For me it was KLH 9s in a warehouse room in the building with a book store in Anniston, Alabama in 1973. My wife and I visited the store, and I mentioned to the owner that I was an audiophile, and I wished he sold LPs. He said no LPs, but he did have a killer stereo in the back room. The electrostats were powered by McIntosh. The souirce was a turntable. The sound was spell binding.