Compound Direct Radiator Loudspeaker

Abstract

The closed cabinet, with or without a port, has become the standard mounting arrangement for a direct radiator loudspeaker mechanism for high fidelity sound reproducing systems. One of the objections to the cabinet for these systems is the large size required to obtain adequate low frequency response. The effective volume of a small cabinet may be increased by the use of an auxiliary loudspeaker mechanism which drives the radiating loudspeaker mechanism. This system has been termed a compound direct radiator loudspeaker. The use of the compound direct radiator loudspeaker makes it possible to obtain low frequency response comparable to that of the conventional wide range system but in a cabinet having only a fraction of the volume of the cabinet in the conventional system.