Patent ID: 6863152

Claim:
A loudspeaker with removable/replaceable cone and voice coil comprising: a frame having a bottom surface with a side portion extending upward from, and surrounding, said bottom surface, said side portion terminating in an exterior edge of a uniform height above said bottom surface and said exterior edge defining an opening having a first predetermined size and shape; a stiff diaphragm having an outer edge, a top surface and a bottom surface; said stiff diaphragm has 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; a first flexible suspension surrounding the outer edge of the diaphragm having an inner edge attached to the outer edge of the diaphragm and an outer edge attached to the exterior edge of the frame, with the combination of said diaphragm and first suspension having a size and shape that is substantially the same as the first size and shape; an audio motor including: a magnet mounted centrally to the bottom surface of the frame; a thin walled bobbin having a first length, a first diameter, and first and second ends; and a voice coil wound closest to the first end of the bobbin; wherein the second end of the bobbin is attached centrally to the bottom surface of the diaphragm to move the stiff diaphragm, when the first suspension is coupled to the frame, 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; a first cylinder having a second length that is shorter than the first length, and an inner diameter that is larger than the combined first diameter of the bobbin and a thickness of the voice coil wound thereon; and a second flexible suspension attached to, and surrounding, an outer surface of said first cylinder, and extending and attached to a point on an interior surface of the side portion of the frame between the exterior edge and the bottom surface of the frame; wherein when the loudspeaker is assembled the end of the bobbin with the voice coil thereon extends through the first cylinder and interacts with the magnet.