My dad was a Jazz musician, music teacher and audiophile. One day, in the early 80s I believe, he brought home a couple of these:
My mom thought robots were invading the house.
I'll never forget how amazed I was at the sound, powered by the Carver Holographic amps (sounded better with the "sonic holography" off). We were the envy of all my friends and I would put on albums, sit on the sofa and space out to the music. The hook was in. (My dad passed away but those speakers are still at my mom's house, these days with things like potted plants sitting on 'em. I'd love to hear them again some day).
The first audiophile speakers I ever moved into my own house were the Quad ESL-63s, with the Gradient dipole Subwoofers made for the 63s. It was a massive wall o' sound with those things. (Even driven by my old Conrad Johnson MV55 tube amp). Despite many premium floor standing dynamic speakers having been in my room since, I don't think I've ever quite re-achieved some of the qualities of that set up which could be this astonishing, huge window on a performance, and dynamic as hell with the subs.
I loved them for quite a while. After a while though, despite the astonishing transparency of the Quads, I began to miss the body and "thereness" of a good dynamic speaker, so I've gone with dynamics ever since. That said, ironically, one speaker I still pine after is the original Quad ESL 57. It has a certain "something" to the tone of the midrange that escaped even my 63s and they still haunt me. I've nowhere to fit them, though.