Short answer: a tie on sound quality. Both are rated 3.9/5 (#275 and #299 of 450 in-ear headphones), 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 catch: 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.
What the Kiwi Ears Orchestra does well: Eight balanced armatures per side earn a preference score of 72 in crinacle’s measurement. Watch for: Presence sits 5.5 dB below target with a 6.7 dB dip near 5.3 kHz, which pushes vocals and guitar bite back and makes some recordings sound distant.
Buy the 7Hz x Crinacle Zero 2 or the Kiwi Ears Orchestra on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| 7Hz x Crinacle Zero 2 | Kiwi Ears Orchestra | |
|---|---|---|
| Price | $24.99 | - |
| Ranked | #275 of 450 in In-Ear Headphones | #299 of 450 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 | 2.33 dB standard deviation |
| Tonal Tilt | -0.71 (negative is warmer, positive brighter) | +0.13 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Balanced armature |
| Drivers | 1 x 10mm dynamic | 8 x balanced armature |
| Impedance | 32 ohms | 17 ohms |
| Sensitivity | 108 dB SPL/V | 111 dB |
| 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 (-5.3 dB at 30 Hz) |
Related Headphone Comparisons
More top alternatives to 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.
As an eBay Partner, we may be compensated if you make a purchase.
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
Kiwi Ears Orchestra AliExpress eBay
Pros: Eight balanced armatures per side earn a preference score of 72 in crinacle’s measurement. Across hobbyist measurements on squig.link the bass and lower midrange sit within 1 dB of target and the largest treble peak is only 2.4 dB, so the sound stays clean and free of harshness. At 17 ohms and 111 dB it plays loud from a phone or small dongle.
Cons: Presence sits 5.5 dB below target with a 6.7 dB dip near 5.3 kHz, which pushes vocals and guitar bite back and makes some recordings sound distant. Sub-bass runs 4.4 dB under target and is 5.3 dB down at 30 Hz, so the all armature design gives less deep rumble than a dynamic driver set. It is wired only.
Full Kiwi Ears Orchestra review and specifications →
| Released | May 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.33 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 8 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 72 (measured by crinacle, via AutoEQ) |
| Impedance | 17 ohms |
| Sensitivity | 111 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.3 dB at 30 Hz) |
| Tonal Tilt | +0.13 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.3 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 | +2.8 dB | 0.70 |
| Peak | 4,518 Hz | +4.3 dB | 1.08 |
| Peak | 203 Hz | -2.0 dB | 0.70 |
| Peak | 6,642 Hz | -3.1 dB | 4.68 |
| Peak | 1,670 Hz | -1.6 dB | 2.02 |
| High shelf | 10,000 Hz | -2.3 dB | 0.70 |
| Peak | 879 Hz | +1.0 dB | 2.21 |
| Peak | 443 Hz | -0.3 dB | 1.47 |
| Peak | 1,294 Hz | -0.6 dB | 3.70 |
| Peak | 5,298 Hz | +1.0 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons