When you see the phrase "disappearing act" or "the speakers disappeared", this is what they mean. You hear the music, however, if you close your eyes you don't hear the music coming directly out of the speakers. This is a key audiophile attribute IMHO. If your speakers sound good tonally, have frequency response that is high and low enough for your taste and they also disappear, you've officially got yourself an audiophile system!
Enjoy it........
Enjoy it........