Yes i have searched, but i cant find the answer i need. Im getting a JL W3 12 inch, and was needing a box for behind the rear seat of my 08 CC without power slider. I was told by somebodt the W3 was to deep to work, any advice? I will also be using my factory head unit, and removing the factory sub and amp. What else do i need to run the new sub/amp? Thanks for the help, and please be patient as this is the first system i have had in 10 years, seems that everything has changed