I have a 1991 Chevy Caprice Classic. I already have the amp, and a 3.1cu dual 15" box. And I'm probably going to have to do an extra battery in the back, and I'm probably going to sell the box. I just like the cleanliness of a single-sub setup, but I love the bass of his 12's. I am just skeptical of the single sub ordeal, partly because I have never heard one. So, a Nightshade or an Xcon would do work? I have the trunk space.. lol. Thanks! P.S.- Thanks for the warm welcome!