Sovtek

The Sovtek brand of military grade vacuum tubes are made in Russia and considered to be among the finest currently available. "S" Spiral filament for no hum with AC heaters.

About the Sovtek 12AX7LPS: "12AX7LP Sovtek tubes...very linear, has great looking curves...large full sound stage, very musical with great detail...smooth and involving" --Charles Kittleson, Editor, Vacuum Tube Valley