hey everyone,

New here, been away from car audio for awhile. Building a system for my truck which is 96 Ford f-250 4x4. Looking for overall SQ system,but would still like it to go boom. I would like to stick with kenwood for this build, heres a list of what i have;

Head unit, Kenwood Excelon KDC-X995
front speakers, Kenwood Excelon KFC-X1730P
rear speakers, Kenwood KFC-C5794PS
amp for speakers, Kenwood Excelon X450-4

subwoofer, Kenwood Excelon KFC-XW1224D, four of these
amp, X1200M KENWOOD EXCELON AMP, have one...thinking about buying another one.

So now u know what i am using, should i use two amps for the subs ? what kind of box should i build? i was thinking of building a sealed box.

I am taking out the backseat in my truck(extended cab long box) how big of a box should i build, i have plans right now for each sub to have 2 cubic feet of air space, should i give them more air space?

current subwoofer encloser specs are, 55" wide, 18" tall, 16"depth

thanks
any advice is greatly appreciated
Beach