skar audio zvx

I have an 04 Corolla with an rp2000 on 1 zvx12v2 sub. I bought a pretty big dual 12 box tuned to 32hz. The port wraps around the back and is as long as it can before it chokes itself, i had 2 sdrs in it at 1400w but on the lows I could tell they weren't doing what they could have. I bought a zvx...

First would like to say I’m new here and getting back into audio. Used to be in caco and I’ve noticed a lot of the forums died. Hope this one hasn’t.  What parameters do I choose for a custom built subwoofer? I am having a Skar Audio ZVX 15 recone being built that will put it in line with...