Short answer: a tie on sound quality. Both are rated 3.9/5 (#275 and #312 of 450 in-ear headphones) at nearly the same price ($24.99 vs $23), so choose on features and fit.
What the 7Hz x Crinacle Zero 2 does well: Crinacle’s measurement gives it a preference score of 73, and an average deviation of just 2 dB from the Harman target is unusually even for a budget single dynamic driver. The tradeoff: Hobbyist measurements show the presence region about 3 dB shy of target with a 4.7 dB dip near 5.9 kHz, which can make guitars and vocal consonants sound a little veiled.
Buy the 7Hz x Crinacle Zero 2 or the Sony WI-C100 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 | Sony WI-C100 | |
|---|---|---|
| Price | $24.99 | $23.00 |
| Ranked | #275 of 450 in In-Ear Headphones | #312 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 73 (measured by crinacle, via AutoEQ) | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.99 dB standard deviation | 1.94 dB standard deviation |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) | -0.49 (negative is warmer, positive brighter) |
| Connection | Wired | Wireless |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 9mm dynamic |
| Impedance | 32 ohms | - |
| Sensitivity | 108 dB SPL/V | - |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Back | Closed | Closed |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) |
| Weight | - | 0 lbs (20 g) |
| Active Noise Cancelling | - | No |
| Battery Life | - | 25 hours (Manufacturer specified) |
| Bluetooth Version | - | 5.0 |
| Bluetooth Codecs | - | SBC, AAC |
| Built-in Microphone | - | Yes |
| IP Rating | - | IPX4 |
Related Headphone Comparisons
More worthwhile head-to-heads for 7Hz x Crinacle Zero 2:
- KZ ZSN Pro X vs 7Hz x Crinacle Zero 2
- Letshuoer D02 vs 7Hz x Crinacle Zero 2
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro
- 7Hz x Crinacle Zero 2 vs DUNU Titan S
- 7Hz x Crinacle Zero 2 vs CCA CRA
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
7Hz x Crinacle Zero 2: $24.99 Amazon AliExpress eBay
Older model: the 7Hz Salnotes Zero (ranked higher, rated 4.8/5). See every 7Hz Zero generation.
Pros: Crinacle’s measurement gives it a preference score of 73, and an average deviation of just 2 dB from the Harman target is unusually even for a budget single dynamic driver. Across four hobbyist measurements on squig.link, bass sits about 1.8 dB above target and sub-bass reaches flat to 20 Hz, so kick drums and synth lines have a gentle, full weight without swamping vocals. The mildly warm balance suits listeners who like a relaxed, bassy tilt over a bright one.
Cons: Hobbyist measurements show the presence region about 3 dB shy of target with a 4.7 dB dip near 5.9 kHz, which can make guitars and vocal consonants sound a little veiled. A 4.2 dB lift near 11.9 kHz adds some sparkle on top that can draw attention to cymbals. The KZ ZSN Pro X rates slightly higher 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 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.1 dB at 30 Hz) |
| 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
Sony WI-C100: $23.00 Wireless Amazon eBay
Full Sony WI-C100 review and specifications →
| Active Noise Cancelling | No |
|---|---|
| Back | Closed |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Connection | Wireless |
| Deviation From Target | 1.94 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 9mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| IP Rating | IPX4 |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) |
| Tonal Tilt | -0.49 (negative is warmer, positive brighter) |
| Weight | 0 lbs (20 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons