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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.
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] In 1991, Roland Corporation launched Roland Sound Space, [8] a system that created a 3D sound-space using stereo speakers. It worked better for some listeners than others.
Audio channels: A 2.1-channel soundbar has two main speakers and one subwoofer. A 7.1.2-channel system has seven main speakers, one subwoofer and two rear speakers.
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 ...
SpeakerCraft was founded in 1976 by Edward Haase, Ken Humphreys and Eugene Humphreys. [2] Beginning as a retail stereo store and original equipment manufacturer of loudspeakers for companies such as Sonance, Niles Audio, Bang and Olufsen, JBL, Polk Audio, and many others, the company evolved into a designer and installer of custom audio systems.
In electronics, motorboating is a type of low frequency parasitic oscillation (unwanted cyclic variation of the output voltage) that sometimes occurs in audio and radio equipment and often manifests itself as a sound similar to an idling motorboat engine, a "put-put-put", in audio output from speakers or earphones.
The dancefloor's sound system was based on Richard Long's design at Paradise Garage. The club spent about £500,000 on a sound system that used Martin Audio components in custom-built cabinets, including twelve 21" 9,500 watt active subwoofers, twelve 18-inch subwoofers and twelve Martin Audio W8C mid-high speakers. [34]
The term loudspeaker may refer to individual transducers (also known as drivers) or to complete speaker systems consisting of an enclosure and one or more drivers.. To adequately and accurately reproduce a wide range of frequencies with even coverage, most loudspeaker systems employ more than one driver, particularly for higher sound pressure level (SPL) or maximum accuracy.