Extremely consistent and reliable tetrode built to strict military standards. The 5881WXT will tolerate higher voltages than most 6L6s. It is frequently used as a replacement for the old 7027s in vintage Ampegs.
The Sovtek 5881WXT is the same as the 5881 but with a full size base for easy installation in classic amps. The Sovtek 5881 offers a warm, round tone that "sweetens" any modern guitar amp or vintage design.