Tpreaves, if this had occurred in the 60's,or 70's, there would be other possible explanations; but I remember what I heard, and since it was gone the next day, it seemed like some sort of "opium dream" that had occurred during the night.
I've had my hearing tested and it's better than the equivalent of 20/20 vision. While that may seem impressive, I've been with other audiophiles who could hear better. I mention my hearing because what I heard defies belief. For example; the difference between the youthful feminine exuberance of a vocalist when she first came on the scene in her early 20's, as opposed to after she became a household name.
I'm listening to the same vocalists on the same system now, and I seem to be missing that aspect of their delivery. Since what "audiophiles" can hear goes far beyond any instruments ability to measure, it would take a coordinated effort of scientists and audiophiles to reconstruct the perfect power that boosted my system to such great heights that night.
As an "extreme music lover", I once listened to music with an "extreme audiophile". He had a battery powered amplifier. We listened to music for hours on end, and that is the only similar experience I can recall.
Learsfool, that "extreme audiophile" said the same thing about his experience with power conditioners; which is why he had a DC powered amp. While perfect audio is possible, it's too far beyond the reach of most of us to even consider. Enjoy the music.