Periodic Audio Beryllium Detachable Cable In-Ear Monitors - High Fidelity IEMs for Audiophiles, Musicians & Studio Recording

Let It Be
Be (Beryllium) is our highest-awarded IEM. It is known as the master-of-all-music, failure-at-none. Our other IEMs may do better in some genres but for all-around excellence, Be is where most end their search. Revealing enough to be a true reference IEM but forgiving enough to use on any source.

Beryllium is among the lowest density stable metals but also has among the highest Young’s modulus values (a ratio of the stiffness) and a very high internal 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 IEMs with their freakish ability to compete with the best Beryllium transducer-based headphones on the market, at any price.

I See a Detachable Cable? What’s That About?
We have also developed our own 2.5mm jack: the IDEEL connector. This connector is the world’s smallest 2.5mm jack, measuring just 3.6mm across, and a tiny 9.5mm mounting depth. This jack allows us to use the very robust 2.5mm TS plug in our tiny IEMs. No more delicate MMCX or difficult 2 pin plastic connectors needed.

Mechanical Elements

Transducer Diaphragm: Beryllium

Transducer Surround: Bonded PEEK

Transducer Frame: 316 Stainless Steel

Transducer Magnet: N48H Grade Neodymium

Enclosure Body: Tritan™ copolyester

Protective Grille: 316 Stainless Steel

Bonding Compound: Cyanoacrylate Adhesive

Sealant Compound: Polyvinyl Acetate

Mounting Tips: Medical Grade Silicone and Urethanes

Connector: IDEEL 2.5mm TS compatible connector (tip hot, sleeve ground)

All components are Finite Element Analyzed for stress, strain, and durability.