when you did your last round w/ the cloud - was the cloud positioned directly above the listening position or was it at the ceiling reflection point?
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Looking for a little guidance on soffit style corner bass traps. I was originally planning to build some of the style Eric2000 describes above. Then I decided that I would get more benefit from square/rectangle style traps since they will be behind a false wall that houses my LCR and subwoofer. This is a crude sketch of the soundstage as planned:
There are 7 traps that are approx. 23" x 23" x 42" in size and 5 smaller traps approx. 18" x 18" x 42". The concept I'm working on to attach the traps and avoid compression of the R-30 pink fluffy (raw insulaton that's 9" thick in a roll of 25' so 2x + 5" slit for the larger traps and 2x for smaller traps) is to make "socks" out of burlap and hang from the back wall. I'm wondering if I should be concerned about sag causing compression over time and reducing the overall impact as I'm trying to have an effect below 50 Hz? I've read on other sites that 3.5' or 42" is about the max before the material starts compressing on itself. Do others agree? I'm trying to avoid the wood frames from Eric2000's design to maximize the absorption. The burlap sock is basically just to keep the insulation tidy and provide a means to hang it to the drywall (so I don't need paper backed material). Any other thoughts or suggestions? I'm also planning to fill in some of the other open spaces shown as I have a real issue in my space with echoes and long decay times.