Loudspeaker including a cone circumscribed by a stiffener

1. A loudspeaker comprising:

a frame;

a cone having an outer edge in a shape of a reverse angle flange; and

a reinforcing ring bonded to a back side of the flange, said reinforcing ring being disposed entirely within a width of the flange.

2. The loudspeaker of claim 1 , wherein an interior angle of the flange is approximately ninety degrees.

3. The loudspeaker of claim 1 , wherein the reinforcing ring is made of carbon fiber.

4. The loudspeaker of claim 1 , further including at least one additional reinforcing ring circumscribing the cone.

5. The loudspeaker of claim 1 , further including a pleated surround connecting the outer edge of the cone to the frame, wherein an interior angle of the flange is such that a force exerted by the surround on the flange when the cone is at a maximum excursion is substantially in line with the plane of the flange.

6. The loudspeaker of claim 1 , further including a surround connecting the outer edge of the cone to the frame, wherein the surround comprises a plurality of wavelike pleats, the peak to peak height of the surround being greater than 0.5 times the distance between the pleats when the surround is at rest.

7. The loudspeaker of claim 1 , further including a surround connecting the outer edge of the cone to the frame, wherein the surround comprises a plurality of wavelike pleats, the peak to peak height of the surround being approximately equal to 0.7 times the distance between the pleats when the surround is at rest.

8. The loudspeaker of claim 2 , wherein said reinforcing ring is disposed at the interior angle of the flange.