Patent ID: 7245739

Claim:
A loudspeaker apparatus comprising: a frame having an opening portion; a magnetic circuit constructed within the opening portion: a voice coil in which a rear opening end portion is inserted into a magnetic gap of the magnetic circuit; a dome type diaphragm covered over a front opening end portion of the voice coil; and an edge member holding an outer peripheral portion of the voice coil freely vibratingly and having an outer peripheral edge attached on the opening portion of the frame, wherein an outer peripheral edge of the dome type diaphragm is positioned outside an outer peripheral side of the voice coil and the outer peripheral edge terminates without contacting any other portion of the loudspeaker apparatus and has a shape of being folded back in a direction of a sound radiated from a front face of the dome type diaphragm, and the outer peripheral edge is located on a front side of the edge member.