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The head of a fixed-magnet and moving-coil loudspeaker is the piece of soft ferromagnetic material connected to the back of the permanent magnet on the one hand and the salad bowl on the other hand, for concentrating the magnetic flux of the permanent magnet around the voice coil; mobile coil driving, under the effect of the electrical signal which passes through it, the membrane, generally of conical shape, which produces the sound signal itself. code
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