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first subwoofer was developed during the 1960s by Ken Kreisel
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ken kreisel bettered and improved his sub desighn
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The first use of a subwoofer in a recording session was in 1973 mixing the steely dan album
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Subwoofers received a lot of publicity in 1974 in the movie Earthquake which was released in Sensurround
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17 U.S movie theaters had sensourround
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by 1976 almost 300 movie theaters had sensourround
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sensourround and subs was used in the movie rollercoster in 1977
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by 1980 subwoofers grew alot in popularity and more people were wanting them