About six months ago I took an EMG Het Set in trade for another set of pickups. I installed them on a guitar immediately and thought all was well. I used the guitar at rehearsal at significant volume for the first time this past week. At high gain, the bridge pickup is squealing like crazy, and also appears to be microphonic. When I turn the volume knob down to 6 or lower, the squeal goes away (along with the desired tone). My two other EMG equipped guitars (81 in both) do not suffer with this issue. I really like the sound of this pickup and I am hoping there is a way to repair it. I emailed EMG customer service on Thursday. Nobody has got back to me yet, but it's only been a couple days so I am hoping I am contacted next week. Anyone know if this could be an issue other than a faulty pickup? Does anyone know who might be able to repair a microphonic active pickup?