DIY Rotary Speaker

Short demo of a homemade rotary speaker - first without rotation, then fast, finally slow (rather poorly played guitar) Made with a DC motor from a tape deck, a coffee dripper with a paper cone and a fostex speaker. The speed is being adjusted by a PC fan control which is being fed 9V. However, this only goes down to about 5-6V, so for slow speeds I’m switching the input to the wall wart. Hopefully, I can build a more elegant solution for this into the finished enclosure, including an option for