Report Review for product Vacuum Tube - 12AX7 / ECC83, Electro-Harmonix

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I start a copy of an EC3 audio research crossover who needs 12 12AX7. During the testing phase i use some cheap and classical EH. Then I tested with my NOS AN GE of 1960 inherited from an old radar repair and kept in a safe ... No significant difference, except perhaps in the dispersion of the characteristics.
Thanks a lot for the quick service.

Frenchy - July 22nd, 2018