Glenn,
> it is safe to say that Ethan and I are out for one thing. Making people realize that your room sound is the most important thing in your room. <
Indeed. So let's kiss and make up, okay? But better pull the curtain first so Joel doesn't see and get all excited.
(Joel, I'm kidding!)
> On a 4" panel the sides can add 60% more surface area <
Almost. It's a 50 percent increase for a panel that's 2 by 4 feet, 4 inches thick. And that's a lot of absorption to discount!
--Ethan