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  1. E

    Studio Preamp retubing?

    I just picked up a used Studio Preamp that is in good shape although it looks (and sounds) to have the original or at least very old tubes in it so I am going to retube it. Currently it has the following 5 tubes installed in it: 12AT7 SPAX7 12AX7 12AX7 12AX7 I primarily play heavy rock &...
    • eio
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    • Replies: 0
    • Forum: Tubes
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