Patent ID: 6650760
Filing Date: 2003-11-18
Classification: H04R

Abstract:
An upper bass/low mid loudspeaker comprising: an electro-acoustic driver having a conical diaphragm; and a housing and a central member defining therebetween a single channel for propagation of sound from a front of said diaphragm, said central member having a first portion extending into a volume defined by said diaphragm and defining with said diaphragm a first region of said channel of ring-shaped cross-section having a transverse cross-sectional area which increases in a direction of sound propagation within said channel, said central member having a second portion disposed within a first portion of said housing to define a second region of said channel of ring-shaped cross-section having a transverse cross-sectional area which decreases in said direction of sound propagation within said channel, said housing having a second portion defining a throat extending from said second region and a third portion defining a horn extending from said throat.