Patent ID: 8837768

Claim:
An apparatus, comprising: an electro-acoustic transducer comprising a front radiating surface that moves along a transducer axis; an open frame that carries the transducer, wherein the frame lies generally in a frame plane and defines opposed first and second mounting surfaces, wherein the transducer axis is generally parallel to or coincident with the frame plane; an enclosure made from hollow first and second enclosure members, each enclosure member made at least in part of plastic foam; wherein the first enclosure member has an inner peripheral surface that is complementary to the first mounting surface of the frame; wherein the second enclosure member has an inner peripheral surface that is complementary to the second mounting surface of the frame; wherein the inner peripheral surface of the first enclosure member is coupled to the first mounting surface of the frame; wherein the inner peripheral surface of the second enclosure member is coupled to the second mounting surface of the frame; and wherein the first and second enclosure members define interior volumes that communicate through the open frame, to create an enclosure volume behind the transducer diaphragm.