Greetings, I'm seeking information regarding the sonic performance of the "New" JJ Tesla, Black Sable 12AX7 tubes, especially if you are using them in a McIntosh C2200 or C2300 preamp.
Agree with Undertow on the new manufacture TungSol 12AX7s. Great tubes. Also their EL34s are what I am running in my Marshall Plexi 100W head and these provide that classic sound.
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