No, that's not normal. I have two and they've never made a sound.
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Just got one of these two days ago and it has done nothing but click and squeak allmost nonstop. I am running mine from one of several dedicated circuits that has nothing else on it. I am going to try a couple of different things before I send it on its way. Needless to say that this is very loud and annoying. I knew better than to buy Monster products but I wanted to give this thing a try. I'll probaly end up with more PS Audio gear or maybe Tice.