Loudspeaker

摘要

A magnetic assembly and a loudspeaker a magnetic assembly. The magnetic assembly has a pole piece that is designed to form an outer air gap and an inner air gap for coaxial voice coils of the loudspeaker. The same magnet is used for the magnetic circuits of the two voice coils. The pole piece is shaped to split the magnetic circuits into a low frequency magnetic circuit and a high frequency magnetic circuit. A convex dome is attached to the high frequency voice coil.

主权项

1. A magnetic assembly for a loudspeaker comprising:
a magnet for producing a magnetic field; a top plate provided adjacent a top surface of the magnet; a rear plate provided adjacent a rear surface of the magnet; a pole piece positioned adjacent the top plate and the rear plate, the pole piece having a through bore defining an inside surface of the pole piece, the inside surface of the pole piece facing the through bore; a first projection that projects into the through bore from said inside surface of the pole piece; a second projection that projects into the through bore of the pole piece from a surface of the rear plate; wherein the pole piece and the top plate are positioned adjacent each other to define a first air gap for a first voice coil; wherein the first projection and the second projection are arranged adjacent each other to define a second air gap within said through bore for a second voice coil.