View Full Version : input impedance??
I have a passive transformer volume control. What is the input impedance of the AMP4 and will it work ok with a passive volume control??
Do you use those fancy Stevens & Billington transformers?
When building AMP4 you can set any input impedance you want (usually 20k or 49k).
I made the experience that a low value passive pot (eg. 10k log) fits best to a high (49K) input of the amp.
Please consider: the source has to be able to drive the load of the pot and
too high resistor values at the amp input can introduce noise.
pretty much... something similar.
probably go with 49K input resistance.
cd player has 100-200 ohm output impedance.
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