Patent ID: 8660279
Filing Date: 2014-02-25
Classification: H04R

Abstract:
1. A loudspeaker driver comprising: a rigid speaker frame; a permanent magnet attached to the rigid speaker frame; a voice coil winding adapted to interact through electromagnetic force with the permanent magnet; a diaphragm assembly to which the voice coil winding is adapted to deliver axial motion, wherein a front side of the diaphragm assembly forms the primary direction for sound reproduction, a rear side of the diaphragm assembly is for connection to said voice coil winding, and the diaphragm assembly includes an elastic outer section whose outer rim is attached to the outer part of the speaker frame; wherein said diaphragm assembly comprises a rigid primary vibrating diaphragm attached between the elastic outer section and an elastic inner section, whose inner rim is attached to the inner part of said speaker frame; and the front side of said diaphragm assembly and said inner rim have essentially a continuous radial profile, whereby said diaphragm assembly and the coupling thereof to said inner part of the speaker frame incur no abrupt discontinuities.