Short answer: the Hidizs MK10. It ranks #191 of 1291 in-ear headphones by sound quality, rated 4.3/5, at $73.99; the 7Hz Sonus II ranks #258, rated 4.2/5, and costs $75.99, so there is little reason to consider the other one.
What the Hidizs MK10 does well: The median of 4 hobbyist measurements gives it a very good Harman preference score of 78 with a 1.57 dB spread. The tradeoff: An 8 dB peak near 8.2 kHz can make cymbals and sibilance sound sharp.
Why pick the 7Hz Sonus II: A hybrid dynamic and planar in-ear with a 76.5 preference score, a smooth 1.7 dB deviation and slightly warm, natural bass. Watch for: The 3 to 6 kHz presence range sits nearly 4 dB under target with a 5.2 dB dip near 6 kHz, so vocals and guitars can sound a little distant and less crisp.
Buy the Hidizs MK10. It is rated higher for sound quality than the 7Hz Sonus II and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Headphones rankings.
The median of 4 hobbyist measurements gives it a very good Harman preference score of 78 with a 1.57 dB spread.
Amazon $73.99 eBay
A hybrid dynamic and planar in-ear with a 76.5 preference score, a smooth 1.7 dB deviation and slightly warm, natural bass.
Amazon $75.99 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Hidizs MK10 | 7Hz Sonus II | |
|---|---|---|
| Price | $73.99 | $75.99 |
| Ranked | #191 of 1291 in In-Ear Headphones | #258 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 78 (median of 4 squig.link measurements, calibrated to AutoEQ) | 77 (median of 2 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.57 dB standard deviation | 1.66 dB standard deviation |
| Tonal Tilt | +0.12 (negative is warmer, positive brighter) | -0.45 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 1 planar magnetic) |
| Drivers | 1 x 10mm dynamic | 1 x dynamic + 1 x planar magnetic |
| Impedance | 32 ohms | 29 ohms |
| Sensitivity | 113 dB | 108 dB/V |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 10Hz - 20kHz (Manufacturer specified) |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the Hidizs MK10 from ankramutt, digaoreviews, fahryst and tdl; the 7Hz Sonus II from aftersound, bassaudio and jaytiss, all via squig.link.
Related Headphone Comparisons
How Hidizs MK10 compares with other leading options: