Apologies, I know there are a ton of threads on this, but may contain conflicting and partial information. I use a single multi-FX pedal (Zoom 506) into a powered PA cab (Carvin LSx1503A), both are plugged into a standard power strip. I get hum when I use the pedal with the AC adapter (One Spot), but not with the battery. So here is the question as specific as I can make them. Is there some way I can eliminate the hum while still using the AC adapter, such as the Ebtech Hum X or removing the shield from the AC adapter (please give specific instructions or links to same if it requires wiring/soldering)? @ The Moderator: Could you please place a sticky re: Ground Loops and Hum versus Single Coil Pickup Hum versus whatever. This would save a lot of time and help the autodidacts like myself.