Originally Posted by grendelrt
Yeah etc graph says 4.65ft to the point on the ceiling, so that's 4.65inches at the hight point of the diffusion material? For a 2" roxul panel I wonder if I could get away without framing it, maybe use a back board and fabric, 2" seems doable at least.
The GIK 2" panels are 3.625" thick since they have a built in plenum. The Acoustimac 2" panel is 2.25" thick with backing (I have the Acoustimac and I measured it). If you can spare slightly less than a 1/4" I'd go with a backing, it just seems like it would be easier to mount.
For flush mount to a ceiling I would choose the Acoustimac z-bar, http://www.acoustimac.com/acoustic-i...ation-hardware
, I've used these and like them, they give you a little wiggle room as apposed to the ATS z-bar, https://www.atsacoustics.com/acoustic-panel-zbars.html
, which I have also used, they give you a supper snug fit, no wiggle room so it would scar any surface you use them on when you mount a panel, the advantage being that you're not going to have any rattles to deal with (I've cleaned up mounting hardware rattles by putting cloth around z-clips and z-bars). If you have a panel without a backing you could possibly use Rotofast anchors, https://www.atsacoustics.com/cat--Accessories--103.html
, I've not tried them so I don't know how well they work. I'm just not sure how to do a supper clean look flush mount without a backing.