Abstract: An inner suspension system for a speaker assembly comprising a center spider, an intermediate spider, and a linear spider. The system reduces distortion of the output from the speaker and increases axial integrity of the movement of the cone. The center spider and intermediate spider are disk shaped and are each attached to the frame of the speaker assembly and to different points on the voice coil former. The linear spider, on the other hand, is cylindrically shaped and is attached to the pole piece of the magnetic motor structure, and the cone converges upon the other end of the cylindrically shaped linear spider.

Abstract: A speaker box with improved low frequency response. Three chambers of specified proportion are provided which allow vibration of both front-cone and rear-cone sound waves projected from an internally installed low frequency speaker. Housing is provided for one or more higher frequency speakers, further providing rear covers to protect the speakers from low frequency sound wave interference. Ports are also provided for rear-cone sound wave emission.