i think i remember something like that too, But i think it had something to do with box size, I can fit any box pretty much (i have a crown victoria) But i dunno, Can you give me a link to that? for some reason i cant search this board. Seems like it would work, I mean the brahma motor should be strong enough for an 18" cone, thing is massive. But i dont have a very clear understanding of t/s parameters and how speakers work. btw, im probably going to get incriminator audio to do it, They have the aluminum coils