Abstract: A compound driver loudspeaker system combines a single exterior radiating loudspeaker with a plurality of internal auxiliary loudspeakers in a cabinet. The cabinet has an external baffleboard and an internal baffleboard, the external baffleboard having a single baffle cutout for receiving the radiating loudspeaker and a plurality of internal baffleboard cutouts for receiving each of the auxiliary loudspeakers. The baffleboards and loudspeakers define a desirable air chamber between them. The auxiliary loudspeakers are selected to be smaller than the radiating loudspeaker and the number of auxiliary loudspeakers is such that, taken together, they form an equivalent single driver which is matched to the radiating loudspeaker to provide the desired frequency performance of the loudspeaker system. Since the auxiliary loudspeakers are smaller than the radiating loudspeaker, the baffle cutout in the external baffleboard is larger than the cutouts in the internal baffleboard.