The NF Acous NM20 ranks #436 out of 668 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: NF Acous
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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#436 NF Acous NM20: $119 Amazon $119 eBay
Pros: The median of 10 hobbyist measurements gives it a solid Harman preference score of 70 with a 2.19 dB spread, and its mids sit within about 0.8 dB of target, so vocals and instruments sound natural. Bass is lifted about 4.1 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. It uses 1 x beryllium-plated dynamic with an easy 32 ohm load.
Cons: An 11.6 dB peak near 11.5 kHz can make cymbals and sibilance sound sharp. The 4.1 dB bass lift can sound boomy and mask midrange detail.
| Released | Oct 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.19 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x beryllium-plated dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz |
| Harman Preference Score | 70 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.4 dB at 30 Hz) |
| Tonal Tilt | +0.22 (negative is warmer, positive brighter) |
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