The Fostex Company was founded in July 1973 by Foster Electric Co.,Ltd. (founded 1949), one of the world's largest developers of OEM speaker and transducer products, employing over 50,000 people in nine countries/territories. Foster Electric Co.,Ltd. is listed on the Tokyo Stock Exchange.
Fostex speaker components initially won acclaim because they were an early developer of RP (Regular Phase) technology which provides for a very clear sound with high sensitivity and wide dynamic range. Today RP technology is well known worldwide not just for speakers but also microphones and headphones, with the Fostex T20RP being one of the most popular studio monitoring headphones in the United States.