I heard them in a friend of my sisters house, who worked at Harmony House in NYC. I cant remember the amp (or receiver) but I remember a Sony Tone Arm that totally blew my mind. he used a glass cake cover to go over his table, or at least, thats what it looked like. he played the most uninteresting piece of classical music I ever heard, and I was glued to and moved b y every single note. If thats not a compliment to those speakers, I don’t know what is. That experience pushed me into the high end, 40 years ago.