Quite a while back, I decided to spend a weekend mocking up some DIY sound treatment for my room. The main driver for this was actually to create a good environment for recording guitar, but while I was at it I thought I may as well have a play. I don't have any major issues with frequency imbalances in my room - that being taken care of largely by speaker placement and the controls on my active subs - but was interested in the potential benefits of reducing reflections arriving at the listening seat. I therefore built a whole bunch of portable units of varying sizes. The basic approach was to build a wooden frame, slatted at the back. Fix to this some sound deadening underlay tiles and on top of those some acoustic foam treatment tiles. I deliberately built these portable so that I could try them out in various locations. Over the months, I have tried them in various locations - behind the speakers, to the sides of the speakers, at the sides of the room at the first reflection point, at the sides of the room elsewhere, covering the rear of the room. However, I've now settled on the best position and, against my expectations, I find these most effective surrounding the listening seat. The final result is that I hear a lot more variation in the recorded acoustic of various albums and it is much easier to pick up on these acoustic cues. It all sounds a lot less like musicians in my room and a lot more like I'm in their room if that makes any sense. Some pictures below of the finished article, front and back, plus one of the unfinished units which shows the rear construction: [IMG]http://i528.photobucket.com/albums/dd324/lbr_bucket/DSCN2357.jpg[/IMG] [IMG]http://i528.photobucket.com/albums/dd324/lbr_bucket/DSCN2356.jpg[/IMG] [IMG]http://i528.photobucket.com/albums/dd324/lbr_bucket/DSCN2358.jpg[/IMG]