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Alright so my hdc4s are on their way here, in the meantime ive been figuring out a design for my box, Measurements so far are H=25 W=40 D=25. This is going into a ford explorer 2 door. I dont know what will sound better port facing up(with the subs) or facing the rear hatch? Ive been working on trying to get the port on the top, but i want it tuned to 28-30hz and i cant seem to get it there, atleast on Chris Torres Box Calculator. it works in the calculator on The12volt. Either way i need help with this and on a second note sub displacement, ive never counted it in my builds because ive never had such big woofers before, on their site they list * V(as)= 48.450 liters (1.711 cubic feet) Under the hdc4 18"s specs, I only assume this is the displacement, so with two woofers thats 3.422 cubic feet, this drasticaly effects my tuning I need some help with this kinda stressfull. Further info depth and width of box cant be increased at all(it will fit snug this way as it is) height on the other hand has some roomi dont know exactly but id say atleast 10".Any help with this will be greatly appreciated.
