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Rectifier Tubes 5AR4 : New production vs NOS

Hello,

I am currently using a 2005 Cary Audio SLI 80 signature integrated amp. I had been using a new Electro Harmonix 5U4 rectifier tube, but recently was able to try out a new SovTek 5AR4. I was amazed at the meaningful sound improvement a different rectifier tube type can have on my amp. Now, I am considering investing some $ in NOS 5AR4's in the hope that will improve the sound further. However, my assumption had always been that the biggest impact NOS tubes will have over new tubes are in my preamp & driver tubes (6922 and 6SN7), since for these tubes are in the path of the music signal & they were much better made back then than the current production tubes. Would love your thoughts/experience on whether there would be much of a difference between NOS vs New 5AR4 rectifier tubes?

If there is already an extensive thread on this topic - pls point me to it, i haven't found one yet or i might just have missed seeing it online somewhere.

Thanks for your help.
longinc
brownsfan
1,508 posts
 
I have had excellent success with new production cryo'ed Gold Lion 5AR4. For the most part, I like them as well as the more common Mullard Blackburns from the 60's. You can get the GLs for about $40-50, a substantial savings over NOS Mullards. As Rodman said, the rectifier will have a profound effect.
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trelja
3,223 posts
 
I also agree the rectifier is important.

Mullard 5AR4 have set the standard for both sound quality and reliability. Look at how many are still in use, and the prices they command.

Based on Marty's recommendation, I may give the Gold Lion's a try. So far, for new production, I've tried Sovtek, JJ, and Shuguang. As usual, skip the Sovtek. JJs sound great, and a good choice if you don't want to pay for Mullard sound quality. I just wish they were more durable, as they easily arc over, then it's time for a new one. Shuguangs don't sound nearly as good, but have proven exceptionally rugged.
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bigkidz
3,313 posts
 
I agree with the Gold Lion tube. Also Music Full Music 274B if you can swap that one?
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