Driver/Input tubes

I need somebody to either explain or steer me to an explanation of the 12AX7/12AT7 tube's purpose in my Jolida JD502P power amp. I get preamp tubes in a preamp, but I've found it difficult to find a clear explanation of what the "driver" and "input" tubes are actually doing, and their relative importance to the sound of the amp. The 502P seems to have a typical compliment of these tubes, sharing its basic design with a lot of apparently similar power amps. Brain trust...hep me...hep me...
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Showing 1 response by casey621

I need some spare 12ax7s and 12at7s for my jolida 3502s. I have the mullard 6201 gold pins and the russian Gold Lion 12ax7s from Upscale. Are the new mullards ok? Thanks Ted