Patent ID: 6675931
Filing Date: 2004-01-13
Classification: H04R

Abstract:
A shallow mount, loudspeaker comprising:a low height frame having an interior bottom surface with a side portion extending upward from, and surrounding, said interior bottom surface, said side portion terminating in an exterior edge of a uniform first height above said interior bottom surface and said exterior edge defining an opening into the frame having a first predetermined size and shape; a stiff diaphragm having an outer edge, a top surface and a bottom surface; said stiff diaphragm having a second size that is smaller than said first size and is substantially the same shape as said opening defined by the exterior edge of the frame, with the outer edge of said stiff diaphragm defining two closely spaced mounting surfaces therearound; a dual suspension system having first and second flexible suspension portions separated a predetermined distance from each other with the first suspension portion connected between the exterior edge of the frame and the mounting surface closest to the top of the stiff diaphragm and the second suspension portion connected between a point within, and spaced from the exterior edge of, the frame and the mounting surface of, and closest to the bottom of the, stiff diaphragm; and an audio motor including a magnet, a thin walled bobbin and a voice coil wound on the bobbin with the magnet mounted within the frame and having a second height that is less than the first height, and with one edge of the bobbin attached centrally to the stiff diaphragm to move the stiff diaphragm inward and outward relative to the bottom surface of the frame in response to an electrical signal applied to the voice coil that interacts with the magnet to move the bobbin and attached diaphragm.