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In Reply to: RE: 12AX7 (ECC83) vs 12AU7 (ECC 82) posted by jaynemo on April 13, 2008 at 07:38:36
Switching between a 12AU7 and 12AX7 in a phono stage will throw off the RIAA equalization. I would stick with what was supplied (probably 12AX7's).
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