Design studies aimed at producing a constant speed turntable with rumble and wow reduced to the vanishing point led SONY engineers to develop a serv-controlled turntable featuring a slow-speed d-c motor. The result is a superior hi-fi turntable whose rotational speed is entirely independent of line frequency, tracking pressure and other outside influence.

Author: Mabuchi, Osamu
Affiliation: Sony Corporation of America, Long Island City, NY
AES Convention: 33 (October 1967) Paper Number: 530
Publication Date: October 1, 1967

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