I have a 2002 Impala that i want to install 4 12'" Kicker CVX subs in. I would like to know for SPL purposes will the subs sound better in a sealed box or a ported box. I have heard good things about both types of boxes, but I dont really have any knowledge in building boxes. Thanks for you all help.
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CEDRIC
Here is the first way I figure the direction to go in when deciding if sealed or vented is best (when I don't know anything else about the person or goals, that is). This is a quote from Guide: Using WinISD that you'll find stickied above:
Possibly the greatest value of this program is that it will enable you to model a vented box. Some woofers are best as sealed, others are best as vented. The EBP tells you the story, although it's not always 100% (hint: Solobaric wants a sealed, but everybody vents it). The EBP, you remember, appears in the center of the 'New project' box when you first bring up the new project. It is simply a calculation of Fs / Qes and a number is shown. The Kappa sub we were looking at above had a 50.7 EBP, which is within the range of a sealed enclosure. Higher EBP's generally call for a vented box. The program determines the best box using this EBP value by default. But as a working tool, the program allows you to change to whichever you want.
Another good topic for you to read is What is a proper sub box?.
Those subs definitely fit into the ported category.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.