Patent ID: 8175320

Claim:
A coaxial loudspeaker for reproducing an electrical sound signal comprising: a magnetic driver assembly having a top end portion defining a first annular slot of a first circumference and an opposed bottom end portion defining a second annular slot of a second circumference, the first annular slot being coaxial with the second annular slot, and each annular slot establishing a permanent magnetic field therein, the magnetic driver assembly including: a cylindrical yoke having a cylinder body and a top inward flange; a top pole piece having a pole body and a bottom outward flange, the cylindrical yoke being coupled to the top pole piece; and a ring magnet attached to the cylindrical yoke and the top pole piece; wherein a portion of the pole body is spaced in an opposed relation to the top inward flange to define the first annular slot, and a portion of the cylinder body is spaced in an opposed relation to the bottom outward flange to define the second annular slot; and first and second voice coils positioned within the respective one of the first and second annular slots; wherein each of the first and second voice coils are axially driven based upon interactions between the electrical sound signal delivered thereto and the corresponding one of the permanent magnetic fields, the first voice coil being driven independently of the second voice coil.