In the early 80s, a friend bought some speakers that were new to me. I had never seen such, and I never have again. They were frames about five feet high and maybe 20 inches across. They had wires running from the top crossbar to the bottom crossbar. They were speakers, and they produced amazing sound. They were also quite expensive; as I recall, she paid $3000 for a pair, which was a great deal of money 35 years ago. Can anyone tell me what such speakers were called, and if they are still sold?