Old electronics hacked into noiseboxes

Tim Kaiser FX unit

Performance artist Tim Kaiser has a terrific line in guitar effects, synthesisers and other noiseboxes that he builds into the chunky metal cases that used to house oscilloscopes and other gadgetry. Neat touches abound, like an ex-Geiger counter with a needle that swings over to the "DANGER" zone when you switch the effect on. Best of all, he'll build you one to order if you're that way inclined.