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Message: <blockquote data-quote="pacho" data-source="post: 835765" data-attributes="member: 558671"><p>One of my friends has a F-150 and he will be making the cutout from his bed to the cabin for his sound system.  His daily driver will be 4 15"'s and when he goes into competition, he says he'll upgrade to 8 15"s.  The box for the 4 15"s will be firing up in a vented box (vents also firing up), each sub will get 100 in^2 port area and my question is can we just use one port with 400 in^2 port area or do we have to separate the subs in separate chambers and make each port separate for each sub??  Also-when you're looking at the rear of the F-150, what would be the better route to go, firing the port up at the rear of the F-150 or firing the port up closer to the cabin?? Thanks for all responses.</p></blockquote><p></p>

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