This is getting off topic, my final comment.
If fake transistors predominate just the audio world, it does beg the question, why??
Vacuum tubes for instance , they look for the brand name, the colour of the getter, the gold plated pins.
We look for heater? to Cathode voltage, Gm, Mu, plate dissipation and grid bias. Transistors we look at HFe, SOA, Ft, Vsat, among others, not the colour, the hype or the "sound" or whether its recommended by some audio expert down the road, we care not about such things.
Do you seriously expect me to give a "list" of my suppliers, this would take hundreds of pages.
As I have said, only VERY occasionally you "may" have a problem, in which case, if suspicious, or suspect, simply MEASURE the component parameters first ,thats what? competant techs do. There is no excuse for fitting suspect parts , or substitute parts without..... potentially damaging the equipment under repair.
