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RE: Preamp build

"My GM70 goes full power with about 1.7v in."

Is that derived from a RMS measurement? If so, you might not need a preamp with gain. All your sources will probably drive the amplifier to full output, particularly when the dynamic range of the program material is taken into account. I came to that conclusion recently for my own preamp project. Although much-maligned by some, the cathode follower is the most linear of all VT topologies. It neatly supports the concept of a unity-gain preamp, and dozens of tube types that would be less suitable in common cathode will work well.




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  • RE: Preamp build - Triode_Kingdom 06:26:47 08/16/17 (1)

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