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An automotive audio speaker system includes a set of main speakers and a set of sub-speakers. The main speakers are distributed about the vehicle cabin so as to focus audio sound near the center thereof. The main speakers reproduce separate right and left audio channels, either singly or in groups,

An automotive audio speaker system includes a set of main speakers and a set of sub-speakers. The main speakers are distributed about the vehicle cabin so as to focus audio sound near the center thereof. The main speakers reproduce separate right and left audio channels, either singly or in groups, and the sub-speakers reproduce monaural sound resulting from combination of the right and left channels. The sub-speakers are arranged and operated in such a manner that the audio focus is divided and displaced to form a number of acoustic images, each coinciding with a passenger seat. Seat sensors capable of detecting the presence of a passenger in a corresponding seat may be used to control the operation of the sub-speakers, either by adjusting their relative volumes or by distributing the right and/or left audio channels thereamong.

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A speaker system for an automotive audio system comprising; a plurality of main speakers so arranged in a vehicle cabin as to produce acoustic vibrations concentrated near the center of the vehicle cabin, each of said main speakers receiving one of a right and a left audio signal channel from an aud

A speaker system for an automotive audio system comprising; a plurality of main speakers so arranged in a vehicle cabin as to produce acoustic vibrations concentrated near the center of the vehicle cabin, each of said main speakers receiving one of a right and a left audio signal channel from an audio signal source to reproduce a single channel of acoustic vibrations; one or more sub-speakers arranged in the vehicle cabin and connected to receive audio signals from said audio signal source, said sub-speakers being arranged to produce acoustic vibrations which interact with acoustic vibrations produced by said main speakers so as to form a plurality of acoustic images in the vehicle cabin, each of said acoustic images being formed in the vicinity of a passenger seat, a plurality of seat sensors for detecting the presence of passengers in corresponding seats; and means responsive to said seat sensors for controlling the distribution of said right and left audio signal channels between or among said sub-speakers in accordance with the distribution of passengers within the vehicle cabin indicated by said seat sensors.