Short answer: the KZ ZSN Pro. It ranks #276 of 450 in-ear headphones by sound quality, rated 3.9/5, at $24.99; the CCA CSN ranks #356, rated 3.5/5, and costs $25.99, so there is little reason to consider the other one.
The KZ ZSN Pro is the better-sounding pick. 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.
Why pick the CCA CSN: Across six hobbyist measurements on squig.link, bass runs about 2 dB above target with sub-bass only 1.4 dB short at 30 Hz, giving a warm, full low end that suits pop and electronic music. The catch: A 6.9 dB dip near 3.4 kHz sets voices back, while a 5.5 dB peak at 8.1 kHz can make cymbals and sibilants splashy, a V-shaped balance that will not suit neutral tastes.
Buy the KZ ZSN Pro. It is rated higher for sound quality than the CCA CSN and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| KZ ZSN Pro | CCA CSN | |
|---|---|---|
| Price | $24.99 | $25.99 |
| Ranked | #276 of 450 in In-Ear Headphones | #356 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 73 (measured by HypetheSonics, via AutoEQ) | 67 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.23 dB standard deviation | 2.64 dB standard deviation |
| Tonal Tilt | -0.11 (negative is warmer, positive brighter) | -0.46 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| 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 | 22.5 ohms |
| Sensitivity | 104 dB/mW | 112 dB/mW |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 20Hz - 40kHz |
| Back | Closed | Closed |
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More worthwhile head-to-heads for KZ ZSN Pro:
- KZ ZSN Pro vs KZ ZSN Pro 2
- KZ ZSN Pro X vs KZ ZSN Pro
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro
- DUNU Titan S vs KZ ZSN Pro
- CCA CRA vs KZ ZSN Pro
Prices on this page were last checked October 11, 2026 at 4:59 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: $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 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.1 dB at 30 Hz) |
| 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
CCA CSN: $25.99 Amazon eBay
Pros: Across six hobbyist measurements on squig.link, bass runs about 2 dB above target with sub-bass only 1.4 dB short at 30 Hz, giving a warm, full low end that suits pop and electronic music. Crinacle’s measurement returns a preference score of 67, respectable for an inexpensive hybrid of a 10 mm dynamic driver and a balanced armature. At 22.5 ohms and 112 dB/mW it gets loud from any phone.
Cons: A 6.9 dB dip near 3.4 kHz sets voices back, while a 5.5 dB peak at 8.1 kHz can make cymbals and sibilants splashy, a V-shaped balance that will not suit neutral tastes. The KZ ZST costs a little less and is rated higher, as are the CCA C10 and MEE Audio M6 Pro for a modest step up.
Full CCA CSN review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.64 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 |
| Harman Preference Score | 67 (measured by crinacle, via AutoEQ) |
| Impedance | 22.5 ohms |
| Sensitivity | 112 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Tonal Tilt | -0.46 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -5.7 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 | 164 Hz | -3.5 dB | 0.59 |
| Peak | 3,200 Hz | +7.0 dB | 1.48 |
| Peak | 1,878 Hz | -6.0 dB | 1.38 |
| Peak | 809 Hz | +2.8 dB | 0.77 |
| High shelf | 10,000 Hz | +3.1 dB | 0.70 |
| Peak | 5,170 Hz | -4.2 dB | 5.86 |
| Peak | 6,353 Hz | +2.7 dB | 6.00 |
| Peak | 4,393 Hz | +1.6 dB | 6.00 |
| Peak | 37 Hz | -0.2 dB | 2.04 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons