Thanks to all who have responded. I will sit out the break in period of 40 hours. On red book CD I am doing this for the most part by playing the 777ES into the Audible Illusions while the AI is in mute with the volume controls set to nothing, and the tubes are either in stand-by mode or just left one. I am putting on about 20 hours a day this way. I am now at 260.
Thanks again and I will report back with my observations at 400 hours.
Thanks again and I will report back with my observations at 400 hours.