"John Galban" wrote in message om...
Thomas Borchert wrote in message ...

Are we talking about the Garmin 340 audio panel? That's a known problem
- and there's a work-around and a fic by Garmin. If you're interested
in the details, I'll provide them.

No. I've tried this on Softcomm and Flightcom portable intercoms
and a Flightcom 2 place panel mount. I've also tried using several
audio sources. The only luck I've had is with older devices that were
originally designed to drive a real speaker. It's really looking like
a power (output wattage) issue.

John Galban=====N4BQ (PA28-180)

I think it is an impedance match issue...