You may want to try temporarily stacking some absorbent material in the corners (blankets, pillows, rolls of carpet, etc) and hanging cloth on the walls just to get a sense of whether or not you can hear improvement like I did. When I did this, my frequency response became smoother and I got a 2dB boost from about 30Hz to 90Hz. Now I need to figure out how to make this permanent while respecting my wife's wishes . Maybe an SMS is the way to go.