Patent ID: 8325943
Filing Date: 2012-12-04
Classification: H04R

Abstract:
1. A loudspeaker comprising: a housing disposed around a central axis; a diaphragm including a flexible diaphragm portion reciprocatively movable relative to the central axis; a magnetic assembly disposed in the housing and axially spaced from the diaphragm by an interior region of the housing, the magnetic assembly having at least a first magnetic gap and a second magnetic gap annularly disposed about the central axis; an electrically conductive coil mechanically communicating with the diaphragm, the electrically conductive coil including at least a first voice coil and a second voice coil axially spaced from each other where the first voice coil is at least partially disposed in the first magnetic gap and the second voice coil is at least partially disposed in the second magnetic gap; a first amplifier in communication with the first voice coil; a second amplifier in communication with the second voice coil wherein the first amplifier and the second amplifier are separate amplifiers rather than bridged relative to each other; and a signal processor to provide an input to the first amplifier different from an input provided to the second amplifier to cause independent movement of the first voice coil relative to the second voice coil.