That looks great. My question is, is there a sound difference with the port being on the bottom like that verses a vertical port in the middle? Just curious, never had one or seen one in person for that matter..
Also, I finally got ahold of someone over at Five Star and Bob said for the Extreme 15's, they take 3-1/2 cf per sub so 7 cubes at 36 hz. Thats all he gave me