my buddy at work hit me up on this. i have no clue. he has a jbl center speaker. when it sits on top of the speaker, it makes a slight noise. (i can't remember if he said hissing or buzzing, but it's making noise.) it makes this noise even if there are no speaker wires connected to it. what's weird is if he moves it away from his tv (27" tube), the noise stops. so, it definitely has something to do with the tv. question is...what is going on.