The Harmon Kardon speakers use a
two prong.
Here's the setup connections:
https://www.google.com/search?biw=17...u-MK58fLu9ONM:
It's odd that it's intermittent, you would
think if it were a capacitor it would happen
all the time.
Well, I guess I'll just live with it
and just power off/on when it happens.
Thanks,
Robert