| 摘要 |
PURPOSE:To drastically lower a peak in the vicinity of a high zone limit frequency by providing a cup-shaped coupling cone for connecting a plane plate diaphragm and a voice coil. CONSTITUTION:The cup-shaped coupling cone 17 for connecting the plane plate diaphragm 18 and the voice coil 14 is provided. Said coupling cone 17 has a concave-shaped section (cup shape) and formed by paper, light metal foil, resin film and the like. In such a manner, by adopting the concave-shaped coupling cone 17, a high zone limit frequency value is naturally lowered a little, and almost the peaks in the vicinity are removed. |
