yesterday I picked up a used Ampeg SVT6 Pro hybrid tube /SS bass amp to get me a little more juice.
Ampeg: Pro Series - SVT-6PRO
This is one of the last Ampeg amps made in the USA and they are getting rare. However due to it's age and who knows how it was used / abused, I think re-tubing it may be in the cards. It needs: 4)12AX7 tubes and 2)12AU7 tubes. I know nothing about tube pre-amps so what brand should I be looking for at the best price? Should they be matched? all that stuff. Educate me please.