Should I build the encloser with the subs up and port back? Maybe, subs in rear and port in rear too? I don't know!!! I am infact a spl nut!! and I am shooting for the 140db and up!!! So, does anyone have any suggestions on a box layout!! Thanks! Not sure but will probably go with the Kove audio Armeggedin 15" u2 subs and 2-Lanzar Optidrives2000d's I already have the amps thats why!!!!!LOL