Hey guys, I'm a lurker around here, usually browsing around the classifieds, but I'm hoping someone can help diagnose a problem I'm having with a bass I recently picked up. It would save me a long drive to visit a repair shop! So, searching the forums I've noticed several reports of a bad buzz/hum coming from their Fender Deluxe Jazzes, but nothing quite the same as mine. Anyway, I recently acquired a 2010 MIM Fender Jazz Deluxe bass at a killer price with a slight catch - the old Noiseless bridge pickup had died on the last owner and was replaced with a Duncan. The bass came with a bit of a buzz issue, which seems to be greatly influenced by the position of the eq/pan knobs. The problem only is audible at volumes above ~50-75%, and touching strings/pole pieces/bridge does not help. The noise persists on several amps, as well as DI'd in to a PA system. Here's a quick qualitative summary of how the noise is affected: *All eq knobs flat, volume maxed, bridge/neck pickups 50/50, there is a significant buzz. The rest of this list will assume all knobs in this state except for the listed change: *Roll treble down: Noise moderately reduced *Roll treble up: Noise gets worse *Roll bass up/down: No audible effect *Roll mids up: Noise GREATLY reduced *Roll mids down: Noise moderately worsens *Pan to bridge (non-Noiseless) pickup: Noise gets awful *Pan to stock neck pickup: Noise reduced, but not as much as boosting mids If I boost my mids, cut treble, and pan 100% to neck pickup, the noise is inaudible. Anybody hear of an issue like this? Is this likely a grounding or shielding problem, or something in the preamp or wiring or what? Any help you guys can provide would be greatly appreciated!