Are there any unique properties of the amps based on these tubes? Are 845 & 211 interchangable? Which are 845 & 211 good tubes that are cost effective & reliable?
I have owned both types of amps- I found the 845 more powerful and the 211 slightly more refined- if I had to choose, probably the 211 in the long term...
The 845M is smooth! Smoother than the 845B. IMO the treble is not forward, or irritating as you seemed concerned about. But the 845M is no longer in production unless Supertnt.com has started back up with a new version.
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