Finally got my huge pedal board all wired up with a Voodoo labs power supply and Morgan Miller three-loop CPR bypass switcher; it's a great setup. BUT...their is of course that evil 60 cycle hum we know all to well. I have like three transformers and it's none of them...the only AC powered unit in my setup is my vintage Mutron III, the AC powered model. It's a terrific box, plugs right into the power bar, no weird bipolar power supply of anything. It is the cause of the hum. I unplug it from the AC...no hum. It's true bypass..it has a three prong plug so is grounded to the wall or something. I never had this hassle when it was just in my regular floor setup, I've had it for about a year; no 60 hz hum at all. This grounding problem is only with my new board. So.....do I lift the ground??? What d'ya all think? Risk death for a smooth quite tone? The "Pedal Power" is three prong but the DC outputs are seperated..the three-prong FX box in my setup is the Mutron. Maybe I should just trade one of you who has a vintage model with the Mutron bi-polar power supply for this AC-model. I dunno.....help!