So, I have been using my Reference 3a Di Capo i with my EAR 890 and Klyne preamp. This is a very good speaker, definitely recommended. It doesn't quite match the sophistication of my ESL 57, but they are growing on me. They like tubes, and my Klyne preamp might not be the best fit -- they are just a tiny bit too detailed with some recordings, and if a recording is bad, they definitely don't help it.