Box Design for 2 HDC 315's in extended cab Dakota

[Fick124]

I'm trying to figure out a ported box design to sit in the large section of my backseat running 2 HDC3 15's off of a Q1-2200.2 @ 1 ohm. I would rather have the box be no bigger than the large bench seat (roughly 18L x 33W x 25 H). If need be I can take the entire back seat or go to 2 12's. Any box help/suggestions? Thanks guys.

[Joe X]

You need to give up some more space.

[Fick124]

So what is the best sized box for these? There are a few options I can do for more space such as drop the box another 5 in to the floor and another 2 inches back or (33w x 20l x 30h) or taking the entire back seat up which im trying to avoid if I can, but that would make it (45w x 18l x 30h)

[Alex Leonard]

Hdc3 are 1500 rms need more power

[Fick124]

I know their underpowered but for the time being until I save for a second amp, 2300 watts for two subs rated at 3000 rms is good for me. Im hoping about January-February I can buy a second amp. I just need to be able to build the box over christmas break otherwise I don't have the time until summer.