If your room has a bit too much bass reverb, this could help absorb some of that bass energy. Its 9″ in diameter and stands 36″ tall. This was previously used just behind the center channel speaker and absorbs from 110 Hz. Cosmetically, the tube trap looks good with minor scuff marks here and there. There are screw holes under one side where it was previously mounted on stands. If you need more tube traps, see our other listings.