You mean phase? I run sweeps adjusting phase on sub, then compare each response seeing what's the best response. Once you get that as a starting point then apply PEQ corrections. Ideally you want seperate left, right, and subwoofer PEQ filters. If the wiim only does combines Left, Right and subwoofer that's more tricky, probably wouldn't want to apply corrections on one where it could also effect the other, ie if you set 80hz high pass, I'd try and not correct around the 80hz area as it'll effect both speakers and sub.