On Fri, 26 Dec 2003 20:58:44 +0100, Stig Erik Tangen
wrote:

1 uF into 10kOhms load equals approx 16 Hz -3 dB. 1 uF or more should work.

Unfortunately this gives about 2 kOhm load to an induced current of
60 Hz. So there is some chance for hum.

What about checking the voltage across the current capacitor and if it
is some tens of millivolt the capacitor is not needed at all - unless
the power amp is fully DC coupled?

Norbert