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Reporting question for Vacuum Tube - 12AX7, Tung-Sol Reissue

Product:
Vacuum Tube - 12AX7, Tung-Sol Reissue

Question:
So I have a couple of Presonus Studio Channel Mic Preamps and A DBX 376 and a one of those Eurotech dual ch. mic pres. I've heard that the Presonus Tube Ch.s can benefit from replacing the tubes. Are these good for my application?

Answer:
Please see our article on 12AX7's. https://www.amplifiedparts.com/tech_corner/12ax7_comparison_of_current_made_tubes It will rate tubes by gain and noise.