Beryllium is a rare chemical element (Be) with low mass, high tensile strength and high thermal stability.
It is incredibly rigid and lightweight; everything an audio engineer desires in a speaker cone. In fact, Beryllium has been used in the audio industry since the 1970s. Because of its use in only the finest (and most expensive) audio equipment, it has retained a certain "cult" status.
Precise control of the manufacturing process produces Beryllium with a highly uniform grain structure. This material is many times more rigid and less dense than more common cone materials. In industry testing, our Beryllium cone material exhibits substantial improvements in durability, speed, and reduced interference. It can add more than an octave of distortion-free output.