I currently have a rel q400 sub in a normal size room i.e 18*12 ft. This is fine but we are building an extension which is 25*15. Would this sub struggle to produce the same kind of bass in this new room? I know that two subs are supposed to be better than one but cost is a factor. Does anyone have any thought/suggestions.? I have also been recommended to change the sub to an M&K. again any thoughts?