Redsy:
If this helps:
We installed 6 MG sets in a room adjacent to office area. The GC came up with this "dimpled" foam stuff. Looked like something you would put eggs in.
Black acoustical foam, about 2" thick, dimpled, & about 3' square.
Either WW Grainger or McMaster Carr has it in catalog I think.
If you're interested, let me know & I'll find item ## & $$$
John
