Tube Amp Doctor 6V6GT-STR Premium Selected Vacuum Tube, Single This all new TAD 6V6GT-STR combines the exceptionally sweet voiced NOS 6V6GT like the RCA or GE 6V6GTY with up to date demand to withstand the higher operating voltages due to raised AC supply. Surprisingly tight bass which you would not expect except with the very best choice of real NOS 6V6GT treasures. TAD recommends the TAD 6V6GT-STR for all 6V6 applications where a powerful but sweet tone is desired. Works great in Single Ended Class A Amps like the Fender -Tweed- Champ, Vibro-Champ, Fender Champion 600 or the Univalve. Also perfect choice for Reverb Driver in Vibrokings and Dual Professionals. Single Tube