I've done three and 2 of the 3 were good sounding - one was a JL 10w3 which sounded amazing, the other was a Diamond D3 which had some decent boom to it but made the trunk lid rattle like hell haha - the third was an RE MAX 12" which needed a gigantic 2.5 cuft box and the biggest I could get from the trunk was about 1.4 cuft with the.

Heres the diamond D3 in a Evo, I think I have pics of the RE MAX 12 in a Mercedes SLK but I gotta dig them up when I get home.