I would like some of you folk's advice from experience and knowledge. I have a newly built ST-70. I am buying a set of Gold Lion KT66 tubes to try. I also have an opportunity to buy a quad of NOS GE 6L6GC tubes. Would it be worth using the NOS tubes versus the new KT66 tubes? Does anyone use NOS 6L6GC tubes or have you used them? What is the difference in performance? I would expect the NOS American tubes to last longer.
Thank you all in advance.