Years Back in the 80's a friend had a stereo from "Fingerhut" that had spinning l.e.d fans that reacted to the music? Answered
The stereo had two fan like l.e.d. arrays of about 10 each in different colors red green yellow that were on fan like structures inside each of the 12" woofers on his home stereo that he got from "Fingerhut" the l.e.d.s would pulse with the music one side of a blade to the bass and the other with the highs usually ending up making a red & green with yellow pulsating orb inside each speaker that was seen through the black speaker cloth, I have never seen anything like this before or after anywhere but it was a very nice display and could be made with wheels or ceiling fans or any fan I bet, I wish I would have taken electronics in high school instead of CAD but the cad system was cutting edge in 86 and our school had access to them...the only thing I have seen like this is the floating message thingys that use a back and forth l.e.d.s waving in the air. I know if someone builds it it would sell good even for the automotive speaker markets...this was cheap chines junk it could not have cost much to build it but it did look great!!!! I have seen the automotive led wheels that can display pictures and such but this is way simpler than that and the power source and electronics were not spinning withe the leds... trust me build it and you will spend hours watching them while listening to music almost as good as what music videos used to be :) Anybody Seen or Know where they can be bought or can build them?