Binary EP321 MEMS 2DD + 3BA + 1 MEMS Driver IEMs

*The curve is measured by a third party and is for reference only.

💡About EP321 MEMS Driver👇

The EP321 is equipped with an ultra-compact MEMS tweeter unit, with a package size of only 15.4mm³, which may be the smallest MEMS speaker unit in the audio industry today. Based on PZT thin-film piezoelectric technology, the diaphragm and driving structure are integrated and fabricated entirely using MEMS processes. In terms of acoustic performance, it offers excellent high-frequency extension and can easily extend beyond 40kHz, delivering an exceptional sound quality experience that meets Hi-Res certification standards.

To achieve the required sound pressure level (SPL) technical specifications, existing piezoelectric MEMS speaker solutions on the market currently need an additional dedicated PA chip to maintain a high drive voltage. The new MEMS unit on the EP321 can easily achieve SPL≥100dB @ 6kHz~40kHz with just a 1Vrms drive voltage, meaning it can deliver high-fidelity treble audio directly using existing headphone driving equipment without PA amplification, significantly lowering the application threshold for new MEMS speaker technologies.

Benefiting from excellent MEMS structural design and semiconductor process capabilities, it has outstanding response speed and consistency in sound pressure level (±1dB) and phase (±1°). Unlike similar products in the audio industry that use surface mount and wire bonding packaging schemes, it adopts AAC's specially developed "quasi-flip-chip" packaging process, achieving high reliability while ensuring high performance and ultra-compact package size.

Features:-

>World’s First Direct Drive MEMS Hybrid IEMs.

>Six-Driver Tribrid Setup Each Side.

>Dual Dynamic Drivers(1 Active+1 Passive).

>Three Balanced Armature Drivers.

>One Direct Drive MEMS Driver Unit.

>Professionally Designed Three-Way Frequency Crossover Design.

>Strong Details, Rich Tonality, Engaging Sound Profile.

>Exciting Design With Stainless Steel Face Panels.

>Face Panels have Irregular Geometric Elements.

>High-Precision 3D Printed Ear Cavity.

>Easily Swappable Detachable Cable.

>Standard 0.78mm 2-Pin Connectors.

>High-Quality Stock Ear Tips.

Technical Information:-

>Driver Setup: 10mm DD+ 6mm Passive Diaprhagm+3BA+1 MEMS.

>Impedance: 13Ω@1kHz.

>Sensitivity: 122dB/Vrms.

>Frequency Response: 8Hz~40kHz.

>THD+N: <1%.

>Connector Type: 0.78mm 2-Pin.

>Termination Plug: 3.5mm/4.4mm.

>Weight: 7.5 grams.

Binary is super excited to announce its latest pair of multi-driver hybrid IEMs, the Binary EP321. It’s the world’s first pair of in-ear monitors with Direct Drive MEMS driver technology. The pair houses a six-driver tribrid configuration featuring dual dynamic drivers(one 10mm dynamic driver and one 6mm Passive Radiator), three Balanced Armature Drivers, and one Direct Drive MEMS driver. With the advanced MEMS driver unit, the pair boasts exceptionally clear high-frequency response with faster transients and crisp definition. Binary has designed the pair with a stunning, eye-catching design featuring CNC-machined stainless steel face panels with irregular geometrical patterns that reflect different colours upon different light angles. The housings are 3D printed with high-quality resin material in an ergonomic shape, ensuring a comfortable wearing experience for the users!!

Powerful, Clean, and High-Resolution:-

Binary EP321 is an IEM that brings a true high-resolution sound quality to its listeners. The pair houses a six-driver tribrid configuration, arranged together in a precise crossover for unmatched performance. Binary has equipped dual dynamic drivers, three balanced armature drivers, and one direct drive MEMS driver technology on each side. We can simply say, the 321 in the name of the EP321 showcases its driver setup!! Each driver is carefully chosen and professionally implemented to get a powerful, clean, and high-resolution sound output.

The Innovative MEMS Technology Is Here:-

Binary EP321 is the world’s first IEM with the Direct Drive MEMS technology. MEMS drivers usually require an additional amplifier, however, Binary has implemented it with a built-in energizer that powers this Direct Drive MEMS driver swiftly. It is implemented for the ultra-high-frequency band, prepare yourself to hear unbeatable performance in the ultra-high-frequency band because the innovative MEMS is enriching it with super-fast transients, clean, and high-resolution performance. Treble region on the EP321 has an exceptionally clean and precise response with no noticeable sharpness, a signature loved by audiophiles worldwide

Passive+Dynamic, Dual-Driver Bass Module:-

Binary EP321 features a dual-dynamic driver setup that produces an impressively clean lower-end response. The pair houses a 10mm dynamic driver and a 6mm passive diaphragm. This setup allows the pair to produce a strong and sensational bass response. Talk about solid rumble in the sub-bass region, or a punchy, dynamic mid-bass, the EP321 handles the lower-end with full precision and quality.

Three High-Performance Balanced Armature Drivers:-

Complementing the solid bass and exquisite ultra-high frequency details, we have three high-performance balanced armature drivers. There’s one full-frequency BA driver that delivers exquisite details into the midrange section and a composite dual BA driver setup that delivers an accurate, extended high-frequency band for seamless integration with the DD and MEMS drivers. Together with a precise crossover system, this multi-driver arrangement is designed for seamless performance.

3D Printed Build, Exquisite Designs:-

Binary EP321 is fully exquisite and rich in terms of Design. The pair features CNC-machined stainless steel material face covers. They feature irregular geometrical patterns that reflect different colours upon different light angles falling on them. This gives the pair a very unique and appealing look. As for the shells, they are crafted using a high-precision 3D printing process. They have a comfortable design ensuring supreme comfort even after long listening hours.