Okay im in the middle of my friends box for his ext cab sierra. 3.5cu ft~ and not sure on how much port to make. The box was going to be for 2 type r's but 1 blew so hes in need of some new subs.
I need to know what two subs will handle 900rms each. dual4 ohm subs. $150-200 per sub. I was looking at the cvx's, type-x, fi q, What would be best? Any other options i would like a little more sq but i want heart stopping lows. even tho they are 2 10's. 1800watts should back it up i think.
And its going to be 3.5 cu ft using pvc or precision ports. I need to know how much port area to have. I'll be using 4". I was thinking 4 4" ports = 50sq in of port. Or did i $@% up?
