Patent ID: 8249290

Claim:
A speaker comprising: a frame; a magnetic circuit disposed in the frame and having a magnetic gap; a voice coil disposed movably with respect to the magnetic gap in the magnetic circuit; a diaphragm having an inner circumferential edge coupled to the voice coil, and an outer circumferential edge coupled to the frame via a first edge; and a suspension holder coupled to a backside of the diaphragm and having an outer circumferential edge coupled to the frame via a second edge; wherein the frame has a block construction including a first frame part and a second frame part, and an outer circumferential edge of the second edge is sandwiched between the first and second frame parts; and wherein the first edge has a shape symmetrical to a shape of the second edge; and wherein the first edge has a ring shape surrounding the diaphragm and the second edge has a ring shape surrounding the suspension holder, and a diameter of the ring shape of the first edge and a diameter of the ring shape of the second edge are equal to each other.