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MartinLogan was founded by Gayle Martin Sanders and Ron Logan Sutherland who met in the late 1970s at a high-end audio store Sanders managed in Lawrence, Kansas.Despite different backgrounds (Sanders had trained in architecture and advertising, Sutherland in electrical engineering) they shared a passion for music and electrostatic loudspeakers.
Veritone Minimum Phase Speakers: United States Vifa: Denmark Wharfedale: United Kingdom (brand) Wilson Audio: United States Wilson Benesch: United Kingdom Yamaha: Japan Yorkville Sound: Canada ZR Speaker Lab: Slovenia Zu Audio: United States
The first fully successful full-range electrostatic speaker, and also among the most influential, was produced in 1957: the Quad Electrostatic Loudspeaker (Quad ESL, later known as the ESL-57) from Quad Electroacoustics, of Huntingdon, England. These were shaped somewhat like a home electric radiator curved slightly on the vertical axis.
A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an electroacoustic transducer [1]: 597 that converts an electrical audio signal into a corresponding sound. [2]
Abt Electronics is an independent family-owned retailer in the United States of consumer electronics, major appliances, and furniture.Abt operates 880,000 square feet at a single location in Glenview, Illinois, on 70 acres (280,000 m 2) of land ("... 1,200-employee.. 350,000-square-foot location on 37 acres...2015 [1]), and online since 1997. [2]
In 1978, Electro-Voice patented its Constant Directivity Horn, which produced an even balance of frequencies across the listening field. It overcame the uneven dispersion of high frequencies that affected the typical high frequency horns used in many professional sound speakers until the late seventies. [1] Also in the 1970s, EV acquired TAPCO.