I prefer NOS 45 tubes for my 45 SET mono blocks. I have a few pair of National Union tubes which always sound lovely. I also have a couple of pairs of Philcos that I haven't used.
I haven't tried EML or Sophia because the NOS tubes sound great, are still fairly available (bottles, not globes) and NOS is still relatively inexpensive if you shop around. I simply refuse to pay the prices asked for new triode power tubes. It's a hobby, not an addiction.
I haven't tried EML or Sophia because the NOS tubes sound great, are still fairly available (bottles, not globes) and NOS is still relatively inexpensive if you shop around. I simply refuse to pay the prices asked for new triode power tubes. It's a hobby, not an addiction.