Ported vs Sealed Box Enclosure
 

70% of your sound of your subwoofer is due to the design and build quality of your sub enclosure. When picking a subwoofer box, deciding to either go sealed or ported will determine how your system will sound.

...read the full guide here with pics

RE: Ported vs Sealed Box Enclosure
 

go vented if you like it boomy or you have a puny amplifier...go sealed if you like sound quality or you have the franken amp.