The best AND quietest us Telefunfen 12Ax7 smooth plate. I tried philips,mullard,rca,ge,brimar,torvac,mazda,amperex(german,american and dutch).There may be a few that I forgot to mention.The telefunken is also silent in a pre-preamp.Do not substitue a 12Ax7 with a 12AT7 or 12AU7.The gain charecteristics are different and might cause the phono section to ascillate.
Whats the best and quietest 12AX7 tube
I get tube rush at 12 oclock from my new Rogue 99 preamp phono stage.The input tubes in it now are sovteks.What 12AX7 is very quiet and microphonic free? THANKS!