Thanks. I went to the web sight. Quite a bit to digest. I work for a high end home builder, so building the bass traps will be easy to build. I have three finishing carpenters that I can go to for advice. How do I know whether it is the upper or lower bass trap that I should build? I'm thinking of making it look like a couple pieces of furniture once I know what type of traps I need. Has anybody tried that. If so, is there anything that can be learned before I give it a try? There are usually some unforseen problems that make the project interesting. If I can figure out how, I will post a picture.