im building a box for a buddy who got two audiobahn flame q subs 12's and he also has a hifonics bx2006d...hes got 0 awg which were gunna run to the amp, now i need to know what size would be good for the box and what should i tune it two...i was gunna make a two chamber box b/c of audiobahns tedency to blow, so that if one subs was too blow then the other wont be at risk... hes gunna see @ first how the stock alt holds up, but like i told him he will more then liekly need an h/o alt...oh and hes getting a newer cadillac deville....so hes got some room in the trunk for a big box...thanks