Patent ID: 7068806
Filing Date: 2006-06-27
Classification: H04R

Abstract:
1. A speaker system comprising: a speaker driver having a diaphragm; a sealed low pressure chamber adjoining a portion of the diaphragm operable for creating unequal pressure on either side of the diaphragm to force the diaphragm in a first direction; means for forcing the diaphragm in a second direction opposite of the first, wherein the means for forcing the diaphragm in a second direction opposite of the first direction comprises a sealed high pressure chamber adjoining a portion of the diaphragm, operable for forcing the diaphragm in a second direction opposite of the first direction, and a pressure in the high pressure chamber is sufficient to provide an equivalent force against the diaphragm in the second direction to a force provided by the low pressure chamber to the diaphragm in the first direction; a portion of a housing of the speaker system forming a wall of the high pressure chamber; and a hollow voice coil former extending through the wall of the high pressure chamber, the high pressure chamber sealed at the exterior of the voice coil former between the wall of the high pressure chamber and the voice coil former with half-roll surrounds, the voice coil former having a first open end and a second enclosed end, the first end located within the high pressure chamber and the second end located at the diaphragm and attached to the diaphragm at the exterior of the voice coil former, operable for moving the diaphragm as the voice coil moves.