Full range drivers often employ an additional cone called a whizzer: a small, light 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 high frequency directivity, which would otherwise be greatly narrowed due to the outer diameter cone material failing to keep up with the central voice coil at higher frequencies.

A subwoofer is a woofer driver used only for the lowest part of the audio spectrum: typically below 100-120 Hz. Because the intended range of frequencies in these is limited, subwoofer system design is usually simpler in many respects than for conventional loudspeakers, often consisting of a single subwoofer driver enclosed in a suitable cabinet or enclosure.

Wireless Outdoor Speakers