My walls are made of metal studs with standard drywall then covered in plaster. The problem is that I can literally hear them resonating. Not exactly sure what frequency its at. But I believe it would be considered as midbass. It is really annoying and now that I notice it more it is turning my system into a low volume experience in order to avoid it. This added layer of noise or harmonics not sure what you would call it is causing me listener fatigue. My speakers are only about a foot from my front wall but I dont have much more room to pull them out. So what type of room treatment can fix this? I'm about ready to hire a contractor to come out and redo the front wall with different materials. Not sure this would be very cost effective though.. Any advice would be appreciated I would like to get a couple more DBs out of my system. Forgot to mention my floors are concrete covered with carpet so the resonations are not starting in the floor and moving into the walls.