| 摘要 |
A speaker device of the present invention roughly comprises a cabinet ( 1 ) and a speaker unit ( 2 a). The speaker unit ( 2 a) is attached to an opening portion formed in a front surface of the cabinet ( 1 ). The speaker unit ( 2 a) has a back surface frame ( 3 a), a front surface frame ( 4 a), a first magnetic circuit ( 5 a), a second magnetic circuit ( 6 a), an edge ( 7 a), a damper ( 8 a), a diaphragm ( 9 a), a voice coil bobbin ( 10 a), and a voice coil ( 11 a). A non-magnet member ( 91 a) which is a portion of the diaphragm ( 9 a), the first magnetic circuit ( 5 a), and the second magnetic circuit ( 6 a) play a role as a negative stiffness mechanism to suppress an influence of an acoustic stiffness, thereby achieving a small-size speaker device capable of reproducing low-frequency sound.
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