2 12's in Rear Deck

lol, if i was doin this i would use free air subwoofers just because it would be so much easier. other wise i would piece together a box that fits around your trunk beneath the subwoofers. it will take alot of time prolly and will be hard to make. best of luck. a friend of mine has an old mustang and did the same thing, im not sure if he built a box below it or they are free air. ill have to ask him

heres a pic of a 95 Chevy Beretta that i did a long time ago 4 memphis sw10's and i belive it was a 1000d amp on a floating mount. i remebered it was loud as hell thou

That will take some time for making the box under the rear deck,  like Jonathan said. Why you don't cut a hole in the rear deck and make a box and fire them up or to the rear of the trunk and the bass pass thru that hole, fire them to the rear of the trunk will help the bass resonate and you'll get more bass into the cabin trought that hole.

my setup is like what Aruman is describing, but because i wanted to keep my JL 6x9's in the rear deck i took off my back seat and put a vent on it, so its like i have a sealed box inside of a vented box. the bass response will be alot better if you did the same. my plan is to go out into a junkyard, get another seat and experiment by cutting a hole down the center of the seat and roll the fabric back and put a piece of plexy with ports in that hole, then put neon and stuff in the trunk =P. your idea would look cool, i would get a security system if you dont already because people can see them and punks love eclipse.