The most current type of driver uses a lightweight diaphragm connected to a rigid basket, or frame, via flexible suspension that constrains a coil of fine http://www.gracedigitalaudio.com/ wire to move axially through a cylindrical magnetic gap.
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Full range drivers often employ an additional cone called a whizzer: a small, brilliant cone attached to the joint between the voice coil and the primary cone
- The whizzer cone extends the high frequency response of the driver and broadens its flying frequency directivity, which would otherwise be greatly narrowed due to the outer diameter cone material failing to keep up with the central shout coil at deficient frequencies.