Hi, I currently has the M60 set without a sub. I'm using denon 3806 to drive them. The problem is most often I get fatigue after listen more than half hr music around 75+db. my room is about 18'Lx12W'x8'H(carpet) open to kitchen 14'Lx12W'x8'H(tile floor). I'm think could this cause by reflection in the room or something else?? if so, whats the cheapest method to treat a room? I'm using autoEQ from 3806 for room EQ.