Patent ID: 6278787
Filing Date: 2001-08-21
Classification: G07F,H04R

Abstract:
A mid/high frequency loudspeaker drive unit comprising a stiff lightweight resonant panel form member, a housing to which the panel form member is mounted, a resilient suspension connected between the edges of the panel form member and the housing, the arrangement being such that the housing and the panel form member together define a closed cavity, and an electrodynamic exciter for applying bending wave energy to the panel form member to cause it to resonate to produce an acoustic output, the exciter comprising a magnet assembly rigidly fixed to the housing and defining an annular gap, and a voice coil and coil former assembly disposed in the annular gap and rigidly fixed to the panel form member near to the geometric center thereof, wherein only said resilient suspension centers the voice coil and coil former assembly in the annular gap.