What's the best 6NS7 tube you have tried in your Atma-Sphere MP-3 preamp?
Which 6SN7 tubes have you tried and which one was your favorite?
Also, what's the best place to buy it? Best service and best price?
Although I do not have that amp in all my amps the Sylvania pre 1955 Sylvania Y plate sounds best. 6SN7GTA is pre 1955.
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