Ed.......I dont think the ceiling panel is staying, it seemed to lower the soundstage a bit and
just doesnt "feel" right......hope to get some suggestions on types of diffusion panels (perhaps another poly?) to place there.
As far as additional info on the poly diffuser, that would be Eds department. I out right stole
this idea from him...with permission of course

....and I'm glad i did. There is a ton of DIY
info on making the panels.....but as far as diffusers I found it confusing and a bit daunting.
The poly panel is made from 1/8" masonite(?) and I built a frame from 2"x2" lumber....I know Eds
is fixed to the back wall, but my dedicated 20amp plug is behind it and by placing it on feet it allows
me access the the plug and hides it and the cords at the same time. It was an easy build...about an hr and didnt cost more than $25 for the materials.......and it works really well!
Thanks for all the compliments, its turned out to be a great listening area....couldnt of done any of it
with out Audio circle.....from the great speakers from Danny to the room itself....

Perry