At first glance you would probably want to go a bit deeper than 20 feet or bring it in a bit. 20 feet is too close to the multiple of 9.5 feet. You really need to look at all the modes, their spacing, and the Bonello criteria--then you can pick the optimum size. This is possibly the single most important aspect of the design, as it is difficult or near impossible to change later (at least very expensive) and trying to deal with room modes in other ways such as bass traps can be frustrating. Do check the links I provided--they are helpful--and of course if you want us to help you directly we'd be happy to.

rives August 26, 2003 05:42

Well, this might be the obvious question--"your building a dedicated room", but outside of that you've said just about nothing about the room. I got excited over "dedicated room", but how is it going to be set up, dimensions, modal response, reverberation times, sabiens. If you haven't built the room yet, take some time to learn as much as you can about acoustical properties of rooms--and by all means design it right, because redesign can cost a lot more than cables. Our website offers some good information, both the listening room (a basic tutorial on room acoustics), and our links which have a resource section for recommended books and other web sites that have valuable information when designing a room.

rives August 25, 2003 10:27