Garmin MP3 audio - help

Hi all

I'm on the verge of buying a used Garmin 27xx or 28xx.

Can someone tell me when using the MP3 facility, is it possible to listen to the music through my Autocom via the 3.5mm aux jack, as opposed to the speaker on the Garmin power lead ?

Thanks
Heff

2720 has no music. With 2820 you can , though some early units suffer from a screen-induced hum which is totally absent on the mono output.