Bonneville America Forums Forums Off Topic Discussion Forums Lounge Any electronic wizards amongst us?

Dunno if its any help, but ground loop interference/buzz was a common issue for me when playing keyboards. The ground would travel from the amp to the keyboard (or vice versa) via the audio cable. The solution was always to disconnect the ground on the keyboard. Of course that was using 240v but the same principle would apply with 12v. I think the ground isolating thingammy will do the trick.