Tubes Asylum Questions about tubes and gear that glows. FAQ

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RE: New production 6L6/KT66?

Posted by Triode_Kingdom (A) on March 20, 2015 at 13:19:19

In Reply to: RE: New production 6L6/KT66? posted by classfolkphile on March 20, 2015 at 09:05:28:

In addition to feedback and bias, many amplifiers use frequency compensation networks that need to be tweaked when tubes are changed. This all means that the audible effects of tube rolling are really only appropriate for the specific amplifier used to test them. It's not fair to say that this tube or that has better bass, better mids, more air, etc. in a general sense unless each was tested in an optimized environment. Further, it's very possible to overlook the tubes that are actually a best fit if the amplifier isn't retuned for each type. That's the real shame when someone performs tube rolling without test gear. Of course, in the end, tube rolling is about finding the sound you like best. There's still a potential benefit, measurements or not. :)

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