Why would you run your RCA's from behind the radio though??
Didn't you see my pics of the wiring? You can do everything in the trunk (except the remote wire--which is in the passenger kickpanel)
Also....my JL 10W1v2 subs only need .625 sealed for each sub.....of course the box I had (I just got a new one) is gonna be a little bit bigger which won't hurt.
If you wanted to hop up their newer, bigger sub the 10W3v3....it still only needs .625 and that's a sweeeeeeet sub!
I had 2 Infinity Perfects before & they were probably the worst subs I've ever had....well actually MTX was worse, but they didn't have any bass to them......but it's your car
I posted this in another thread.....I don't know if you're already good with fiberglass, but here's a good how to for a box for the corner of your trunk:
http://web.njit.edu/~cas1383/proj/Glassing2/index.htm