Primaluna - Rolling pre tubes question...

Mechans ;
Yes , Psvane does make a TII 12AU7 . But I have not found been able to find out much about them .

I never invested in a pair of the fancy recent treasure or Psvane tubes believing that they were marketing ploy for Shuguang or Sino brand tubes in a pretty bottle. I had liked the Sino 12AX7 9C version. I think that is it -it is so long since I had used them. They made them and then stopped and just make the 12AX7 8 B. Beats me but I see that Uncle Kevin (Upscale) has made a few comments, I would trust him as I had advised right away.

I've had great luck with ciftes in my prologue 3. The ciftes seemed to extend or clean up the top a bit and added what my wife and I could only describe as 'velvet' to the sound. Mind the break in time though, I have had the same experience noted earlier in this thread. I've found I need 100+++ hours before even starting judgment for either new or NOS. Broken in PL tubes sounded way better than NOS...for a while.

Thanks Kevin for the update. Mine isn't near broke in but so far I like the sound with the stock tubes. I ordered KT120s when Kevin shipped the amp but haven't rolled them yet.

My experience with Black Treasures versus standard Sino tubes is that the Black Treasures have more body to the sound - richer, more detailed