So I just bought eight pieces of high density foam. They are 4ft by 6ft. Just having them in the room as they are in the pictures has made the sound at least twice as good, without any kind of strategic placement. My main questions are these: 1. Do I benefit in any way from hanging them lengthwise and having them go all the way to the floor? Or should I put them horizontally and leave the bottom space open this way I can cover more of the room. 2. Should I use them to cover the corners in order to trap some of the base? Or is that completely futile oh, and I should just put them flat on the walls leaving the corners open. 3. Should I put one on the ceiling? Any other suggestions on where to place these would be greatly appreciated. Thanks!