ported or sealed?

You also need to consider what type of sound you want from this sub.  A ported box will play louder than a sealed box, with less power.  A sealed box will be more accurate but require more power.  The type of music you listen to is a big factor in choosing box design.  Even if this sub is optimized in a sealed enclosure, you may want to choose a ported or even bandpass enclosure if you only listen to rap.

Jeff

I would only recomend bandpass for the experienced installer.  And even then it's a very tricky project to do.  Bandpass also play extremely loud at certain frequencies.  Other notes higher or lower then the tuned one will sound quieter and not nearly as good.  Ported would be a great choice if you want the "boom" of your bass music.  Not an easy project but the output of them can be greater then the sealed.  I would go for the sealed though.  Subs sound tight and accurate in them.  They are easy to build and can be versitile for many types of music.

great thanks everyone

eric