Hope somebody can help me with this one. My 4003 is an '06 and I've not played it that much. It has always seemed to have a bit more hum than my other single coil basses. Today I took it over to practice, the hum/buz coming from the bass was insanely loud. Even with both volumes down all the way, the bass was still buzzing. My assumption was a ground wire. Got it home and just checked it out. everything seems to be wired fine. Tested with my amp and the usual hum was there. But turned both volumes off, and there is a constant buzz. The loudness of the buzz changes when the bass is turned in certain directions. I've certainly seen that when the volumes are full up... but completely off? Let me mention this occurred today at 2 different houses, different amps, and even different cords. Any ideas on what it could be and how to eliminate? Thanks.