I am about to start acoustically treating my listening room. I had previously added treatments, but want to do things with a little more care and with some measurements to document the effects. First up, will be a set of 5 diffuser panels for the rear wall. I have built the panels based on this design: http://arqen.com/sound-diffusers/ Finished painting the panels today so will include a picture of one while it cures. I will be building several absorbers for the first reflect