Patent ID: 6330340
Filing Date: 2001-12-11
Classification: H04R

Abstract:
A loudspeaker, comprising:a motor structure with a movable voice coil, said voice coil including a former having a hollow interior and an outer surface which mounts a wire winding;a frame having an upper end and a lower end, said lower end being connected to said motor structure;an upper suspension connected to said upper end of said frame;a diaphragm having an upper end connected to said upper suspension and a lower end, said lower end of said diaphragm being formed with an inner surface, an outer surface spaced from said inner surface and a number of spaced vent bores located between said inner and outer surfaces, said inner surface of said lower end of said diaphragm being connected to said voice coil, a cavity being formed in an area at least partially defined by said diaphragm and said voice coil; anda lower suspension connected at one end to said frame and at the other end to said lower end of said diaphragm.