I have been through a gaggle of cabs with my WA. 3 12s will do it for me-loud enough for a medium bar without PA and only minimal peach fuzz on the tone. A 410 will also be fine, but 2 12s just does not get me the clean headroom I like. We are on the loud side. IMO the WA is an honest 300 watts but if you want it completely clean you're probably getting less.