So I've searched for an answer to this more specific question but couldn't find all that much. I know mixing a 1x15 and a 4x10 or 4x8 is bad in most situations and that matching speaker sizes will produce in a better result. Is part of that a wattage issue? Say if you have a 300w 1x15 and a 400w 4x8 or 500w 4x10 and you have a 200w head that has multiple 4ohm and 8ohm outs, would that still cause phase cancellation and it not generally sounding as good as matched speaker sizes? Part of the reason I'm asking is cause I was offered a 300w 1x15 from a friend for cheap and was looking at a 4x8 or 4x10 as well, but am also generally interested.