A vehicle sound system encompasses a combination of speaker configuration,
speaker placement, and sound processing to improve sound quality. A pair
of speakers (or rows of speakers) are placed close together and located
in the front of the console or dashboard with their geometric center on
or near the vehicle's central axis. A sound processor acts to "spread"
the sound image produced by the two closely spaced speakers by employing
a cross-cancellation technique in which the cancellation signal is
derived from the difference between the left and right channels. The
resulting difference signal is scaled, delayed (if necessary), and
spectrally modified before being added in opposite polarities to the left
and right channels. The pair of speakers may be placed on a common baffle
or mounting surface or in a common housing enclosure, with sound being
carried through one or more ducts and emanating out of a slot.