Before you buy any room treatments, read Jim Smith’s “Get Better Sound”. He has several sections relevant to your question...starting with determining the best position for your listening chair and loudspeakers.
Jim Smith’s profession is setting up and consulting on residential and commercial high end audio rooms and recording studios. He’s received several best-sound-of-show awards.
Jim Smith’s profession is setting up and consulting on residential and commercial high end audio rooms and recording studios. He’s received several best-sound-of-show awards.