Of all the 12AX7 tubes we have tested here at Tejas Tubes, these amazing CV492 smooth plate tubes made in pre-war Yugoslovia have tested with some of the highest umos levels we have seen! These were also used as original equipment in the Audio Research

SP-6/8. Here is what one of our customers have said about these powerful tubes:

" These tubes kick butt!  A huge upgrade for the Behringer 1953 microphone pre-amp!"   Brian Puglisi  

If you are an audiofile or musician, you owe it to yourself to pick up a couple of these NOS tubes! Tejas Tubes has one of the largest known supplies left in the world of these amazing tubes, so we can offer unprecedented matching and noise testing!

Recommended by

Dr. Z for all of his amps! 

Original equipment for Audio Research SP-6/8.

Just $79.99 per tube!

Balanced Triodes

Just $89.99 per tube!