Abstract: A transducer design (50) can include a transducer assembly (60, 59 and 56) having a frontal area (61), a housing (52) having a main port (64) forming a portion of a main volume (61, 62, and 70), and an area (58) defining a back volume. The back volume is contiguous with the main volume and the frontal area substantially enclosed by the housing defines at least a portion of the main volume. A main volume path (63) and a back volume path (65) can be combined within a common region (62). The main volume and back volume paths can be further defined using a sheet metal transducer (74) and a felt element (72) placed within the common region.