Need Help With Tuned vented box for 2 american bass xfl 1544 putting a mtx 81000d on each sub

[Chris.Gatt]

i need help with a box design for 2 american bass xfl 1544  im putting them in a 2012 mazda 3 hachback max width is 38 inches max height is 20 inches max depth is about 24 inches i want it tuned around 32 hertz and i want them to be have a divided box with each sub having its own slot vent. I am not sure if it should fire them up forward or back but i am kinda leaning towards up firing. I am putting a mtx 81000d on each sub. I think im going to use 3/4" birch. I want to double up the baffle.  thanks

[YukonXL04]

I'm not sure if your going to have enough airspace. Looks like your right around 8.5 cubes gross...