the best matching tube for Sonic Frontiers is Sovtek. I have tried the upgraded tubes before.......good improvement in analytics, but lost in bass control......sound too bright.
you may check with the SF website for upgrade kit. SF provide Valvo 6922 for upgrade. Otherwise, Telefunken gold pin will be another alternative for you. I mean reasonably be found.
No need to adjust bias.
you may check with the SF website for upgrade kit. SF provide Valvo 6922 for upgrade. Otherwise, Telefunken gold pin will be another alternative for you. I mean reasonably be found.
No need to adjust bias.