Its always advised to keep your sub under your desk for the best sound, yet for most people, their tower is also down on the floor not too far away. So now i'm wondering, is this safe? Most of the stuff in computers is non moving, but for things like optical drives and especially hard drives, can this excessive vibration/pounding from the sub be dangerous? The space between the platter and the r/w head in a HD is like the size of a human hair and is easily scratched, so couldn't the vibration be bad for it, and perhaps is causing all these noisy/failing HD these days?