homebuilt rotating speaker cabinet demonstration

I made two copies of this design so that there can be one on each side of stage...it has a single JBL 12" speaker inside it, frame is of plywood. The speaker in this video is driven by a crate 75W amp. The back of the cabinet has a 12" hole in it too, so sound comes out both ends. To record with this cabinet, I found the best way is with a microphone directly abover the rotting cabinet, so that the speaker's entire swirl gets picked up, if the microphone is in front of the speaker, you only get half of the swirl, and it doesnt sound as good. In the middle of the video you can tell the differenc in sound from the speaker being rotating or not. (big diffeerence) Carbon vacuum cleaner spring-loaded brushes bring in current to the speaker at the top and the bottom of the cabinet through bronce slip rings. THere is a heavy flyweel that I kick to make it go - similar to a potter's kickwheel. This can easily be motor-driven, with small electric motor and rubber wheel resting on top of flywheel to spin it - sewing machine motors with food pedal speed control work well for this or just small DC motor with different voltage input for different speeds... I made another design of speaker cabinet that can spin both vertical or horizontal a photo of it is at this link: www.geocities.com

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