Hmmm... I'd not heard of this problem prior to your post. I actually run two of these beasts in a very quiet dedicated room. They cover the bottom-most octave only in a high-end two-channel set up. One of them is only a few feet from the listening position (between the back of the couch and the CD racks mounted to the rear wall). Sounds like there must be some variability in the quality of the power supply transformers. You don't live in a place that uses 50hz ac for power are you? I know some people have posted similar concerns about gear that didn't behave as well on 50 hz ac as it did on its native 60hz.
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