I have my 2 12 typr r's in a 5 cuft. box tuned to 32hz. The 05 type r's have the "double rolled" surround. I got my box plans from another site, can't remember exact dimensions off the top of my head.
I got mine off of Fleabay for 220.00 shipped new w/ a full warranty. I am only running it @ 2ohms right now and it hits pretty **** hard. They are some nice looking amps for sure.
i got a olds my trunk is kinda big space is not an issue if i have to ill take up the whole trunk if i have to my cousin has a brutus 1600 but he wont part with it