thanks for the upload man, they look good!
Thanks! Used in conjunction with Auralex stuff, they worked really great, and for a fraction of the price.
I have a question.
So the Ethan Winer panels have an air gap between the rigid fiberglass and the plywood skin.
The sae college ones have the insulation glued onto the back of the plywood skins.
The Winer ones, it seems woud allow the sound to transform into mechanical vibration more freely. However the sae ones would dampen that mechanical vibration but may also (if I am correct in this) lessen the reflection back into the room?
Or am I just
in off here? Is there no difference?
I studied a LITTLE bit of acoustic engineering, but I'm by NO means an expert. There's probably other people on here that can answer that better. But when I made mine, I didn't like these two points you brought up either. Because of that, and part laziness
, I made mine much simpler. Just a panel of fiberglass, wrapped with cloth and hot glued, pushed into the wood frame and glued in place, and then just hung on the wall. Mine probably are not as effective as the others, but they worked great. And an advantage, if I wanted the room to sound more "live", I could easily take a few down when needed. I made two different sizes: 4 inch (deep) wood frames with a single 2inch thick panel, leaving a 2 inch air gap. And 6 inch frames, with single panel, leaving a 4 inch gap, or double up on the panels, leaving a 2 inch gap.
Like I said, I'm sure mine are not as effective as the others, since the backs are not sealed up. But that was more trouble than I wanted to go through, and these worked fine for me.
If you want to get really deep into acoustics, there is a subforum over at recording.org (where Ethan posted a lot) that is entirely about room treatment/construction.
http://www.recording.org/forum-34.html I haven't been there in a while, but there was always really good info. there.