Here is a cool DIY bass horn project you should check out. The design is from my friend JC but the kit is the brainchild of Fast Lane Audio. They have several horn kits available but this is the latest one. I own several of JC's bass horns and they are all a lot of fun as I expect the minipunch is as well.
Here is a video of the build process JC put together. It is very detailed and he doesn't miss a thing. If you want to pick up a kit from Fast Lane Audio this video is a must watch.
Some pics of project in progress.
Fast Lane Audio does great CNC work which makes these projects so easy to put together.
I can't wait to here this horn project.