Sonically, what's the difference between the metal-base and non metal-base 5AR4/GZ34 rectifier tubes, Philips/Amperex or Mullard? Especially as they perform in the Modwright 9.0 SE preamp?
You weren't kidding about the metal base GZ34 tubes. Pricing started around $300 all the way up to $799 for a single tube. I'll pass on those metal base GZ34s. They cost more than the SET amp I got. Those Mullard GZ34 re-issues look like quite the bargain compared to those metal base GZ34 tubes I saw. Thanks for chiming in.
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