I think JJ's are the new Tesla's.They can be a little bright depending on equipment.The SED "C"logo took over the original Svetlana Made in ST.Petersburg,which is preferred by most audiophiles over the New Sensor Svetlana's.The SED's sound rich and liquidy.Matched Quads should be available in the SED "C" logo,or JJ's .The Cryogenic freezing doesn't have my friends or myself sold.The SED's are also called Winged"C" SED,s. They are both musical for modern tubes also.
Tube el34
Hello, I'm in the process of upgrading my tube on a Conrad-johnson cav-50. I used Electro-Harmonic at the moment. It is possible to by Match Quad of them. Witch el34 out there is the best sounding? Mullard el34? There a process of cryogenic blabla to -300? is it good?
Thank you for your time
peter
Thank you for your time
peter