| 摘要 |
PURPOSE:To obtain a full range speaker having an affluent low sounds because a double cone speaker is made into a multivibration system by sticking a subcone to a voice coil, adhering a weight addition to the center and setting the outer diameter of the weight addition at least larger than the inner diameter of the subcone center part. CONSTITUTION:The center part of a conical paper 8 jointed to a frame whose peripheral part is jointed to a magnetic circuit through an edge is jointed to the outside of the upper part of the voice coil 6 by an adhesive. The bottom- shaped subcone 9 is inserted in the upper inside, and in the center the weight addition 10 made of a soft rubber ring is incorporated and jointed by an adhesive. In terms of the dimensional relationship between the weight addition 10 and the subcone 9, the inner diameter phiB in the center of the subcone 9 is larger than the outer diameter phiA of the weight addition 10, and the weight addition 10 has dimensions capable of being incorporated directly in the voice coil 6.
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