Cary sound? Liquid, immediate, delicate, involving, holographic, with best female vovals I've ever heard. Macrodymamics could be a little better, but than again, it's not a monster solid state Krell... As far as the tube life goes, the KR 300B in my 300B SE signature monoblocks still work great after almost three years of heavy use. All the 6sn7's test good too.
