My brother-in-law who's a real techo, is always telling me that it's not raw wattage that matters but the watts and efficiency of the speaker and its' cabinet (and I though I could get esoteric!). (He also tells me that I must be dumb using valves when solid state is so much more advanced - but I can ignore that one because .......wel because I can OK?) But he's got a point on the speakers - I'll bet there are some 1500 watt systems out there less loud than some other 250 watt set-ups. So what's out there that would make the average amp sound really loud - without upgrading the amp? We're talking speaker efficiency - cabinet porting - folded horn design, whatever.