The Be IEM has a 100% pure beryllium foil diaphragm with a bonded PEEK surround.  Delicate, furious, precise, overwhelming.   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 homogenously, and dissipates internal energy very well.

All components inside our IEMs was 100% designed and tooled in-house, resulting a totally unique product.  Each component was designed to do its function, be as light weight as possible, and easy to assemble.  All components are keyed so that assembly is nearly fool-proof.  All components were finite-element analyzed for stress, strain, and durability.

The sonic signature of the Be IEM is quite neutral.  Strong, even bass with a clear but balanced top end, the Be has vanishingly low THD and one of the best waterfall plots ever seen.  Winner of just about every award out there, the Be simply is the best $300 you can spend for any headphone – over, on, or in ear.  The fact it fits in your pocket is just icing on the cake.  Best suited for rock, jazz, classical, and country, it can do nearly any musical style with utter ease.

All our IEMs feature polycarbonate bodies for high strength and zero resonance, custom front-and-rear tuned volumes, Metal-Injected-Molded grade 304 stainless steel logo caps, butyl rubber strain reliefs, chemically etched grade 316 stainless steel grilles, and N48H grade magnets.  All bonded in precision alignment with cyanoacrylate adhesives and sealed with polyvinyl acetate.

Every IEM set comes with a full set of accessories.  We manufacture our own earbuds from medical grade silicones and urethanes, and we include small, medium, and large sizes of single flange, dual flange and foam units.  We stamp our own screw-top carry tin sized to fit inside the coin pocket of a pair of your favorite jeans.  And you’ll get adapters that let you use your IEMs with any equipment, whether at home (the 1/4″ gold plated adapter jack) or on the go (the lightweight, gold plated airplane adapter).

Not sure which model to get?  Use our Selectatron to help you make a decision.

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Frequency Response12 Hz to 45 kHz
Impedance32 Ohms nominal
Sensitivity100 dB SPL at 1mW in ear
Power Handling200 mW continuous
Peak SPL123 dB
THDLess than 1% THD at 1mW
Physical Properties
Cable Length1.5 m
Mass2.8 / 9.3 g (IEM/Set)
Operational Temperature-20 to +50° C
Operational Humidity0-95% Relative Humidity
NRR31.3 dB (foam eartrip)
Overall Length21 mm
Body Diameter12 mm
Nozzle Diameter6 mm
Material Properties
Melting Point1560 Kelvin
Speed of Sound12890 meters per second
Young's Modulus287 Gigapascals
Brinell Hardness1320 Megapascals