I have some issues in my home studio set-up, probably due to some not grounded power supplies (although I'm not sure). So all basses I have (even humbuckers) with non-emg pickups pick-up hum/static/radio interference. I don't know how to describe it. I tried shielding the pickup cavities of some basses, but that also didn't resolve the issue. What did resolve the issue was.. switching to EMG pickups, either the active or passive. My issue now is that I have a new Jazz bass that I love, with Dimarzio pickups. They sound great. But again... the hum thing! I can't record with this bass, and definitely not a clean sound. So my question is: Do I change the pickups to EMG JV52's or.... Is there some magical way to solve this issue once and for all? Possible causes I can think of: - bad power - an amateur radio broadcaster across the street - mojo is telling me to get EMG's - non grounded pickups?