Phono Preamp Tube Rush

SUT is the easiest way to get low noise input.  Works very well. 

I'm thinking all-tube may be possible using a pentode into a load of 10k or less.  Then again, microphonics will become the new problem... 

So curiosity got the best of me and I decided to try replacing the original EH 12AX7 1st gain stage tubes in my Herron VTPHA2A just to see if I could reduce the noise floor a tad.  I went with Gold Lion reissue ECC83/12AX7 tubes from Upscale Audio - ordering the quietest option they provide.  My expectations for improvement (over an already gorgeous sonic presentation in Keith's stock tubes) weren't particularly high but I was pleasantly surprised when I immediately realized a notable difference.  Tube rush, and still only at very high volumes, was reduced probably a few dB but even more surprisingly the sound character changed for the better as well - the Gold Lions delivering a very smooth, more richly dynamic presentation that's been improving further over the 10-12 hrs I have on them now.  Just thought I'd share the experience with anyone interested.

^ that’s good to know sir - ty! 

That's great news about the Gold Lions. Now that you know that you can improve the VTPH-2a with different tubes, It may be a interesting  experiment to grab a pair of smooth plate Telefunkens from ebay and see if the improvement in sound quality is worth the extra noise. It was for me. In my VTPH-2a, they just did a better job of presenting the music, more soundstage depth, more of a feeling of hands on instruments, truer vocals. Still great dynamics. But a little more noise. 

three-easy, I would expect that different persons would get different results, if each person were to replace the stock tubes with the aftermarket brand you selected, because to a great extent it depends upon the pre-existing condition of the tubes being replaced.  Could it be that your stock tubes were a bit long in the tooth?