I have just a sub, the kicker solo Baric L7, running off a jl 500/1 under the middle row seat, the sub is down firing in a box built to fit between the mid row captain chairs. And I use the audio control lc2i to get my rca's.
For my tint I have wincos 20% all around. And winco's 40% on the windshield. It's not as black as I would like it, but it's heat blocking capabilities more than make up for it. I've tried many different types of tint and found this to keep my car the coolest. (I've tried no name brand, char-cool, silhouette, lumar ceramic, and 3m ceramic. None block heat like wincos, and the non-ceramic tint actually attracts heat like a black t-shirt Bc it gives you shade but absorbs heat) I can leave my car outside all day (95 degrees all week where I live) and jump in my car and drive off without breaking a sweat.)