• Beryllium
  • Beryllium
  • Beryllium
  • Beryllium
  • Beryllium
  • Beryllium
  • Beryllium
  • Beryllium




Applied Material Properties: Be

Beryllium is among the least dense stable metals, but also has among the highest Young’s modulus values (a ratio of the stiffness) and speed of sound. 

This results in high efficiency and extremely low distortion as the diaphragm does not bend on its own, moves homogeneously, and dissipates internal energy very well.

This rare combination of performance attributes is what endows the Be IEM’s with their freakish ability to compete with the best Beryllium transducer-based headphones on the market, at any price.

Still not sure that this IEM is for you?  Then use our amazing Select-A-Tron to guide your IEM choice!

Is there a measurement that demonstrates clarity?

Yes! A “waterfall plot” is one of the measurements our team performs when designing transducers, and acoustic systems in general.

Listening to a system that has a poor waterfall plot measurement is like wearing the wrong prescription glasses. Everything is out of focus.

Conversely, a system with a fantastic waterfall plot measurement is like 20/20 vision for your ears. Tremendous clarity.

Our proprietary 10mm Beryllium transducer has insane waterfall plot measurements:

How does a good waterfall plot improve the overall sound experience?

A favorable waterfall plot has a direct correlation with the perception of how ‘real’ something sounds, and the systems ability to accurately render the depth and breadth of a recording.

Mechanical Elements

Transducer Diaphragm: Beryllium

Transducer Surround: Bonded PEEK

Transducer Basket: Aluminum

Transducer Magnet: N48H Grade Neodymium

Enclosure Body: Polycarbonate

Protective Grille: 316 Stainless Steel

Bonding Compound: Cyanoacrylate Adhesive

Sealant Compound: Polyvinyl Acetate

Mounting Tips: Medical Grade Silicone and Urethanes

All components are finite element analyzed for stress, strain, and durability.

Included Accessories

Single Flange Tips – Small, Medium, Large

Dual Flange Tips – Small, Medium, Large

Memory Foam Tips – Small, Medium, Large

Protective Travel Case

Gold Plated ¼” TRS Adapter Jack

Gold Plated Dual Mono Airplane Adapter



Frequency Response 12 Hz to 45 kHz
Impedance 32 Ohms nominal
Sensitivity 100 dB SPL at 1mW in ear
Power Handling 200 mW continuous
Peak SPL 123 dB
THD Less than 1% THD at 1mW
Physical Properties
Cable Length 1.5 m
Mass 2.8 / 9.3 g (IEM/Set)
Operational Temperature -20 to +50° C
Operational Humidity 0-95% Relative Humidity
NRR 31.3 dB (foam eartrip)
Overall Length 21 mm
Body Diameter 12 mm
Nozzle Diameter 6 mm
Material Properties
Melting Point 1560 Kelvin
Speed of Sound 12890 meters per second
Young's Modulus 287 Gigapascals
Brinell Hardness 1320 Megapascals