The cronus mag ii is an outstanding amplifier .I highly recommend it . Very detailed with accurate imaging . I’m fed up with buying nos tubes . Its a total crap shoot. I am going to stick with new after this. New mullards sounded woody with rolled of highs . So far so good with gold lions. Some nos tubes are horribly microphonic which you never get told about . If you sneeze you can hear a “tink” in some of them .