>Indeed. It's also the panel without the wood back side. <
Don't get me started on those panels!
Guys what Ethan is talking about is broad band bass traps with a piece of plywood on the back.. It will not work..
>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!<
