Patent ID: 7103193
Filing Date: 2006-09-05
Classification: H04R

Abstract:
1. A loudspeaker system comprising: at least one electroacoustical transducer for converting an input electrical signal into corresponding acoustic output; an enclosure divided into at least first, second and third subchambers by at least first and second dividing walls; said first dividing wall supporting and coacting with said at least one electroacoustical transducer to bound said first and said second subchambers, at least one passive acoustic radiator specifically designed to realize a predetermined acoustic mass and intercoupling said second and third subchambers; at least a second passive acoustic radiator specifically designed to realize a predetermined acoustic mass and intercoupling at least one of said second and third subchambers with the region outside said enclosure; at least a third passive acoustic radiator specifically designed to realize a predetermined acoustic mass and intercoupling said first and second subchambers; each of said subchambers having the characterization of acoustic compliance; said first and second passive acoustic radiator masses interacting with second and third subchamber compliances to form two Helmholtz-reflex tunings at two spaced frequencies in the passband of said loudspeaker; said at least a third passive acoustic radiator intercoupling said first and second subchambers to form a third Helmholtz-reflex tuning at a frequency lower than that of said first and second passive acoustic radiators.