Servodrive Contrabass mechanism in action - YouTube
DIY Infra-subwoofer with 30” driver! - YouTube
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The Sound LIVE - Tom Danley Spotlight - Intersonics & ServoDrive In 1979, a co-worker recommended a job offering nearby at Intersonics, a contractor to NASA, supplying hardware for rocketry research. Danley
SOLD - ServoDrive ContraBass 14HZ @115db! Subwoofer Carpet/Black | TalkBass.com