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Re: OT: feedback resistors in PAs

Jacques, I think that I would rescale the resistors to be a higher value. Power amps are at the end of the amplifiying chain and the difference between a 100 ohm resistor and a 1K resistor would usually be unimportant. At a moving coil input stage, however, even 100 ohms would be too much, but then there is no signal output either.
For my power amps, I generally use a 47K 1/2W Holco (old) feedback resistor with perhaps 1.8K to ground. I might use a 1-2W Resista, if I had to sacale it down to 10K and 330 ohms or so. I would most likely never use a 100 ohm resistor, because of the problem of dynamic overheating, that could be fixed with a heatsinked power resistor, but then you develop other problems such as capacitive coupling to the chassis, etc.

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