I've had my Adante AF 61s for about 4 months now. I'm using a PrimaLuna Dialogue Premium tube preamp and a McIntosh MC152 solid state power amp. This combination works well for me. When I first got the speakers I was using a PrimaLuna Prologue preamp with the Mac. The speakers quickly revealed that there was an impedance mismatch between preamp and amp. It is hard to explain but the setup just sounded off from what I expected. A bit of online research pointed to the impedance issue. The PrimaLuna Dialogue includes a cathode follower circuit dropping the output impedance into a good range for the Mac. Fortunately the folks at Upscale Audio were willing to allow me to trade up to the Dialogue at a very reasonable price. Kudos to them. Now the system sounds great. I close my eyes and the speakers disappear and a wonderful soundstage appears. This certainly confirms that system matching is very important with these speakers.
