Patent ID: 8682022

Claim:
A loudspeaker, comprising: a bottom plate being formed from a material capable of transmitting a magnetic flux, said bottom plate including: a bottom portion being a first ring having a central opening; an inside portion having a first, hollow, cylindrical form; said inside portion being affixed to, and extending upwardly from, said bottom portion; and said inside portion encircling said central opening in said bottom portion; and, an outside portion having a second, hollow, cylindrical form; said outside portion being affixed to, and extending upwardly from, said bottom portion; and said outside portion encircling said inside portion; a magnet having a third, hollow, cylindrical form; said magnet being affixed to, and extending upwardly from, said bottom portion between said inside portion and said outside portion; and said magnet being spaced away from said outside portion; a top plate being a second ring formed from a material capable of transmitting a magnetic flux, said top plate being affixed to, and extending outwardly from, the top of said magnet; and said top plate being laterally spaced away from said outside portion so as to define an air gap between said top plate and said outside portion; a diaphragm for producing audible sounds, said diaphragm including: a bobbin portion being positioned within said air gap and being capable of free movement in said air gap; a suspension portion being positioned at the center of said magnet; and, a sound-producing portion being affixed to the top of said bobbin portion and being affixed to the top of said suspension portion; and, a resilient spider connecting said suspension portion of said diaphragm to the top of said inside portion of said bottom plate; and, a voice coil being wound around, and being affixed to, said bobbin portion within said air gap.