| 摘要 |
1468787 Moving coil loud-speakers ALLISON ACOUSTICS Inc 23 April 1975 [1 May 1974] 16855/75 Heading H4J A moving coil loud-speaker is arranged such that the major sound transmission is from the rear concave surface 12 of an exponentially shaped cone diaphragm 10. To this end the magnet assembly may be mounted within the volume bounded by cone 10 on a support member 13 as shown or only partially within the volume (Fig. 1, not shown) in which case the mounting panel 13 is flat. |
