My room is in the basement of My home it is 16.4 wide and 23 feet long the ceiling 7 foot 6 inch high. Speakers on short wall bass traps in every corner traps at first reflection points traps and at center of front and back wall and one other trap on the wall . I also filled the space between rafters with fiberglass 10 inch thick and covered the ceiling with fabric room sounds great. The walls have 6 inch fiberglass insulation , new electrical lines for stereo no video in room but a lot of records. Marc