Hey guys im gona make a box for 2 SX 10" subwoofers and my DIMS are ,

depth - 15"
Width 34"
hieght 13-15"

now i want around 3. cubes truned to about 36 hertz so what size of a base should i make out of MDF? i wana make a bottom back and sides then make and mount wrings and then fleece abnd fiberglass it sothe subs ported baack what size aeroports and how long should i use and what way should they point thanks