 112 dB/mW | 104 dB/mW |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) | 20Hz - 40kHz (Manufacturer specified) |
| Back | Closed | Closed |
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Prices on this page were last checked October 10, 2026 at 5:37 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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The Two Headphones In Full
KZ ZSN Pro X: $23.99 Amazon eBay
Pros: The hybrid design with a 10mm dynamic driver and a balanced armature gives bass about 3.6 dB above target at 60 to 200 Hz, which adds punch and warmth for pop and hip hop. A preference score of 74 at an inexpensive price is strong, and the 25 ohm impedance with 112 dB/mW sensitivity makes it easy to drive from a phone. It also suits a warm or v-shaped taste.
Cons: A 7.2 dB peak near 8.1 kHz and an air band about 5.8 dB above target can make cymbals and s sounds sharp or hissy at higher volume. The 3 to 4 kHz region dips about 2.9 dB, so vocals can sound a little distant. It has no wireless features or noise cancelling.
Full KZ ZSN Pro X review and specifications →
| Released | Jul 2020 (6 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.09 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 74 (measured by oratory1990, via AutoEQ) |
| Impedance | 25 ohms |
| Sensitivity | 112 dB/mW |
| Tonal Tilt | -0.17 (negative is warmer, positive brighter) |
EQ preset to match the Harman 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.8 dB | 0.70 |
| Peak | 928 Hz | +5.3 dB | 0.66 |
| Peak | 166 Hz | -3.4 dB | 0.67 |
| Peak | 2,193 Hz | -4.4 dB | 0.61 |
| Peak | 3,392 Hz | +6.1 dB | 2.82 |
| High shelf | 10,000 Hz | -4.4 dB | 0.70 |
| Peak | 6,459 Hz | +3.5 dB | 5.25 |
| Peak | 4,968 Hz | -3.5 dB | 5.59 |
| Peak | 4,039 Hz | +1.3 dB | 6.00 |
| Peak | 5,964 Hz | +0.9 dB | 5.91 |
- Reviews, Comparisons and Sound Samples
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KZ ZSN Pro: $24.99 Amazon eBay
Pros: A preference score of 73 in HypetheSonics’ measurement is solid for a wired set this cheap, with a response that stays within about 2.2 dB of the Harman target. Bass sits roughly 3 dB above target from 60 to 200 Hz, adding punch to kick drums and bass guitar without muddying the lower midrange, which stays within 1 dB. At 25 ohms and 104 dB/mW it runs loudly from a phone, and the hybrid dynamic plus balanced armature design suits v-shaped and warm tastes. It also rates higher than the MEE Audio M6 Pro.
Cons: Treble above 10 kHz runs about 6 dB hot, with a sharp 9.4 dB peak near 11 kHz that can make cymbals and hi-hats sound glassy or hissy. A 3.7 dB dip near 3.4 kHz pulls vocals and snare snap slightly back. Listeners who want a flat, neutral tuning will find the bass and treble both exaggerated.
Full KZ ZSN Pro review and specifications →
| Released | 2019 (7 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.23 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 73 (measured by HypetheSonics, via AutoEQ) |
| Impedance | 25 ohms |
| Sensitivity | 104 dB/mW |
| Tonal Tilt | -0.11 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.2 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.5 dB | 0.70 |
| Peak | 750 Hz | +3.7 dB | 0.88 |
| Peak | 160 Hz | -3.1 dB | 0.79 |
| Peak | 3,264 Hz | +4.4 dB | 3.80 |
| Peak | 2,073 Hz | -3.5 dB | 2.04 |
| High shelf | 10,000 Hz | -5.0 dB | 0.70 |
| Peak | 4,840 Hz | -4.2 dB | 6.00 |
| Peak | 6,161 Hz | +3.4 dB | 4.50 |
| Peak | 3,841 Hz | +1.8 dB | 5.81 |
| Peak | 4,626 Hz | -1.0 dB | 5.62 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons