Home › Forums › DIY Speakers and Subwoofers › I need an order of operations. › Reply To: RE: I need an order of operations. opulentone Member December 7, 2021 at 4:10 am @ajc9988 ok thanks! I measured from center of the surround to center, so at least I got that right. Should I be looking up any other physical measurements or is the Xmax the only one I will need?