they are pretty good! i think they sound almost identical to the old XS subs.
i never ran them myself because they dont play the very low end like i listen to. if you listened to rock, especially more classic or alternative rock, they would be great.
i've only ran them in smaller sealed boxes, but i see no reason they wouldn't respond well to a ported box. the owners manual is in our manual section
my ex-girlfriend said "its car audio or me"
i've had tougher choices at a soda machine...