I've read good things about the 6AR6 tube, with a caveat. Many amps need to be modified to run them, as they do not like more than 300V on their screens. Many 6L6 and EL34 amps run hotter than this. I have no idea what the Inspire amps are spec'ed at on the screens. It is said that the 6AR6 lifespan will be short if run at 350V or higher. They also are said to sound their best with a screen voltage of 275V to 300V. So it may need more than a tube adapter.
Same is true for the Bendix 6384 tubes, which don't like more than 325V on their screens.
By comparison, a KT88 can handle up to 600V.
Last edited by Bombadil; 11-01-2017 at 07:03 PM.
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