Short answer: a tie on sound quality. Both are rated 3.9/5 (#22 and #25 of 68 in-ear headphones) at nearly the same price ($24.99 vs $20.99), so choose on features and fit.
What the 7Hz x Crinacle Zero 2 does well: Crinacle’s measurement gives a preference score of 73 with a response that stays fairly even, a standard deviation of 1.99 dB around target. The catch: The tilt of negative 0.71 is the warmest in this group, so treble detail and air can sound subdued.
What the CCA CRA does well: A preference score of 72 in crinacle’s measurement is strong for one of the least expensive wired sets in its class, and the 1.98 dB deviation from target is among the smoothest in this group. Watch for: The tuning is a notch below the best sets in the class, and the slightly warm lean can soften treble detail for those who prefer a brighter sound.
Buy the 7Hz x Crinacle Zero 2 or the CCA CRA on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| 7Hz x Crinacle Zero 2 | CCA CRA | |
|---|---|---|
| Price | $24.99 | $20.99 |
| Ranked | #22 of 68 in In-Ear Headphones | #25 of 68 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 73 (measured by crinacle, via AutoEQ) | 72 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 1.99 dB standard deviation | 1.98 dB standard deviation |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) | -0.71 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Impedance | 32 ohms | 23.5 ohms |
| Sensitivity | 108 dB SPL/V | 111 dB |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | - |
| Back | Closed | Closed |
Related Headphone Comparisons
How 7Hz x Crinacle Zero 2 compares with other leading options:
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro
- CCA CRA vs KZ ZSN Pro
- KZ ZSN Pro X vs KZ ZSN Pro
- CCA C12 vs MEE Audio M6 Pro
- Truthear x Crinacle Zero RED vs Tin HiFi T4
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
7Hz x Crinacle Zero 2: $24.99 Amazon eBay
Older model: the 7Hz Salnotes Zero (ranked higher, rated 4.8/5). See every 7Hz Zero generation.
Pros: Crinacle’s measurement gives a preference score of 73 with a response that stays fairly even, a standard deviation of 1.99 dB around target. A 10mm dynamic driver at 32 ohms and 108 dB SPL/V sensitivity runs from a phone with no amp. The low cost makes it an easy entry into wired in-ears.
Cons: The tilt of negative 0.71 is the warmest in this group, so treble detail and air can sound subdued. It has no wireless features, noise cancelling or listed microphone. The KZ ZSN Pro X has a higher rating at a similar price.
Full 7Hz x Crinacle Zero 2 review and specifications →
| Released | Nov 2023 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.99 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 73 (measured by crinacle, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 108 dB SPL/V |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.4 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 | -1.1 dB | 0.70 |
| Peak | 6,290 Hz | +4.3 dB | 0.72 |
| Peak | 182 Hz | -2.3 dB | 1.03 |
| Peak | 1,916 Hz | -1.7 dB | 0.50 |
| Peak | 855 Hz | +1.8 dB | 1.59 |
| High shelf | 10,000 Hz | +0.9 dB | 0.70 |
| Peak | 67 Hz | +0.4 dB | 2.53 |
| Peak | 7,224 Hz | -1.2 dB | 5.84 |
| Peak | 5,811 Hz | +0.8 dB | 5.07 |
| Peak | 3,871 Hz | -0.3 dB | 2.41 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
CCA CRA: $20.99 Amazon eBay
Pros: A preference score of 72 in crinacle’s measurement is strong for one of the least expensive wired sets in its class, and the 1.98 dB deviation from target is among the smoothest in this group. The 111 dB sensitivity and 23.5 ohm impedance mean a phone drives it to high volume with ease. The slightly warm tilt suits listeners who like a touch of extra bass.
Cons: The tuning is a notch below the best sets in the class, and the slightly warm lean can soften treble detail for those who prefer a brighter sound. It has no listed frequency range or other extras, so the case for it rests on the tuning and low cost.
Full CCA CRA review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.98 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 72 (measured by crinacle, via AutoEQ) |
| Impedance | 23.5 ohms |
| Sensitivity | 111 dB |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -2.7 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 | -2.5 dB | 0.70 |
| Peak | 183 Hz | -2.3 dB | 1.19 |
| Peak | 818 Hz | +2.3 dB | 1.03 |
| Peak | 3,058 Hz | +2.5 dB | 2.13 |
| Peak | 1,484 Hz | -1.5 dB | 1.88 |
| High shelf | 10,000 Hz | -5.7 dB | 0.70 |
| Peak | 9,654 Hz | +2.4 dB | 2.57 |
| Peak | 6,044 Hz | +3.0 dB | 5.11 |
| Peak | 66 Hz | +0.7 dB | 2.30 |
| Peak | 4,821 Hz | -2.0 dB | 5.10 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons