I use a Crown Powertech 3 to power my Trace E. GPX-12 pre. I have had clipping problems once and a while.Usually toward the end of the night when everyones stage volume seems to mysteriously creep up. But even when it does,my gain is still on or around 2.Maybe 2.5,but anything louder than that and the plaster starts falling off the walls! I play pretty agressive(fingers only)but we only do party rock material,so it's not like I'm thrashing out the heavy distorted metal.I run the amp Bridged mono for a 410 and a 215 cabinet. Yea I know thats pretty huge,but I stand 6'5" and I like the highs to be a little closer to my ears. Does anyone else use a Crown with their pre-amp? Any tips would be appreciated. I am thinking of switching to an Eden WP 100. Thanks.