after a couple months of ported enclosure use, i've decided that the transition from sealed to ported was pointless. The SQ in a sealed box was only slightly better, but the slight difference is enough to make me switch. My subs were as loud as i would ever want them in the sealed. Also, it takes up about 30-40% less space. the ported box was a lot louder, but i dont like the times when you can only hear bass and not the rest of the music. the only reasons to go ported IMO is if you're slightly underpowering your driver or you like a higher bass to music ratio. just my 2 cents.