well here's my latest box build, a dd1510 in 1.57cubes net tuned to 37hz with a 4" homemade aero (pvc pipe).....
here's the design...unfortunetly i didnt pay much attention to the mounting depth of the sub, and i later found out that the magnet would be hitting the port, so i hade mount the sub on the other side
Attachment 26515773 Attachment 26515774
routering the holes for port
port ready to be glued and clamped
assembling the box
closeup of the port
port put in place