I often wonder what is really "needed?" Last week, I was on a cruise and there was a 4 piece group in one of the lounges (pretty small.) One evening, they moved them outside for a party. The bassist used the same thing as in the lounge-a Peavey TNT combo. I couldn't get as close as I wanted, but I don't think it was mic'd or DI'd. From what I could tell the only thing mic'd were the vocals and the kick drum (a 58 about 8 inches from the front head.) The PA consisted of an Allen&Heath mixer with no outboard EQ's or Effects. I am pretty sure the unmarked 15''/horn FOH cabinets were powered by a QSC RMX 850. Armed only with the equipment listed they played for a 200-300 people outdoors. It wasn't studio quality sound, but you could hear everything. It was pretty well balanced. I am still trying to figure out how they pulled that off.