Go join TT listen and compare the sound of seal and port...hard to explain by words actually.

From my experience, If you were used to ported box, u'll find seal box is not loud as ported. However, the bass is more deep and low (thumping bass) unlike using ported box which is boomy. The seal box is much nicer and clean sound. The best thing about seal is you can feel the bass vibrating your heart.

I love seal box but if like to play loud then go for ported box. But it depends to invidual preference and type of music you listen to

agree with captdude...subs with heavy magnet does not give indication it is loud especially those china made chap ayam although theorytically yes it is right. Big magnet need big power to push the subs.