Well I was at practice on Sunday and we played through all of our songs so it took a good 5 hrs. I was using my 1x15 cab at 4ohm with my GK BL600 cranked up pretty good. About 3-3.5 hrs into practice I heard a electrical noise come from somewhere (I was leaning against the wall and not near the speakers of the PA or the bass amp). I moved up and found it was the bass rig......like a violent noise....as if someone touched the tip and the sheilded area of the guitar cord. So I quickly disconnected the Behringer BDI21 pedal I had in line and plugged in straight.....problem gone! So I figured it was the pedal. So now I get my stuff home and tried the pedal out for about an hr and no problem. I plugged straight into the amp and now I have a bad static pop when I walk across the floor (like louder than the notes I am playing) and a terrible hum when I get near the amp. I used to have a slight hum but nothing like this......I can take the guitar and get it right up within an inch of the amp and the noise is so loud you can almost feel it in the floor. So what the hell happened? I am hoping I don't need to return it to GC but I bet I will have to. I hope it doesn't have to be sent out and I am ampless for all these shows in April we have booked. Let me know what you all think.....and if you have any suggestions to try out. BTW - the only variable that really changed when I got home is I am plugged into a different cabinet (a work in progress). I don't think that would have anything to do with it but if it does speak up.