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Re: Which 5AR4 is best for Bass.. Ruby, Sovtek, Sino, Valv Art, etc.

In my system the differences between 5AR4's typically are from 20Hz-20kHz. If they're weak on the bottom they are thin in the midrange and tinny on the top as well.

Using the venerable Mullard as a reference, I find the latest Sovtek and JJ's to be very close - but I haven't used them long enough to comment on reliability. I had a lot of Chinese 5AR4's blow up on me, so I stopped using them. I've read that their high failure rate is closely associated with Dynaco equipment - I don't know the details.

IMHO the JJ's and Sovtec are so close not only to the Mullard but to each other, that any future purchases I make will be based on reliability. I think most of the current 5AR4's have come a long way in terms of sound quality - and getting somewhat better in regards to reliability.


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