As system quality improves, it becomes increasingly difficult to make lesser quality recordings sound agreeable. However, since this is all about MUSIC, the essence and spirit of the performance can be brought out regardless. Any system must have a SOLID foundation of the three pillars of audio: 1)power 2)acoustics 3)resonance control. Per a phone conversation on this particular subject with Albert Porter a few years ago, he told me that his system could successfully play any recording, but that any change could take him up to a month of tweaking to get it back on this track.