When it comes to subwoofers, by far the most important aspect of the enclosure design is the net woofer volume, which will be determined by the desired bass alignment and extension. In our design, we will use a small .65 cu. ft. sealed enclosure to minimize the physical size and at the same time allow us to take full advantage of the subwoofer amplifier's power. The overall dimensions or proportions of the enclosure are insignifi cant at low frequencies, so the shape of the box is not important. Due to my personal preference for geometric objects, I chose to make this subwoofer a cube.

While on the outside, it appears as a pretty standard 15" cube, it does have a few things going on in the inside that are different from what is normally seen. It uses 1" thick material throughout, which was chosen to maximize the rigidity and weight of the cabinet. (Keeping the weight of the cabinet high will help to minimize the vibrations of the entire enclosure, which robs acoustic energy.) I chose to use MDF to subdivide the enclosure into two parts, one for woofer airspace and one for the amp. I knew that the pressures inside the cabinet would be extreme at high excursions, so much so that even the best plate amp would have difficulty not allowing air to leak around the controls and inputs. Also, the front baffle is 2" thick, which allows the woofer to be recessed 1" into the front of the cabinet. This was done for aesthetic purposes, and is not necessary to the performance of the system.