I'm in the process of designing an enclosure for 2 Sundown E12's in a trunk build. It will be facing the cabin sealed off and will be my first experience with aeros. Using Torres to get my tuning at 35 (recommended for the e12's) I will need to use 2 4" aeros each 12" long. This gives me a port area of 7.20 per foot. Is this too low of port area? If so any recomendations that will work better for this application would be appreciated.