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Questions about tubes and gear that glows. FAQ

RE: Which tube position has most influence on sound,12AU7, 12AX7, or KT88?

What kind of amp are you talking push pull or single ended? In single ended the power tube being the last link in the chain has a great effect. That is not to say that the driver or signal tube has a significant effect. But if you have an amp where you can switch power tubes you will hear the greatest sonic difference with the power tubes. In my single ended pentode amp that allows me to use 6l6, kt66, el37, 6550, el34, etc. It is very obvious that the different power tubes have a greater sonic effect than the driver tube. This amp can also switch the 6sl7 or 6sn7 driver tubes and changing all the different input brands of input tubes has a lesser sonic impact than the power tubes. cheers, Dak


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