A friend of my have a HT setup with a 32" direct view TV and a HTiB. When he plays certain DVDs, the piciture shakes. I noticed this happens when there's low-frequence, like Pixar's opening animation. My guess is that the cables should be shielded but is that right? The subwoofer is placed next to the TV cabinet, we tried to move the sub away from the walls but that didn't help either. Any feedback would be appreciated. Thanks.