Image © BinaryBinary EP321 MEMS
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At a glance
- Brand
- Binary
- Type
- Wired IEMs
- Fit
- -
- Connection
- Wired
- Noise cancelling
- No
- Released
- 2025
A wired six-driver tribrid IEM combining a dynamic/passive bass module, three balanced-armature drivers and a direct-drive MEMS driver. Binary positions it for audiophiles seeking high-resolution sound and extended ultra-high-frequency performance.
The HearWiki takeAI-condensed
This wired IEM packs a six-driver tribrid setup with two dynamics, three balanced armatures, and one MEMS unit, aiming for detailed, high-resolution audio with extended treble. Its lightweight metal-free build and detachable 2-pin cable make it a portable option for enthusiasts. Priced around $310, it focuses on pure wired performance without any ANC features.
What works
- Intricate tribrid driver array for layered sound
- Lightweight 7.5g design for comfortable wear
- Detachable 0.78mm 2-pin cable for easy upgrades
- Low 13-ohm impedance suits most sources
What doesn't
- No active noise cancellation
- Requires a good source to manage low impedance
- MEMS driver may sound bright to some listeners
Paraphrased from published reviews & specs - not an original hands-on test. Our AI disclosure.
Specifications
| Driver | 2DD + 3BA + 1MEMS tribrid |
|---|---|
| Driver type | tribrid |
| Driver configuration | 2DD + 3BA + 1MEMS |
| Drivers per side | 6 |
| Impedance | 13 Ω |
Audio
| Driver | 2DD + 3BA + 1MEMS tribrid |
|---|---|
| Driver type | tribrid |
| Driver configuration | 2DD + 3BA + 1MEMS |
| Drivers per side | 6 |
| Impedance | 13 Ω |
Design
| Weight | 7.5 g |
|---|---|
| Detachable cable | Yes |
| Connector | 2-pin 0.78 mm |
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