What is the best sounding GZ34 / 5AR4 rectifier tube you've ever heard?


Looking for experienced opinions. Is there a holy grail? 

Thanks!

blue_collar_audio_guy

The best 5AR4 is the brown bottom Mullard made in the UK. I had one on a Modwright SWL 9.0 Signature edition Pre amp.

 

 

Matt M

 

Thought I remember reading a rectifier tube /rolling, wasn't that consequencensial to SQ.