Ok if the mods feel like this should be in the pickups forum feel free to move it, I felt it would get more attention here. Here is the deal, I just finished the bass I have been working on that I put Dimarzio Ultra jazz 5s in. It also has a two band bartolini pre in it(ntbt?) The issue is that the bridge pickup buzzes ridicously. The neck pickup is fine. I went back and shielded both pickup cavities, and that made no difference. Something else I noticed is that when the two pickups are panned to the middle the D and G strings(second coil of the pickup) sound weak(ie out of phase) the other three strings sound fine. Noe this is my theory at this point is that the the internal wiring on the bridge pickup was wired in parallel at the factory rather than series as it was supposed to be. I did try reversing the phase on the bridge pickup and had a similar effect on the B E and A strings. So by being wirired incorectly they are not canceling hum as well as being out of phase on one coil with the neck pickup. Does this make sense or am I completely off my rocker? any ideas?