ok so an update..
built a few boxes now and still the loudest ive gotten was a 146 at 41 hz with a box that 4 cubes at 38hz and 78 square inchs of port
im going to try 4.8 cubes at 39 hz with 106 square inches of port and hope for that 150 mark!!
few pics of boxes and such
i went witht he pink tap to match the subs!!
no vids yet tho!