thanks guys oh yes that's right, two 4ohm cabs is 2 ohms. hmm. no to be honest i don't think i'll need more volume. standing in front of that thing is an experience. air moving !! it's great not having to play an amp at its limit for a change. now i know what you guys mean by headroom. thanks for all your help. a question for any other 700mkii users: it's a biamp and the two speakon outs are the same, to hook up a tweeter do you need a different kind of speakon cable? the diagram on the back of the head shows that the 2nd pair of pins is for the tweeter (2+ and 2-) but i didn't see any speakon cables marked that way in the shop i went to. sorry for the noob question i'm sure it's really obvious i just don't get it.