Hello to my car audio friends this it my first time posting.. i have a burning question. I want to put 2 15" in my ride and i want to give it the most space as possible. The problem is i have read subs up port back is the best application but i could only get the most out of it with subs up port up... how much would i be missing out on both the meter and ear by doing subs up port up?.. is it a big no no in the car audio world to use such application? thanks for the help in advance..