98 GrandPrix Build
if this is out of your trunk i really dont see how your going to fit an 18 and 2 12s in there and still have enough port area thats one of the reasons why id go with a single 18 you still have to have room for the batterys and amps etc as well
same as what ? , as loud as a single 18 ? , you just have to test and find out every cars differnt , depends on your budget and on how much money you want to spend , the 18 can probabaly handle more power then the 12s , alot of it comes down to box enclosure


