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Polk Audio was founded by Matthew Polk, George Klopfer and Sandy Gross in 1972. The three first met one another while attending classes at Johns Hopkins University in Baltimore . After graduating in 1971, the team collaborated on producing a sound system for a local bluegrass music convention.
An early hardware attempt to compensate for loudspeaker-ear crosstalk was to apply a little out-of-phase left channel to a separate driver in the right speaker cabinet, and vice versa. This was marketed in 1982 by Polk Audio as "true stereo" in their SDA-SRS, SDA1 and SDA2 series speakers [5] [6] by licensing the Carver Sonic Holography patent. [7]
Oswalds Mill Audio: United States Panasonic: Japan Peavey Electronics: United States Philips: Netherlands Pioneer: Japan PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy ...
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This list of car audio manufacturers and brands comprises brand labels and manufacturers of both original equipment manufacturer (OEM) and after-market products generally related to in-car entertainment that already have articles within Wikipedia. While components sold by these companies have much in common with other audio applications or may ...
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