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  2. Electro-Voice - Wikipedia

    en.wikipedia.org/wiki/Electro-Voice

    Electro-Voice RE-27N/D microphone. In 1963, EV received an Academy Award for their 642 Cardiline shotgun microphone, the first ever given for an audio product. [7] Electro-Voice launched its RE Series of microphones in the 1960s, notably the RE15, which was used extensively by musicians on television shows.

  3. Stereo-4 - Wikipedia

    en.wikipedia.org/wiki/Stereo-4

    Stereo-4, also known as EV (from Electro-Voice) or EV-4, was a matrix 4-channel quadraphonic sound system developed in 1970 by Leonard Feldman and Jon Fixler. [ 1 ] The system was heavily promoted by RadioShack stores in the United States, and some record companies released LP albums encoded in this format.

  4. List of loudspeaker manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_loudspeaker...

    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 ...

  5. Electrohome - Wikipedia

    en.wikipedia.org/wiki/Electrohome

    In the 1960s, Electrohome continued to manufacture consumer products including organs, radios, console stereos, speakers, high fidelity tube amplifiers, and televisions, as it became the first Canadian company to make colour television sets. By 1965, Electrohome products were being sold in 23 countries. Total sales in 1968 were $44.5 million.

  6. Quadraphonic sound - Wikipedia

    en.wikipedia.org/wiki/Quadraphonic_sound

    A four channel quadraphonic diagram showing the usual placement of speakers around the listener. Quadraphonic (or quadrophonic, also called quadrasonic or by the neologism quadio [1] [formed by analogy with "stereo"]) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space.

  7. Home audio - Wikipedia

    en.wikipedia.org/wiki/Home_audio

    Home audio refer to audio consumer electronics designed for home entertainment, such as integrated systems like shelf stereos, as well as individual components like loudspeakers and surround sound receivers. The evolution of home audio began with Edison's phonograph, transitioning from monaural to stereophonic sound in the 1950s and 60s when ...