I am having a problem with sound vibrating the floors and walls of my home when I play the stereo loud - making it unbearable to listen too. This is a newer home and I've never experienced this problem in other homes with the same stereo. I've have a 500w system in a two storey house with speakers wired inside the walls to 2 speakers upstairs and 4 down. I've noticed that the 2 speakers in the living room (downstairs) are causing most of the problem but recently the ones in the kitchen (also downstairs) have also started to cause vibrations - can this be a result of the house settling? - it's just over a year old. Is there anything I can do to reinforce the floors/walls so this does not happen? Thanks.