Best of current 12ax7?

I really like the GE 5751 NOS. I use it in my ASL headphone amp. This tube is a direct replacement for 12AX7. For new 12AX7's try the Tung Sol. (very good for the price)

You need to be careful with using a 5751 tube in place of a 12AX7. The 5751 has only 70% of the gain of a regular, typical 12AX7. These work GREAT in some gear, but it really depends on the circuit design. If they will work, they are indeed excellent tubes.

For new production 12AX7 tubes, I have used and really like the Mullard reissues and for a little more money the Psvane 12AX7s or the Sophia 12AX7s.

Hi Rja

With a tube phono I really like the Sovtek 12AX7LPS tubes and the newer Mullard CV4004/12AX7 tubes.

With a Jolida Tube DAC 2 I really liked the Genelex Gold Lion 12AX7 tubes.

In my Jolida amp my favorites are the JJ 5751 tubes, and Ruby 12AX7AC7 HG+ aka TAD 7025-S and Preferred Series 7025.

Sorry if I'm confusing you. I enjoy all of these tubes and haven't had issues with SQ, build quality or endurance. A majority of these tubes were purchased via Doug's Tubes, Jim McShane and Upscale Audio. That may be why I haven't had any issues.

I've gotta agree with jedinite24 regarding the reissue Mullard and Gold Lion 12AX7's.

Psvane 12ax7 treasure series TII. Awesome tubes.

I'll second the Psvane TII's. The 12AX7's came very close sonically to my reference NOS Pope's, for a whole lot less money. They are not cheap compared to current 12AX7's, but they are less costly than many NOS tubes, and quite good.

Black Sables are very nice for the money.

Tube rolling has one problem from sonics: It will show YOU what it can do in a given unit, with a given design, with a given layout, with given tube sockets, with the output range of a given preamp and so on. Change the unit and you can start all over again. Too bad for those who desperately look for the one and only super tube :-)
Anyway, my vote is for Psvane 12AX7 treasury series. Excellent performance for their price (compared to NOS, which are normally not NOS).

I'm not looking for the one and only super tube.

Fortunately with the prices of many of the recommendations above it's actually possible to roll a few without going to the poor farm. The great NOS stuff can be difficult to find and expensive, getting more so all the time. I've seen some of the great old 12ax7's approaching $1000 a pair. I have some NOS tubes but was looking for something a bit more down to earth and realistic.

TJ Full Music 12ax7's.

On your recommendations I have ordered a pair of Psvane 12AX7's. May order some other brands mentioned as well, all for the sake of experimentation. Thanks for the responses.

No one mentioned Sophia or EAT 12ax7's. The EAT's are very pricey for a new tube but some reviews I've read rated them highly. Hard to find information on the Sophia's.

One thing for certain, there are a lot of new (non-NOS) 12ax7's currently available although most are probably coming from the same factories but with different names and different quality control standards.

I mentioned the Sophia tubes, see my above post. Excellent tubes.

I agree that the sonic result is dependent on the context and application. I have had good luck with and enjoy JJ, Sovtek, Genelex and Telefunken in a variety of applications, power amps, pre amps, phono stages and guitar amps. It all depends, which is why rolling to find what is good in a given context is de riguer.

Sorry about that, yes I saw your mention of the Sophias. Can you name a good source for them? Thanks

Rja...I bought mine from Galen Carol.

https://www.gcaudio.com/cgi-bin/store/showProduct.cgi?id=791

Hi Rja, I believe that buying from a reputable dealer that fully tests their tubes is the most important aspect of tube purchases.

I see Galen Carol also sells the EAT tubes. HE also sells the RFT tubes which I've never heard of.

TJ Full Music was better than the Psvane in my Thor preamp.

my favorite new production are the Tung-sol gold pins, great balance between detail and warmth.

Would the PSvane's sound better than the EI 12AX7's? I have those in a CJ preamp phono section, was contemplating getting actual Telefunkens.

You asked about, "the best" of the modern 12AX7's,
in terms of build quality, sound quality and endurance. Seems
you already found it: the EAT!

Those EAT's cost as much as some very fine NOS tubes.
1. Purchased Psvane 12ax7's.
2. Purchased Sophia 12ax7's.
3. Own a pair of Telefunken smooth long plate 12ax7's.
I will try others. Thanks for suggestions so far.