Nice setup! I am wanting to hookup an amp and sub also as I have no spare tire in my trunk. Do both the sub and amp fit in the tire space? If you could take pics of your sub setup that would be awesome!
The sub fits nicely in the spare tire wheel well. This is what I have: TS-SWX251 - 10" Preloaded Shallow-Mount Component Subwoofer Enclosure | Pioneer Electronics USA
. I can snap a pic soon. It sits parallel with the axle line. Now, there is a bracket that holds the spare tire/inflator kit in place. But, if you wanted the 12" instead, you could grind the bracket off and turn the sub perpendicular to the axle line and it would probably fit.
I mounted the amps along the ledge that angles up toward the back seat.