I am thinking of trying 4 SA-8's but I'm not sure I have enough room for the port. My opening is 38x11 and subs and port will both be there, facing foward. This would leave me with 40-45 sq in or port area for the 2.4 cu ft enclosure after displacement/port. Power will be 2000 watts RMS. Will this be enough port area tuned to 33hz ?