Unless you've really got some goofy settings, I don't think the rest of your system could be causing you discontent. Just so we're clear, you're playing regular old redbook CD's as a source and minimizing any processing done by the amp?
As much as I (and others) may hate to admit it, it is also possible that you have really great ears and simply don't like the overall profile of the M3v3. Personally, I think it's a pretty terrific speaker, but your ears, your room, your music, etc.
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