Patent ID: 9025809
Filing Date: 2015-05-05
Classification: H04R

Abstract:
1. A low profile loudspeaker comprising: a rigid frame; a magnetic yoke affixed to the rigid frame and comprising a sidewall and a central slug disposed within the sidewall to thereby form an air-gap therebetween, at least one of the sidewall and the central slug comprising a permanent magnet; a voicecoil, at least partially disposed within the air-gap, comprising a generally cylindrical former, with top and bottom edges and inner and outer surfaces, and a first winding capable of receiving an alternating electrical potential and disposed on one of the inner and outer surfaces and spaced inwardly of the bottom edge, the former defining plural apertures therethrough positioned between the first winding and the bottom edge of the former, the voicecoil moving within the air-gap in response to an alternating electrical potential being received by the first winding; a spider having a flexible outer portion affixed to the rigid frame and a rigid inner portion comprising a circular channel with a U-shaped cross-section, the channel receiving and being adhered to the bottom edge of the voicecoil former with an adherent such that the former apertures are enclosed by the U-shaped channel and such that the adherent contacts the inner and outer former surfaces and the former apertures, the outer portion of the spider flexing in response to movement of the voicecoil; a resilient surround affixed to the rigid frame; and a rigid cone comprising an inner portion affixed to the top edge of the voicecoil former and an outer portion affixed to the resilient surround for movement in response to movement of the voicecoil.