Short answer: the Moondrop Aria 2 if sound quality matters most, the 7Hz x Crinacle Zero 2 if price matters most. The Moondrop Aria 2 ranks #235 of 466 in-ear headphones, rated 4.1/5, at $99.99. The 7Hz x Crinacle Zero 2 ranks #281, rated 3.9/5, at $24.99, $75 cheaper.
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. Watch for: 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.
Why pick the Moondrop Aria 2: In squig.link measurements it reaches a preference score of 75 with a smooth response, deviating only about 2 dB on average from the Harman target. The catch: A 4.8 dB dip near 6 kHz and presence about 2.8 dB below target take some bite and detail off snares and consonants.
Buy the 7Hz x Crinacle Zero 2 if the price is the priority over sound quality, or the Moondrop Aria 2 if sound quality is the priority over the price.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| 7Hz x Crinacle Zero 2 | Moondrop Aria 2 | |
|---|---|---|
| Price | $24.99 | $99.99 |
| Ranked | #281 of 466 in In-Ear Headphones | #235 of 466 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 73 (measured by crinacle, via AutoEQ) | 75 (median of 22 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.99 dB standard deviation | 1.97 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 | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Impedance | 32 ohms | 33 ohms |
| Sensitivity | 108 dB SPL/V | 122 dB/Vrms |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | 16Hz - 22kHz (Manufacturer specified) |
| Back | Closed | Closed |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.7 dB at 30 Hz) |
| Built-in Microphone | - | No |
Related Headphone Comparisons
More worthwhile head-to-heads for Moondrop Aria 2:
- 7Hz x Crinacle Zero 2 vs Sony WI-C100
- Letshuoer D02 vs 7Hz x Crinacle Zero 2
- 7Hz x Crinacle Zero 2 vs CCA CSN
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro
- 7Hz x Crinacle Zero 2 vs DUNU Titan S
Prices on this page were last checked October 12, 2026 at 4:13 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 $24.99 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 (+1.3 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
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro
- 7Hz x Crinacle Zero 2 vs DUNU Titan S
- 7Hz x Crinacle Zero 2 vs Letshuoer D02
- 7Hz x Crinacle Zero 2 vs CCA CRA
- 7Hz x Crinacle Zero 2 vs Kiwi Ears Orchestra
- 7Hz x Crinacle Zero 2 vs Sony WI-C100
- 7Hz x Crinacle Zero 2 vs KZ ZSN Pro X
- 7Hz x Crinacle Zero 2 vs CCA CSN
- See all 9 comparisons
Moondrop Aria 2: $99.99 Amazon $99.99 eBay
Pros: In squig.link measurements it reaches a preference score of 75 with a smooth response, deviating only about 2 dB on average from the Harman target. Bass sits about 1.4 dB above target and the upper mids land almost exactly on it, so vocals and guitars sound natural with a slightly full low end. Sensitivity of 122 dB/V and a 33 ohm load mean any phone or dongle drives it to loud levels.
Cons: A 4.8 dB dip near 6 kHz and presence about 2.8 dB below target take some bite and detail off snares and consonants. Sub-bass sits about 2.2 dB under target, so deep synth rumble is a little lighter than on a bass-focused set. There is no inline microphone for calls.
Full Moondrop Aria 2 review and specifications →
| Released | 2023 (3 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.97 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 16Hz - 22kHz (Manufacturer specified) |
| Harman Preference Score | 75 (median of 22 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 33 ohms |
| Sensitivity | 122 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.7 dB at 30 Hz) |
| Tonal Tilt | -0.13 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples