Stax owner and president Naotake Hayashi was later supported by his son Takeshi Hayashi.
In 1969 Stax released a condensor-based phono catridge, which was in 1980 the basis for a patended video pick-up (United States Patent 4205856).
In 1988 an apparatus for shielding an audio signal circuit was patented (United States Patent 4741041).
Stax developed Semi-panoramic earspeakers:
After four years of development the huge Stax SR-Sigma series was released in 1977, followed by
the SR-Lambda series in 1979.
During the 1980s Stax developed the Professional Series, originally developed for Daimler Benz, the german car manufacturer.
By the end of 1995 Stax Industries, Ltd. along with its American subsidiary, Stax Kogyo, ceased business operations due to a disagreement between owners of the firm and its employees. However, around 1996 some engineers from the old
company formed a new company, Stax Limited in Saitama, Japan (see there)
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