I auditioned both prior to purchasing the c2600 and to my ears the c2600 paired with the mc452 is a perfect marriage. IMHO tubes and classical music go hand in hand yet when I listen to jazz the 452 has the punch jazz begs for. As I recall the most significant difference between the c2600 and the c52 was the mid range.
My speakers are Sonus Faber Amati Futura's, but I would assume my conclusion would probably be the same with any good high end speakers.
My speakers are Sonus Faber Amati Futura's, but I would assume my conclusion would probably be the same with any good high end speakers.