Aluminum exhibits an exceptional stiffness to density ratio, allowing for an extremely light-weight, yet rigid cone. The low weight of the dome allows for extremely quick reactions to the input signal. That translates to transient response specifications difficult to approach by any other material.

In the past, light-weight cones were plagued by high distortion ratings, simply because the cone material would flex under the strain of the high frequency motion demanded by the input signal. Aluminum changed that by adding very high strength to a light-weight material, able to retain its structural integrity over a wide range of frequencies, and through much higher power bands.

As a result, the aluminum done tweeter is said to produce a fluid yet accurate sound field, with pin-point imaging, and an accuracy that reveals a higher level of detail and texture unatainable with softer materials.