I am glad you had a great time!
So what do you (most or all of us) need to add to (or eliminate from) our systems to approach the level of energy you heard?
Hi Ron, I really don't have the technical background to answer such a question. I suppose one could start with trying to reduce distortion and increase things like dynamics and that sense of effortlessness. More specifically, we could strive for a more "natural" sound from our systems, and one that avoids "hifi". Of course, that is easier said than done.
I harped a bit too hard on a friend by repeatedly asking him to describe the very slight differences he heard when comparing the same excellent recording on two different sources in his system. He finally responded by saying "You will have to hear for yourself; timbre is just hard to describe." I think this pretty well sums it up. We have to use our own experiences to make judgements, our ears to assess progress with our systems, and the advice of those who have more technical knowledge to help guide us toward gear that best addresses some of these audio challenges.
It is worth noting that my host is a baritone who still sings and occasionally records. He is also a music lover. I visited him a few years ago and we met in his "music room". It was a large, cool, stone-walled space surrounded by shelving filled with records, mostly opera. In the center of the room sat a round table, a few candles, a picture frame, and a couple of chairs. We drank some wine and listened to his two modest speakers from his old turntable and receiver. The speakers were outside in the hallway leading to the room. We could easily have been in a dimly lit wine cellar tasting Burgundy or Chablis.
I later invited him to hear my system and suggested he bring some music. He brought some Fischer-Dieskau among others rare, original pressings. I asked him what he thought. His responses were all about the performances, the singers' emotions, the various interpretations of the music. They had nothing whatsoever to do with the quality of the reproduction or sonic attributes. He could not have cared less about any of that.
I like to think that he could more deeply appreciate the qualities of those performances through my fairly good system, but I will never know, because I could not bring myself to ask him. In the end, we devote a lot of time and effort to assemble what we think of as satisfying high end audio systems. In reality, they are just music delivery devices. The music, and the thoughts and emotions that it conjures, is what matters to my friend.
That lesson and experiences like the one Al M. and I enjoyed yesterday in this friend's living room, are the reasons I enjoy my friendship with the host.