SPEAKER

PROBLEM TO BE SOLVED: To provide a speaker of low distortion which avoids collision of a voice coil and a voice coil bobbin in a magnetic air-gap, even at the time of large amplitudes. SOLUTION: A 1st and 2nd magnets 22 and 23 are magnetically magnetized in repelling directions, magnetic circuits are constructed by forming a main magnetic air-gap between the outer peripheral plane of a 1st center pole 21 and the inner peripheral plane of a yoke 28 and 1st and 2nd sub magnetic air-gaps b and c between the outer peripheral plane of a top plate 24 and an under plate 25 respectively, and the inner peripheral plane of a yoke 28, a voice coil bobbin 31 and a 2nd frame 29 are attached to the inner and outer peripheral parts of a 1st damper 22 respectively upper than the plate 24, and the bobbin 31 and a 1st frame 27 are attached to the inner and outer peripheral parts of a 2nd damper 33 respectively lower than the plate 25.