Kinda need to know some more details there bud. How much power are you running, what kind of music do you listen to, are you capable of building your own box, etc.
definitely ported for low bass. Now it depends on if you want sq or spl, eg. very loud at higher frequencies (spl), or not as loud but a flatter response across the range (sq). That would determine your tuning frequency.
sq 30-35hz
spl 40+hz
first box i built, the one i'm using now is tuned to 25hz due to my inexperience and wanting good sq and group delay, also not knowing what frequencies most songs play I wanted to be able to play real low. For rap most play at 30-50hz, so I'm making a new box soon at 30hz to get some more dbs out of it.