Choice d) Matched, balanced pair of identical nos tubes. And make them Amperex 7316's.
Tubes for a pre stage... matched NEW or unmatched identical NOS?
I have this question for so long:
On a integrated amplifier that uses a pair of 12au7 tubes (or alternatives) on the preamp section (Rogue Sphinx, for example) what is best option:
a) to have an unmached unbalanced pair of identical NOS tubes
b) to have of matched balanced pair of modern tubes
c) to have balanced 12au7 tubes no matter if they are matching
Once asked JJ why they didn’t offer matched 12au7 type of tubes and the answer was the it is irrelevant for the kind of use they are intended in audio circuitry. Is this right?
My question only makes sense when forced to keep tube-rolling costs down (or tube substitution when the stock ones fail) because the obvious and better choice is matched NOS, like those from Amperex or Mullard.
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- 38 posts total
Agree with vinylvalet…i have heard the same from several sources as well. Tube sellers charge a premium for high test results that may or not be a true indication tube health or SQ and say different. Buying tubes new or old stock is always a risk but test results are helpful for minimizing that risk. I much prefer old stock preamp tubes for their SQ and durability. Check out this link that explains more: https://geekmusician.com/do-preamp-tubes-need-to-be-matched/ |
I'll take matched thanks... I say this confidently because I have a tube tester and have had some new tubes that many would consider "junk" With a tube like 12ax7 , the tube's performance has a lot to do with whether each triode section is close to the other. There are two triodes in one glass envelope. The last few times I bought tubes I did pay for matched triodes, pairs, and screen for low noise and they were exactly as paid for. Excellent, quiet , super strong emissions. |
- 38 posts total