I put some new ones in I ordered from England. I was doing some other things to it at the time so too much time elapsed to be sure but I thought it might have sounded a little better; I don't think it makes the big difference that all tube units see when switching tubes. I would not expect startling differences. Mine were NOS, I want to say Silvania but I could be wrong. Not RCA, although I looked at them also.
Tube rolling for Musical Fidelity Nuvista M3?
Has anyone tried tube rolling the 6CW4's tubes in the pre section of their Nuvista M3? The tubes are very inexpensive so I'm hoping somebody can share their tube rolling experiences with this unit.
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