For example, paper is light and almost always well damped, but not stiff; leaf can be trumped-up stiff and light, but it is not regularly well damped; plastic can be light, but largely the stiffer it is made, the less well-damped it is. As a result, multifarious cones are plastic of some denomination of composite material. This can be a matrix of fibers including Kevlar or fiberglass, a layered or bonded sandwich construction, or directly a coating applied to stiffen or drizzly a cone.

The basket or frame must be designed for rigidity to avoid deformation, which will change the magnetic conditions in the magnet gap, and could even cause the voice coil to shine against the walls of the magnetic gap. Baskets are habitually cast or stamped Wireless Outdoor Speakers metal, although molded plastic baskets are cute common, especially for inexpensive drivers. The frame also plays a considerable role in conducting torridity away from the coil.