no clue what the box is tuned to its just a prefab he got from the shop.
Yes all stock for now I told him were goin to do the big three and an extra bat when he gets his other amp.
I dont know what series they are, but i think there the m series
this other person we know has 4 of the same powerbass subs on like a 2100 watt amp and his isnt as loud as this explorer. And the other guys is an a jeep grand cherokee.