PLEASE HELP - New Sub Otions
 

I am trying to get some help from you guys. I am currently running two 15" 9515 Digital Design subs, powered by four US AMPS 2000x amps. I enjoy the two 15's but I currently have more then enough power. I am currently using a box from my old truck setup.

I need some help with trying to decide do I just make a new box to fit my application (Cadillac Escalade) or do I get something more?

Was looking at four 18" RE Audio XXX or if you guys can recommend something else? Would one US AMPS 2000x per sub be enough power?

I am also running a Quad Iraggi alternator 300 amp each with four 1/0 gauge cables running to two Kinetics 3800 in the back. With my current set up, I am still able to see out the back window, but willing to sacrifice that.

that's not really "more than enough power". If anything that's just the right amount of power for the two 9515's.

what you need is a better box.

I built the box using the digital designs specs on their web site.
I will post the exact box volume and port specs. But if I'm not mistaken each sub has four cubic feet and the recommended port tuned to 40 hz.

Would you suggest then two 18 inch subs or just to make a better box for the two 9515?

I am using a box with two separate chambers. Each chamber is 4.06 cubic feet not including a 1309 cubic inch port. My port area is 77 inches. Each sub has its own port in its own chamber. The chamber for the sub is total volume. Is 4.06 cubic feet with sub displacement enough space?
Should I make the new box larger?
Any recommendation for a new box for the two 9515?

ALSO currently the bubs and port are facing the rear of the escalade. Would you recommend facing the subs up?

All suggestions are greatly appreciated, as I would like to start on the construction of the new box very soon.

id try subs up port back with about 2x that port area

^^^ what he said.... :smilie_da

So your suggesting about 150 square inches pf port area per sub?

What about the volume? - is 4 cu ft per sub enough or should it also be increased?