Would an amp need to be rebiased if the stock Sovtek 5AR4/GZ34 was replaced with a NOS Mullard or Amperex? or are the tubes interchangeable?
Originally posted by redjet55
the rectifier does not need any bias adjustment. But youre also not likely to hear a great deal of difference between rectifier tubes.
Longevity is the real advantage nos over new build, a nos tube would likely outlast the amp.