| 摘要 |
A diaphragm for a loudspeaker drive unit ( 1 ), the diaphragm comprising a block of material having a first, sound-radiating front face ( 20 ) and a second, rear face ( 22 ). The block is stiffened by being bound about over the first and second faces ( 20,22 ) by a multiplicity of turns of one or more elongate members of flexible material ( 36 ) stiffened by a stiffening composition.
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