I was playing a little game of "Let's see how loud I can play my new speakers," (M&K 850 system - love it!) and when I cranked some DVD-Audio music way up, the top of the picture on my TV began to warp. Yes, the center channel speaker sits directly on top of the TV. Is this to be expected with any shielded speaker at sufficient volume, or should this not happen, even when you "turn it up to 11"? I don't plan to make a habit of turning my system up to paint-peeling levels, but I'm curious if this is normal, and what kind of harm I might be doing to my TV.