Short answer: the Moondrop Ultrasonic. It ranks #76 of 450 in-ear headphones by sound quality, rated 4.5/5, at $89.99; the 7Hz Salnotes Dioko ranks #94, rated 4.4/5, and costs $99, so there is not much of a tradeoff to weigh.
What the Moondrop Ultrasonic does well: It is a true wireless earbud with active noise cancelling, LDAC and LC3 support over Bluetooth 5.3, and 6 hours of playback with 24 in total from the case. The catch: Sub-bass falls about 2.9 dB below target and 3.4 dB down at 30 Hz, so deep bass lacks the slam many wireless buyers expect.
Why pick the 7Hz Salnotes Dioko: A preference score of 79 in oratory1990’s measurement, with bass and mids from 20 Hz to 3 kHz held within about 1.4 dB of target, so the low end is full and extends deep. The tradeoff: Air above 10 kHz rises 7.1 dB over target with a 5.6 dB peak near 11.9 kHz, which can make cymbals and hi-hats sound splashy.
Buy the Moondrop Ultrasonic. It is rated higher for sound quality than the 7Hz Salnotes Dioko and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Moondrop Ultrasonic | 7Hz Salnotes Dioko | |
|---|---|---|
| Price | $89.99 | $99.00 |
| Ranked | #76 of 450 in In-Ear Headphones | #94 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 80 (median of 9 squig.link measurements, calibrated to AutoEQ) | 79 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 1.51 dB standard deviation | 1.85 dB standard deviation |
| Tonal Tilt | -0.00 (negative is warmer, positive brighter) | -0.01 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Connection | True wireless | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Planar magnetic |
| Drivers | 1 x 13mm dynamic + 1 x balanced armature | 1 x 14.6mm planar magnetic |
| Active Noise Cancelling | Yes | - |
| Battery Life | 6 hours (24 with case, Manufacturer specified) | - |
| Bluetooth Version | 5.3 | - |
| Bluetooth Codecs | SBC, AAC, LDAC, LC3 | - |
| Built-in Microphone | Yes | No |
| Impedance | - | 16 ohms |
| Sensitivity | - | 106 dB SPL/V |
| Frequency Response | - | 5Hz - 40kHz (Manufacturer specified) |
Related Headphone Comparisons
More top alternatives to Moondrop Ultrasonic:
- Moondrop Golden Ages 2 vs Moondrop Ultrasonic
- Moondrop Ultrasonic vs Tanchjim Mino
- 7Hz Salnotes Dioko vs Tanchjim Mino
- 7Hz Salnotes Dioko vs Oriveti Bleqk Dynabird
- 7Hz Salnotes Dioko vs Moondrop Kato
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
Moondrop Ultrasonic: $89.99 TWS Amazon eBay
Pros: It is a true wireless earbud with active noise cancelling, LDAC and LC3 support over Bluetooth 5.3, and 6 hours of playback with 24 in total from the case. In eight hobbyist measurements on squig.link it earns a preference score of 79.6, with low mids within about half a decibel of target. A built-in microphone handles calls.
Cons: Sub-bass falls about 2.9 dB below target and 3.4 dB down at 30 Hz, so deep bass lacks the slam many wireless buyers expect. A 7.1 dB dip near 10.6 kHz and an air band about 1.9 dB short dull the treble’s sparkle.
Full Moondrop Ultrasonic review and specifications →
| Released | Aug 2024 (2 years ago) |
|---|---|
| Active Noise Cancelling | Yes |
| Back | Closed |
| Battery Life | 6 hours (24 with case, Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC, LC3 |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Connection | True wireless |
| Deviation From Target | 1.51 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 13mm dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 80 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.3 dB at 30 Hz) |
| Tonal Tilt | -0.00 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
7Hz Salnotes Dioko: $99.00 Linsoul eBay
Pros: A preference score of 79 in oratory1990’s measurement, with bass and mids from 20 Hz to 3 kHz held within about 1.4 dB of target, so the low end is full and extends deep. The 14.6 mm planar magnetic driver and 16 ohm impedance give an unusual driver type at a modest price. It rates on par with the Sennheiser IE 200.
Cons: Air above 10 kHz rises 7.1 dB over target with a 5.6 dB peak near 11.9 kHz, which can make cymbals and hi-hats sound splashy. A 6.6 dB dip near 3.8 kHz pulls vocals back. The Truthear x Crinacle Zero RED costs less and earns a much higher rating.
Full 7Hz Salnotes Dioko review and specifications →
| Released | Jun 2022 (4 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.85 dB standard deviation |
| Driver Type | Planar magnetic |
| Drivers | 1 x 14.6mm planar magnetic |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 79 (measured by oratory1990, via AutoEQ) |
| Impedance | 16 ohms |
| Sensitivity | 106 dB SPL/V |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Tonal Tilt | -0.01 (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 | -2.4 dB | 0.70 |
| Peak | 4,080 Hz | +4.4 dB | 2.65 |
| Peak | 62 Hz | +3.8 dB | 0.75 |
| Peak | 1,486 Hz | -1.9 dB | 2.24 |
| Peak | 189 Hz | -1.1 dB | 1.50 |
| High shelf | 10,000 Hz | -7.4 dB | 0.70 |
| Peak | 10,000 Hz | -2.0 dB | 2.03 |
| Peak | 5,928 Hz | +2.7 dB | 5.58 |
| Peak | 2,772 Hz | +1.0 dB | 4.20 |
| Peak | 655 Hz | +0.4 dB | 1.91 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons