I enjoy the concerto very much with my Edition 8. Completely agree with AiDee's characterization of its sound. It is a fast amp for sure. I replaced the opamps in the concerto to the AD797BN and it took it to a whole new level. Also going to try the LME49990 :-)
I am curious about the classic though. Might try it one of these days. Comments about the soundstage and fuller sound have me interested.
Hey - that sounds interresting. I would love to try the AD797BN. Can you say a little bit more about the differences to the stock OPAMPS?
How many OPAMPS does the Concerto have? It is 5 right?