It's getting a little frustrating. I can't figure out where it is coming from. Here's what I'm running: Mike Lull Vintage 4 ~> Demeter VTBP-201 ~> QSC PLX 1602 (stereo) ~> (2) Berg HT112's I've tried different basses, cables, amps, pres, speakers, power outlets... I can't isolate the problem anywhere . But it's pretty nasty sounding, almost as bad as a distortion pedal with just a bit oif overdrive. Everybody comments on it. And with a rig like this, I should be getting a good sound. Any help?? I've got a couple big gigs coming up this next weekend!