Louis Dorren

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Louis Dorren is an American engineer.

In 1969 Louis "Lou" Dorren invented the Quadraplex system[1] of single station, discrete, compatible four-channel FM broadcasting. He founded Quadracast Systems, Inc. (QSI) of Palo Alto, California, United States to license his patents to RCA and others.

Dorren was awarded more than a dozen patents in the radio communications field, many of which are still in use today.


  1. ^ Electronic design (Hayden Pub. Co.) 19 (10-18). 1971. A possible solution to broadcasting is in an experimental Quadraplex system for FM transmission and reception of all types of discrete four-channel sound. Invented by Lou Dorren, vice president and director of research at....  Missing or empty |title= (help);