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In Reply to: RE: SET Power supply in series with output trans posted by used-hifi on October 29, 2016 at 09:32:40
One of the goals for optimum power supply performance is to allow no AC voltage to appear at the cold end of the output transformer. If one could accomplish this - literally zero AC voltage at the output of the supply - it could be safely assumed that the power supply injects no audible characteristics into the amplifier. While this isn't possible in practice due to the nature of the physical world, it is more nearly so with large capacitors than with small.
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This is a slippery slope of simplification. While the lack of AC suggests that the supply will add nothing to the signal the achilles heel of that argument is batteries must be ideal.
The thing that is neglected in this line of thought is that the PS must also complete (or is in parallel to) the audio current loop at which point a whole new can of sonic worms is opened.
dave
I'm not neglecting anything. A zero ohm conductor is transparent, regardless of the audio current loop. Does that make batteries ideal? I don't know. That's a different discussion.
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Buy Chinese. Bury freedom.
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