1
Herbert I Gefvert: Multi-dimensional sound reproduction system. Fitch Even Tabin & Flannery, July 2, 1996: US05533129 (40 worldwide citation)

A unified loudspeaker system and method for use with a home theater stereo surround sound receiver. A plurality of binaural (dual) loudspeakers are housed in a single loudspeaker enclosure having a multiply-segmented face portion. Left and right loudspeakers are canted away from a center loudspeaker ...


2
Herbert I Gefvert: Sound reproduction system. Neuman Williams Anderson & Olson, December 19, 1989: US04888804 (22 worldwide citation)

A sound reproduction system for providing an enhanced stereophonic image within an enlarged listening area includes both a left and a right transducer enclosure, each enclosure having a main transducer array for receiving an audio channel signal and providing direct reproduction thereof, the main tr ...


3
Herbert I Gefvert: Multi-purpose interchangeable modular auto loudspeaker system. Neuman Williams Anderson & Olson, February 26, 1985: US04502149 (13 worldwide citation)

A modular high-fidelity loudspeaker system is provided for automotive applications, which system is capable of functioning both as a conventional co-axial loudspeaker unit and as separable lower-frequency and higher-frequency modules. When modules are used separately and are mounted in appropriate p ...


4
Herbert I Gefvert: Multi-dimensional sound reproduction system. Fitch Even Tabin & Flannery, December 15, 1998: US05850457 (10 worldwide citation)

A unified loudspeaker system and method for use with a home theater stereo surround sound receiver. A plurality of binaural (dual) loudspeakers are housed in a single loudspeaker enclosure having a multiply-segmented face portion. Left and right loudspeakers are canted away from a center loudspeaker ...



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