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Polk Audio, Inc. is an American manufacturer of audio products best known for its home and automobile speakers. The company also produces a wide range of other audio products, such as amplifiers and FM tuners. The company's headquarters is in San Diego, California. In 2006, it was bought by Directed Electronics. [1]
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
The Central Polk Parkway, also known as State Road 570B (SR 570B), is a proposed controlled-access toll road in Polk County, Florida. The proposed road is actually two separate roads—called legs by the Florida Department of Transportation (FDOT). The western segment will connect the Polk Parkway with SR 60 between Bartow and Lake Wales. [1]