| 摘要 |
PROBLEM TO BE SOLVED: To provide a loundspeaker system for composing a speaker box having sufficient weight and capacity, of a magnetic circuit for driving a diaphragm. SOLUTION: An outside yoke 110 has an opening part 112 on one end face. An inside yoke 120 has a main body part 120A arranged inside the outside yoke 110 and a center pole part 120B facing the inside of the opening part 112. Between the center pole part 120B and the opening part 112, a gap part 170 is formed. The outside yoke 110 and the inside yoke 120 are bonded through magnets 130A, 130B, 140A and 140B and apply magnetic fields to the gap part 170. A diaphragm 150 is arranged in the opening part 112, and a voice coil bobbin 160 provided on this diaphragm 150 is inserted into the gap part 170. A voice coil 162 is mounted on the voice coil bobbin 160 and arranged at a prescribed position in the gap part 170.
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