| 摘要 |
The invention provides a loud speaker (1) or a magnet structure (4) for a loudspeaker having an annular magnetic gap for receiving a voice coil (8) and means for centering the voice coil within the annular gap while allowing for pistonic movement, having a voice coil with a length of at least 75 % of the thickness of the top plate (2) and a top plate (2) of at least 50 % greater thickness than it would have if it were operated at the point of magnetic saturation and a pole piece extending beyond the top plate (2) by an amount sufficient to remain in proximity to the voice coil (8) at all points in the reciprocation of the voice coil (8) and preventing the voice coil (8) from becoming misaligned with the gap even at high power levels and large excursions, having a plurality of ceramic ring magnets (4, 5) in a stacked configuration and wherein the increased thickness of the top plate (2) increases the distance from the center of the voice coil (8) in the resting position to the back plate (6). The design permits greater power handling capacity and larger excursions in bass sound reproduction. |
