Patent ID: 7058195

Claim:
A speaker comprising: (a) a magnet assembly including at least one magnet having an axial magnetization; the magnet assembly including first and second opposed outer pole faces and a magnetic field that emanates radially outwardly in a direction transverse to the axial magnetization; (b) a conductive drive coil having an outer size and an inner size; the coil having a height dimension and a width dimension, the width dimension being defined as the distance between the coil's inner and outer sizes; the drive coil's width dimension being at least as great as the height dimension; the drive coil being located in the radially emanating magnetic field of the magnet assembly; a space existing between the at least one magnet and the drive coil so that during use the drive coil is not in physical contact with the at least one magnet; the drive coil moving along an excursion path, at least a portion of the excursion path being located between the first and second outer pole faces; and (c) a diaphragm connected to one of the magnet assembly and the drive coil; wherein, as assembled, the drive coil is mounted in close proximity to the magnet assembly such that relative axial motion may occur between them during use; and wherein electric current in the drive coil causes relative motion between the magnet assembly and the drive coil, such relative motion further causing physical movement of the diaphragm to produce sound.