Hi, I need some help identifying the source of the noise my bass produces and how to get it fixed (or hopefully, fix it myself). Although I've been playing bass for years, I don't know much about the electronics, particularly active electronics. I've got a "prototype" Washburn T35 (made for NAMM or something equivalent) that has a Seymour Duncan SMB5 (MusicMan) pickup, which features a 3-band active EQ with boost/cut for low, mid, high, and the low EQ has a pull-pot for "slap contour". The construction quaility of the bass overall was not too impressive, so perhaps something was not wired properly? (the solder joints look OK). The problem is that the treble pot has a constant high hum to it; if I cut the treble all the way it's barely noticeable (but still there). When I boost it it's extremely loud. I've looked at the wiring, and there are a couple of unused wires that are taped at the ends. I took my bass to have it setup by a guitar tech and asked him to fix the problem (thinking he could just replace the treble pot). He suggested the problem may be with the preamp, but he wasn't sure, and couldn't find a wiring diagram for it. So, how can I go about identifying what the problem is (pup, preamp, pot)? Once identified, how could I fix it (I am fairly handy and can solder). Thanks for any suggestions.