The bass player in my band uses the Ampeg SVT-4 Pro head...supposedly something like 1600 watts...right... But frankly the amp is quiet as hell. I mean it has no power. A mutual friend of ours uses an Ernie Ball 500 watt unit, and through the same Mesa 1-15" 4-10" cab, the Ampeg gets smoked. If anyone has suggestions for getting more power out of his amp, I'm all ears. We've tried topping off the graphic EQ gain and using the knobs, but nothing seems to work. Thanks-> WF PS It's not that the guitar players are too loud...one of them is acoustic!