The Cary is one of my favourite amps for it's sweet, forgiving sound, my AES version is similar. That said both amps in stock version suffer from a design error that causes slew limiting, an inability of the driver circuit to provide enough current to the output tube to allow the high frequencies and fast transients to react quickly enough. The result is rolled off, slightly sluggish sound. In the AES, the 300b's can be replaced with 2a3's or 45's and the problem is solved. Otherwise the driver stage can be redone ( I wrote it up in Glass Audio magazine in the 90's ) and the result bears very little comparison from the stock circuit- very fast, detailed sound. If you can put 2A3's in your Cary, reducing the bias current %20, you will get a taste of what single-ended is capabile of.
Good Luck and good listening
Richard
Good Luck and good listening
Richard