Short answer: a tie on sound quality. Both are rated 3.5/5 (#818 and #808 of 1291 in-ear headphones) at nearly the same price ($25.99 vs $29.99), so choose on features and fit.
The case for 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. Watch for: 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.
Why pick the HZSOUND Luna: A broadly balanced tuning with a preference score of 68 against the Harman target. The catch: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the CCA CSN or the HZSOUND Luna on features: they are rated the same for sound quality at close to the same price.
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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.
Amazon $25.99 eBay
A broadly balanced tuning with a preference score of 68 against the Harman target.
Amazon $29.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| CCA CSN | HZSOUND Luna | |
|---|---|---|
| Price | $25.99 | $29.99 |
| Ranked | #818 of 1291 in In-Ear Headphones | #808 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 67 (measured by crinacle, via AutoEQ) | 68 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.64 dB standard deviation | 2.31 dB standard deviation |
| Tonal Tilt | -0.46 (negative is warmer, positive brighter) | -0.69 (negative is warmer, positive brighter) |
| Connection | Wired | Wired (3.5mm) |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Dynamic |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature | 1 Dynamic (10mm flat diaphragm) |
| Impedance | 22.5 ohms | - |
| Sensitivity | 112 dB/mW | - |
| Frequency Response | 20Hz - 40kHz | - |
| Back | Closed | Closed |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the CCA CSN from aftersound, bedrock, melatonin, precog, pw and vortexreviews; the HZSOUND Luna from audioamigo, eplv, pw, soundcheck39, theaudiostore, tonedeafmonk and treblewellxtended, all via squig.link.
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