ok i need to know what to telll the people on the subwoofer displacement and the recommended intrernial volume i want the box ported so what should it be tuned to also can somone help?
well you haven't gave us any info on the subs, but assumming they r 12's i would have to guess at .089 per sub. displacement is gonna be totally up to you. But I would recommend going at least the manufacturers suggested size. bigger if the vehicle allows. Bigger is better. But if these people building your box are reputable, they should already know all this. If they don't find another builder.