well a bassist from a different band under the same management has offered to sell me his rig for a rather appealing price (well the manager the amp which he'll give to me just garnish my band earnings to pay for the amp) and im just having a hard time understanding something...its a peavey mark III and a JBL 4x10....i already have a Peavey Mark III and a Peavey 410TX (oooo..what a stack it'll make)...but whats confusing me is that he says the mark 3 is 400w?....mines only 150w @ 4 ohm?...am i missing something? did peavey change specs from year to year or something?