It took about 250 hours for the unit to mature. Base did improve and the depth of the sound stage grew larger. The general warmth and musicality stayed consistant after about the 100 hour point. By the way, I'm driving Avalon Ascents which are not easy speakers to drive in the base department. The 350.5, however, does a wonderful job of surprising audiophile friends who heard these speakers driven by various high powered tube gear. (VAC, BAT,
ARC ) Even some of my tubes or die friends have had a hard time finding fault with this power amp.
Jeff
ARC ) Even some of my tubes or die friends have had a hard time finding fault with this power amp.
Jeff