Whizzer Cone

A small supplementary cone attached to the voice coil of a speaker for the purpose of producing and radiating high frequency content more effectively than the larger speaker cone. A whizzer cone is attached to the voice coil in the same place as the speaker cone; however, where whizzer cones are used it is necessary for there to be some additional flexibility in the joint between the speaker cone in the voice coil. This allows the speaker cone to become somewhat decoupled from the higher frequency motion of the voice coil so it doesn’t dampen the voice coil from being able to move the whizzer cone at those higher rates. Whizzer cones have fallen out of popularity in the last couple of decades, mostly due to the added coloration of the signal produced by the necessary slop in the coupling between the speaker cone and voice coil.