My Cadillac eldorado trunk is sealed off from the cabin. The back seats do not fold down and the trunk lid is motorized. I've already cut a roughly 3x3 inch square hole in the deck. Helped a lot. But the output from my last system still lacked. I need some opinions on anyway I can fix this problem. Take the 6x9s out of the deck perhaps? Anything else? I plan on making the hole that I already made a lil bigger.