For example, organ is light and about well damped, but not stiff; accelerate can be counterfeit stiff and light, but it is not mostly well damped; plastic can be light, but typically the stiffer it is made, the less well-damped it is. As a result, crowded cones are factitious of some character of composite material. This can be a matrix of fibers including Kevlar or fiberglass, a layered or bonded sandwich construction, or simply a coating applied to stiffen or damp a cone.

• The wire in a articulation coil is mostly made of copper, though aluminum, and rarely silver, may be used

• Voice coil wire cross sections can be circular, rectangular, or hexagonal, giving varying amounts of wire volume coverage in the magnetic http://www.gracedigitalaudio.com/ gap space.