The Binary EP321 ranks #181 out of 421 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Binary
Prices on this page were last checked October 10, 2026 at 5:37 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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#181 Binary EP321: $309.99 Amazon eBay
| Released | Feb 2026 (8 months ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.61 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 passive radiator + 3 balanced armature + 1 MEMS) |
| Drivers | 1 x 10mm dynamic + 1 x 6mm passive radiator + 3 x balanced armature + 1 x MEMS |
| Form Factor | In-ear |
| Frequency Response | 8Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 77 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 13 ohms |
| Sensitivity | 122 dB SPL/V |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Tonal Tilt | -0.46 (negative is warmer, positive brighter) |
| Weight | 0 lbs (7.5 g) |
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