Just recently helped a friend complete his first DIY subwoofer. He is happy with the sound so far and the design leaves room for a driver upgrade for even more output. I went and made this design a bit different as far as the looks go for the port. We went with a triangular shaped port instead of a slotted port or traditional round one. The port is going out the front and speaker itself is offset by an 1 off center to complement the look. For a $15 dollar sub, it sounds pretty good, it doesn’t go to low, but does at least hit the 20hz area nicely.
Here are a few pics of the sub.
Clamping for the triangular port before cutting. That was a challenge to clamp. Only the first baffle has been attached so far.


Front of box with second baffle attached.

First coat of primmer applied. This really helps seal the MDF up, and makes getting rid of the fine lines easier. Granted there is a lot of sanding involved.

Back of box with sub amp hole cut out.

A closure look at the triangular port.

First coat of paint with cheap spray paint. (Note never use cheap spray paint, it sucks period)

Second coat with much better quality spray paint. It actually doesn’t dry in the air.


Harley will need to upload the other photos he has on his camera. But that includes the final look with sating lacquer applied. Over all it sounds good, leaves some room for improvement and he is happy with the results.