you're not seeing something.
what I'm doing is cutting a hole in ym rear deck, and firing the sub up through it, IE a large hole, (at least 15" wide, 12" deep" what I'm trying to do is put the sub in the cabin, and isolate the cabin from the trunk.

 

would the trunk not be like a box with a 15"x12" port

ok i looked at your cardomian

it will work

i had a bmw with a 1/4 firewall

 

that's exactly what it'll be doing Dereck.
FINALLY someone who understands.