One guy in my town had a kicker comp in a sealed box from walmart and it sounded ok but then he heard mine and i told him my box was ported and he says whats that mean and i wasnt going to explain it so i showed him and the next day i ran into him at walmart and he had a horrible looking hole cut in the back of the box that was already like .5 cubic ft and it sounded like ass but he didnt seem to mind haha.. he said "well it sounds louder to me now." and i just didnt say much.. wish i had a pic.. I dont know what he cut the hole with but i think i couldve done better with a steak knife, not that i would ever cut a hole in my box...