I was at a gig a couple of weeks ago and an odd thing happened which I can't explain. I have a Boss OD-3 with the drive turned off that I use for a clean boost. Been using it like that for a couple of years. At this gig I hit the OD-3 for a lead and my amp made an awful noise...kind of a breaking up rumble...hard to describe. I use a HotRod Deluxe amp. Between sets I started troubleshooting. I use a Line 6 G30 wireless system. I tried bypassing the wireless and the problem went away. I've been using it for about 3 years with no problem and I figured it had failed on me. Then I remembered that there's a setting on the transmitter that's suppose to duplicate different length cables. I always had that switched to off but forgot that I had switched it to the 10 foot cable setting the day before just to see what happened. I put the switch back to the off position and the problem went away and it's been fine ever since. I'm not that technical with this kind of thing so I wondered if anyone had any ideas why this happened.