Short answer: the 7Hz x Crinacle Diablo, though neither ranks well in its class. It ranks #1092 of 1291 in-ear headphones by sound quality, rated 2.6/5, at $159; the Master & Dynamic MW07 ranks #1119, rated 2.3/5, at $156.75. Close enough in price that the sound-quality gap is the deciding factor. Both are rated below 3.0/5 among the 1291 in-ear headphones; for better sound, the Truthear Nova ranks #2 at $169.99.
The 7Hz x Crinacle Diablo is the better-sounding choice. The single 14.5mm planar driver holds its output down to 20 Hz, sitting about 1 dB above target at 30 Hz, so deep synth lines and kick drums keep their weight. The catch: Across 16 hobbyist measurements it earns a preference score of only 56, with a 7 dB dip near 6.3 kHz and presence about 3 dB shy of target that dull vocals, guitars and cymbal attack.
The case for the Master & Dynamic MW07: These true wireless earbuds support aptX alongside SBC for better quality from compatible Android phones, and an IPX4 rating protects them against sweat and splashes. The catch: Crinacle’s measurement gives it a preference score of 53, far from the balance most listeners prefer.
Buy the 7Hz x Crinacle Diablo. It is rated higher for sound quality, and the $2.25 you would save on the Master & Dynamic MW07 does not close the gap.
Looking for alternatives? See the complete Headphones rankings.
The single 14.5mm planar driver holds its output down to 20 Hz, sitting about 1 dB above target at 30 Hz, so deep synth lines and kick drums keep their weight.
Amazon $159.00 eBay
These true wireless earbuds support aptX alongside SBC for better quality from compatible Android phones, and an IPX4 rating protects them against sweat and splashes.
Amazon $156.75 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| 7Hz x Crinacle Diablo | Master & Dynamic MW07 | |
|---|---|---|
| Price | $159.00 | $156.75 |
| Ranked | #1092 of 1291 in In-Ear Headphones | #1119 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 56 (median of 16 squig.link measurements, calibrated to AutoEQ) | 53 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.98 dB standard deviation | 3.61 dB standard deviation |
| Tonal Tilt | -1.26 (negative is warmer, positive brighter) | -0.75 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) | - |
| Connection | Wired | True wireless |
| Driver Type | Planar magnetic | Dynamic |
| Drivers | 1 x 14.5mm planar magnetic | 1 x 10mm dynamic |
| Impedance | 18 ohms | - |
| Sensitivity | 107 dB/V @ 1kHz | - |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | - |
| Built-in Microphone | No | Yes |
| Active Noise Cancelling | - | No |
| Battery Life | - | 3.5 hours (14 with case, Manufacturer specified) |
| Bluetooth Version | - | 4.2 |
| Bluetooth Codecs | - | SBC, aptX |
| IP Rating | - | IPX4 |
| Weight | - | 0 lbs (9 g) per earbud |
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