So my band finally convinced me to get a wireless. It's a Shure, "The Guitarists Diversity" Model I think it's called. I get to the soundcheck and hook it up, sounds pretty decent, no noticable loss in quality. But when I start moving aggresively, jumping, running, what have you, I start getting a crackle. The sound man even shut me off through the mains for fear of blowing something. Anyone have this problem before?