I had a 3.0^3 enclosure with square port tuned to 38hz (5x5x11 inches) until my setup was stolen. Honestly that box didnt do it for me. Insurance replacing all my equipment and want a bigger and badder box to throw my type r's in.
How about a 4.0^3 box with a vent (slot port?) for each sub tuned to 38hz? I bet it would pound harder. Any opinions?