^^^ Actually, several months ago I decided to try the Shuguang 12AX7b silver dragon. I purchased two matched sets for line my stage and phono, requesting extra low noise tubes. I have used them quite a bit, but in my preamp/phono stage they are not as pleasant as the Psvane 12AX7-TII or Mullard old stock. Of course the latter are 5 times the price of the silver dragon. They will come in handy as backup. Did I purchase the wrong Shuguang or are you referring to the same 12AX7b?
Thanks