the box i designing for FU 750 or at least something at that level is 2.22-2.3 cf ad (after bracing and corner boards and all) 3x13" port @35hz which make port seem large.. i have others in the 2.35 with 2.5x13 port or 2.44cf 2.75x13" port which is 14.65 sq in per cube...
