Anyone heard a difference with upgraded tube in Peachtree products?

Although my Peachtree preamp tube looks quite cool when glowing, switching tube on/off offers no audible difference. My Zu speakers are quite revealing. Just curious if anyone has ever installed a higher end tube and actually heard a difference?

 

What's the tube type? What brand is in there now?

 

I believe the stock tube is an Electro harmonix (rebadged Russian) 6922. One person on an older forum, maybe he was blowing smoke, stated he replace with a 1960's NOS GE version and was blown away by sonic difference. I find that hard to believe...but maybe he's right.

 

My Maverick D1 DAC has a NOS GE 5670, it is quite nice

 

If the NOS were not so expensive, it would be fun to roll some in this thing

 

This site was recommended to me by a fellow forum member, pretty cool, maybe some options for you
https://www.tubeworld.com/index_high.htm

 

My friend had a Peachtree preamp and blind folded I thought I could tell the difference but I could never reliably tell if the tube was in or out. Total joke. Toob buffers are a gimmick. Don't waste your money on a better tube. If you yourself also cannot tell the tube is there, a better tube won't just magically show up. Tube rolling is for fine tuning or polishing the sound....which is the same sound in this case.

 

The Peachtree amps that I know use a Russian 6N1P. I had a Decco in my second system, never really warmed to the sound, sold it cheap to a friend. If I had one I would try the excellent "super-cryo" tube 6N1P from cryoset.com

 

I have a Peachtree NovaPre and I cannot tell any difference when the tube is on or off. I am not sure if a different tube would change that.
It would be great to hear from somebody at Peachtree and see what they had to say about this topic.