How big of a box do I need for a 12 sub?
According to the JL Audio website, the recommended volume space for a 12-inch subwoofer is 1.25 cubic feet.
Is a ported box louder than sealed?
If you like your music “boomy”, vibrating your car’s body panels, you want to consider a ported (vented) enclosure. These types of enclosures, when built with the properly calculated volume and tuned to the correct frequency for the subwoofer, are generally louder than a sealed enclosure.
Does depth of sub box matter?
As long as the volume is where you need it, whether it’s a shallow box or deep box doesn’t matter. With 6″ of internal depth you’ll be looking at fairly shallow subwoofers, but if it’s 8″ of depth you can use almost anything.
Can a sub box be too big?
Remember, there is such a thing as too big. As the size of the enclosure increases, the mechanical limits of the woofer will be easier to reach. If the box is too small (by a reasonable amount) add power.