I am using a Visual Sound 1 Spot power supply to power my pedal board. Every time I plug in my BOSS RC-2 to the power supply I get a hum. If I power the RC-2 with a battery the hum goes away. I have tried all types of power chaining configurations with no success.
Is there a ground issue going on with the RC-2 that can be corrected? Or do I need to step it up to a Voodoo Lab Pedal Power to resolve this problem?.