I am in the process of obtaining one of Ed's system myself. I have a few suggestions about sound that you can take or leave. First, consider the source of the sound. If your DC is mounted on a wall, the wall can become a diphram that transmits sound throughout the room. It is usually best to isolate vibration rather than trying to make the mount more rigid. Moving air is a sound transmitter, so some of your sound will emanate from whatever exhaust port you are using. Also, air moving through ducting will produce noise, so that may be an area you can influence. Motor noise may be a contributor, but I understand Bill has some ideas about using carpet pad to isolate some of that. Consider using ceiling tiles (also called acoustical tiles) as a sound dampner if you build a wall, sound diverter, or sound baffle system. They are designed for sound supression. I suspect that I will have to shave sound using multiple approaches in order to have a sufficient impact. Good luck, and please post anything that you discover works well.
