This is a multi-part message in MIME format. I bought A Sabine Feedback Exterminator (FBX-901) a few years ago which = ended up in my attic..who knows where the directions are! Anybody had = any luck with one of these (and can help me use it)? I have an old Bogen = PA which I have been able to tweak up to 4-5 before feedback. Thanks, Gordon