| 摘要 |
A field assembly for a loudspeaker having a base plate, a front plate and a permanent magnet sandwiched therebetween, a cylindrical post being secured to the center of the base plate in such a manner as to leave a gap for the movements of a voice coil therein. The base plate is provided with an embossment creating additional space for voice coil travel. Instead of an embossment integral with the base plate, a separate disc member with a peripheral flange may be used.
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