Enclosures

In the world of car audio the type of enclosure is a huge varible on what the resulting sound will be. The enclosure or box is most commonly made out of a high density wood particle board or MDF board. The size of the woofer makes a difference is the thickness of the box. If you want the woofer to hit a lower note the box needs to be a little bit bigger, and if you want the box to hit higher notes you would build the box smaller. I build most of my boxes to get the most sound with the best sound quality out of each box. The best frequency for 12 inch subwoofers is between 45-47 hertz. The way you would obtain this frequency is to build the box and figure out how large the port needs to be.

The box i have currently is 12.8 cubic feet with a 48 by 4 inch port tuned to 46.3 hertz. I built the box so that each woofer is getting the same amount of airspace after the displacment of the magnets on the subs. Sealed boxes are normaly smaller then slotted or ported boxes and wont hit as low but work well in tight spaces, such as behind a seat in a pickup. The box will make or break a system, and can make cheaper subs in a better box sound better then a good pair of subs in a terrible box.