Patent ID: 7457425

Claim:
A vehicle sound system, comprising: a pair of speaker drive units positioned as a left drive unit and a right drive unit in close proximity within a vehicle, said drive units each outputting forward radiation towards a flat, rigid reflecting surface of a truncated sound duct terminating in a horizontal elongate slot; and a sound processor receiving as inputs a left channel audio signal and a right channel audio signal from an audio source, said sound processor configured to mix a spectrally weighted difference signal with said left channel audio signal and said right channel audio signal, and to output a resulting modified left channel audio signal and modified right channel audio signal to said pair of drive units; wherein said truncated sound duct is straight; wherein said drive units are oriented such that they are opposite from and substantially parallel with said reflective surface; wherein the drive units are mounted on a baffle thereby isolating their forward acoustic radiation from their rearward acoustic radiation relative to the listening area.