Don Pearce wrote:



Maybe, ok, in both cases there will be a DC voltage, but there will also
be the signal voltage of the magnitude we are talking about.


Are you sure? In normal use the signal across a capacitor is very
close to zero. The scenario he has presented is one which simply
doesn't exist in an audio circuit.

Are you perhaps confusing signal level at a point in the circuit with
potential difference across the coupling cap at that point?

d


Ahh, I see the point you are making, as you say, the other side would
need to grounded for the voltage to be across the cap.

Well, I am happy to admit when I am wrong.

--
Nick