I built the box the other day and routered the inner port walls and 45ed all the corners and also put a double face and routered the port mouth, didnt take build pics sorry. I am supposed to have my sub friday and I will be throwin it on my kicker zx1500. I hope this DC lvl4 xl really impresses me, and I purchased a lvl2 witha pink custom dustcap for the wife, I will post so after pics later, I know pink subs have to be louder though