Thank you for Roger Sanders article, it was very helpful. About the tubes for my amplifier, they are pretty new with not more than 300 hrs( that’s what the previous owner said) but I’m not sure about 12au7, never asked for them.Maybe I have to check them? Regards my solid state, it is Mcintosh MC 2255 with C33 preamp and Nobsound tube phono stage.
I’m listen mostly vinyl records and I have one particular which I use for testing and comparing ( Pretty Maids- “Future World”)
Th’s to all for responds and advises!