Recently got another 12" Eclipse titanium SW9122 but instead of a small sealed enclosure, I'm wanting to go with a ported box but dont know how exactly how big of a box to build nor the port tuning...Its going in a Jeep Grand Cherokee Laredo so I have quite a bit of room in the back. Ended up going with a Skar RP1200.1D amp to run the single 12in eclipse titanium but could use some help & advice. I attached the specs of the "12 Eclipse Titanium SW9122DVC sub & also what type of box I'd like to make but wood is also alot too and will probably need (2) sheets of MDF $40ea along with all the other stuff I need so should I even build one or find a decent prebuilt?