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Amp/Preamp Asylum: " Solid state devices are not as linear as tubes..., so a feedback circuit is required" by 1973shovel

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" Solid state devices are not as linear as tubes..., so a feedback circuit is required"

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Just so I'm clear, are you saying that all solid state amps use feedback? As an F1 owner, I'm sure you're aware that mister Pass says it uses no feedback. (see his quote below) Whether that's truly unique to this SS amp only, I don't know.

What I do know is that my First Watt F1 (since updated to F1J by First Watt) is the best sounding amp that I own. I kinda felt like a traitor to tubes at first, but I quickly got over that. Note that I've always had push-pull tube amps though, never a SET.


"If being a current source amplifier isn't different enough, the F1 is special in other ways. It uses no feedback to reduce distortion, flatten frequency response or create a low output impedance, and it ignores the voltages that appear across the speaker terminals." Nelson Pass, from his F1 power amplifier paper.


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Topic - What Makes SET Amps Tick? - PaulF70 18:19:22 05/16/25 ( 101)