Do NOS Mullard EL34 tubes last much longer than NOS SED (Svetlana) EL34 ?

New Tung Sol EL34B

I have used mullard xf2s, wing Cs, JJs, and a few others.  Then I found Gold Lion KT77s from upscale audio was the right choice for sound, reliability and price.  

jetter, you are probably right in that I should try these Gold Lions reissues.

In fact, Kevin of VAC told me that he no longer used any NOS output tubes in his own reference amps. This opinion has a lot of weight. He also said that in his power amps output tubes affected the sound less than driver tubes. I currently have RCA black plates 12AU7 from 50s and like them.

Maybe I should forget about those very expensive Mullards, yeah, but the doubt remains.

I have NOS Mullard el84’s that I use in a Leben 300xs. They are special tubes. I would seek them out again along with some other NOS tubes. I

I’ve owned many amps over the years, even some of Kevin’s amps, and can say they make a difference to me. A sense or ease, a window into the notes and texture that is unmistakable to me. I do agree power tubes typically matter less, but if you want to go further you can.

If you have the funds to experiment with old and new I recommend it, but tubes are all magical in their own way so play within your comfort level.

Bjesien, is correct on the nos Mullards, they have a sense or ease. In my system it has a natural sparkle to them I’ve found no other can do. I have a class A that can only use kt-120 and kt-150’s so sometimes it’s nice to go back to the Mullard el34 sound.