I heard these speakers at RMAF a few years ago when Danny first brought them out. I think they were driven with a flea-watt Dodd amp. I think he was asking $10K for them at the show. I preferred them over the MBL and Wilson super high-end speakers at the show. I'd buy these in a heart-beat if my room size would accommodate them, but it won't. I still say they are the best speakers I have ever heard, but I suspect, to my ears, the Linkwitz LX521 would equal them. But then, I am a homer for Linkwitz speakers since I built the the LXmini's. Whitestix