I found that my trusty old ADCOM sounds quite good and will hold it's own against much more expensive amps, but has to be warmed for several hours before it smooths out and starts sounding good. Since I'm retired, I usually listen to my system off and on throughout the day and quite often late at night, so, when using the ADCOM, it gets left on all the time. Since both, my Rouge and Audible Illusions, tube gear, have soft start circuits and only need about 20 or 30 minuets of warm up, to sound good, I turn them off between listening sessions, to save on tubes....Jim