I'm trying to make accoustic improvements to my room. My wife won't let me put accoustic pannels or anything like that on the walls. She will be addign curtains to the room soon. I was thinking about building my own 'diffusor' using fiberglass insulation. What are the accoustic properties of fiberglass insulation. I was thinking about doing some type of pillar type treatments, only mine would be square. I was going to fill them with the fiberglass, then on the back of them attach accoustic foam where it won't be visible. Placement of these will be in the corners behind my speakers. What do you think, will this work?