This is the standard 12AX7WA made in Russia used in Manley Mic preamps, Voxbox®, and Variable Mu® limiters. 12AX7WA subs for ECC83, 7025, 12AX7EH, or 12AX7LPS. This tube is selected to be quiet and to exhibit low microphonics.
For the specially selected lowest noise version, please order Tube-24, the 12AX7WA #1 GOLD MIC GRADE.