Hi, hopefully I've put this in the correct area? I have a qacoustics m4 soundbar, its excellent, I think so anyway. It has a built in sub, a down firing one.my av rack is a Sound Orginisation one that I've had for ages and am reluctant to part with, however it has glass shelves and the bass really travels through the house and probably next door!! Any tips on how to control this? Cheers Jim