Overly sensitive tweeter/midrange

I have Sonus Faber Amati Traditions. They sound great on 85% of music. The other 15%, I swear I hear some type of ugly noise in the transients. Of course, I can't explain it better than that, and my wife can't hear it at all. It sounds like a pop or a click you might expect from a broken driver, but much more subtle. I've tried to determine if it's one speaker or both. I can really only hear it on one speaker, but who knows. Is this something anyone else has dealt with that might remotely know what I'm talking about? I don't think it's just the recordings.