Sovtek tubes are produced in Russia and are known worldwide as one of the best brands on the market. The Sovtek 12AX7WA is renowned for its warm and enveloping tone. This nearly non-microphonic tube is used by brands such as Fender, Ampeg, Hartke, ...

Sovtek valves are produced in Russia and are renowned worldwide as one of the best brands on the market. The Sovtek 12AX7WB has higher gain compared to the 12AX7A model and is used, among others, in amplifiers from brands such as Rivera, VHT, Demeter, ...