Sony’s Xplod subwoofers feature a unique pentagonal cone that provides a large surface area for high-performance bass output. Despite the pentagonal cone, the woofers are built into a more conventional circular basket, so they can be mounted into standard sub boxes with a round speaker cutout. If you don’t want to purchase a sub box to mount your subwoofer into, it’s a fairly straight-ahead task to build your own sub box to mount your Xplod 12-inch subwoofer into. Writer Bio

How to Make an Xplod 12 Inch Subwoofer Box - 42