HiFiGo Binary EP321
The world's first direct-drive MEMS driver eliminates the need for a special amplifier, delivering 40kHz high-frequency resolution from any standard 3.5mm device. Its 6-driver hybrid array combines a 10mm dynamic driver with a 6mm passive radiator for fatigue-free, controlled bass, housed in lightweight 7.5-gram 3D-printed resin shells with iridescent CNC steel faceplates. This IEM is best for musicians and audiophiles seeking studio-monitor precision and natural vocal separation for critical listening or mixing.
form factor in-ear
driver type hybrid
34 Overall Score
Price $310
Snapshot
The proof
Performance
Specifications
Full Specifications
Design
| Form Factor | in-ear |
| Ear Tips | XS, S, M, L |
Audio
| Driver Type | hybrid |
| Driver Size | 10 |
| Drivers | 6 |
| Freq Max | 40000 |
| Impedance | 13 |
| Codecs | HiFiGo Binary EP321 MEMS in-Ear Monitor, Direct-Drive MEMS Earphones, 3BA +2DD+1MEMS Hybrid IEM with Iridescent CNC Stainless Steel Faceplates for Musician Audiophile (3.5mm) |
Connectivity
| Wired Connector | 3.5mm |
Earbud Battery
| Charging | USB-C |
Case Battery
| Case Charging | USB-C |
Microphone
| Microphone | Yes |
vs Competition
| Spec | HiFiGo Binary EP321 | Technics EAH-AZ100 EAH-AZ100-K | Sony WF-1000XM6 | Samsung Galaxy Buds3 Pro | Bose QuietComfort Ultra 896637-0010 | Apple AirPods Pro 3 |
|---|---|---|---|---|---|---|
| Form Factor | in-ear | in-ear | in-ear | in-ear | in-ear | in-ear |
| Driver Type | hybrid | dynamic | dynamic | dynamic | dynamic | dynamic |
| Wireless | - | true | true | true | true | true |
| Active Noise Cancellation | - | true | true | true | true | true |
| Bluetooth Version | - | 5.3 | 5.3 | 5.4 | 5.3 | 5.3 |
| Battery Life Hours | - | 8 | 8 | 6 | 6 | 8 |
| Case Battery Hours | - | 28 | 24 | 26 | 18 | 24 |
| Water Resistance | - | IPX4 | IPX4 | IP57 | IPX4 | IP57 |
| Multipoint | - | true | true | true | true | true |
| Compare | Compare | Compare | Compare | Compare |
| Product | Anc | Mic | Build | Sound | Battery | Comfort | Connectivity | Social Proof |
|---|---|---|---|---|---|---|---|---|
| HiFiGo Binary EP321 | 31.8 | 44 | 35 | 98.1 | 48.7 | 29.8 | 35.3 | 30.6 |
| Technics EAH-AZ100 EAH-AZ100-K Compare | 97.4 | 97.5 | 81.4 | 99.1 | 82 | 73.8 | 99.2 | 81.4 |
| Sony WF-1000XM6 Compare | 97.4 | 99.8 | 81.4 | 89.2 | 79.2 | 73.8 | 99.2 | 81.4 |
| Samsung Galaxy Buds3 Pro Compare | 97.4 | 97.5 | 98.9 | 93.5 | 76.9 | 94.7 | 99.7 | 90.3 |
| Bose QuietComfort Ultra 896637-0010 Compare | 97.4 | 91.9 | 81.4 | 97 | 48.7 | 94.7 | 98.1 | 90.3 |
| Apple AirPods Pro 3 Compare | 97.4 | 83.9 | 98.9 | 91.5 | 79.2 | 94.7 | 99.7 | 99.4 |
Price
Value & Pricing
From $310
