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!
david99
Get to upscaleaudio.com best tube site. Talk to Kevin, he is an expert on tubes, and he'll give you honest advice. I bought NOS Mazda's from and they are fab! cheers, Gerrym5
Gedrrym5 gives good advice about Kevin. My experience with Kevin and the (French Mil) Mazda's is excellent as well. If you want the quietest and least expensive new tube, another option is the 12AX7 LP Sovtec. This is the ONLY Sovtec tube I like. It is a remarkable tube and a fraction of the cost of similar sounding NOS tubes. Other choices for an ultimate sounding 12AX7, is the Telefunken smooth plate. Be prepared to pay dearly for Telefunkens, as they are hard to find, and therefore expensive. Tele's are not necessarily the quietest tube around, but noise is more or less important, depending entirely on where it is used in a circuit. For instance, a Telefunken that would not be acceptable as a first stage gain tube in a phono circuit, could be the best tube available in a power supply, even if the noise numbers were not the best among the tubes you are testing.
The 12ax7s I am useing ARE Sovtek LPS which Albert recommended.Should I just forget upgrading.I called Kevin Deal,he said no guarentee his QUIETEST tube would lower the tube rush anymore. WHAT TO DO GUYS? IM fairly new to tubes so please advise. Thanfs Albert,I've read your replys elsewhere your cool!!