Two systems, as I think back over my audio salon haunting days, that I still remember as blowing everything else away: Audio Research D-79b/SP-6b on Martin Logan electrostatics and Levinson ML-2/ML-1 on Magnapan Tympany IV. I don't remember the sources, but they were both turntables.
The Levinson was the most impressive. I couldn't afford them back then. I've actually thought of buying a pair now, but they are 40 years old, and the last vintage amp I bought (British Fidelity A-1) played for an hour before crapping out. (I managed to bring it back to life by shotgunning all the caps.) Plus they won't power my Sound Labs speakers.
The Levinson was the most impressive. I couldn't afford them back then. I've actually thought of buying a pair now, but they are 40 years old, and the last vintage amp I bought (British Fidelity A-1) played for an hour before crapping out. (I managed to bring it back to life by shotgunning all the caps.) Plus they won't power my Sound Labs speakers.