Power amp tubes go bad sooner or later, and retubing can be costly. And sometimes they go kablooey (technical term) and take out other components with them, which is even more costly. Some stuff to think about.
Maybe try something like a class A solid state amp. Pass Labs makes good stuff, and their customer service is fantastic.
Maybe try something like a class A solid state amp. Pass Labs makes good stuff, and their customer service is fantastic.