I currently own a Cary 300SEI my first and only SET ever owned. Curious as to what I'd potentially gain/lose by buying an amp based on the above tubes in the same league as the 300SEI (approx $2,500 used).
Personally i think the Cary 300LXI has poor dynamics and weak , rolled off bass. Depending on your speakers, any 300B,2A3,45, or 845 should be considered. Do some auditioning with your speakers.
Your question is perplexing: what exactly do you want to know?? The product differences? There are very many products using the tubes you mention... The difference between the tubes?? If so, it's difficult to say much more than that the 211 is more powerful & slightly more extended in its linear operating region than a 300b. The 845 is also a more powerful amplification tube... They use different voltages and output trannies. Ultimately however, the sound you get depends on the circuit as a whole -- not only the tube. You're listening to a 300b already...
I was expecting to hear something like, "In General, 300bs have better midrange compared to 845 and 211 but you give up power, 845 have better frequency extention and more details than the 300b but is close to the 211, etc."
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