Using the Rives disc 2 CD that plays through the different frequency ranges, I had to make a modification to my closet door. It would vibrate at low frequencies. I used what was available around the house, which was a 3 foot piece of trim and some spray glue. I sprayed both surfaces and applied the trim, so that it held the door firmly in place when shut. The other noise was coming from one of the speakers as it hung on the wall. I pulled it away from the wall and let it fall back, this fixed that problem.
