Magnetic circuit for speaker with short-circuiting ring

摘要

A magnetic circuit for a speaker (1) comprises: a bottom yoke (3) including a center pole (2); a ring magnet (4); a top plate (5); and a short-circuiting ring (16) shaped like a hollow cylinder. The short-circuiting ring (16) is disposed close and parallel to a voice coil (12) and attached to an inner portion of the underside of the top plate (5).