I too would be interested to hear if it's all your speakers or not. Does it happen all of the time? Does volume make a difference?Which amp and speakers are you running? If it's only one speaker and they are pretty old, it could be the surrounds. If it's all your speakers then it could very well be the amp.
It's from all of them and Happens When I get it played from a laptop. Any thought if this could be the culprit behind it? I am really starting to doubt that.