Originally Posted by edbremer
... I have read about the 2820 and understand that the only thing you will get priority out of it on the LT will be mono sound for nav. The MP3 player output is stereo and requires the audio to go out a separate cable and into the AUX port on the VOICE II system. .... I don't know how the LT systems will work out but I have high expectations! Hopefully the intercom will be functional at all times, even when the AUX is the audio source.
The 2820 works in two modes: one if the AUX output, i.e., "stereo" mode (3.5mm plugged into it and the Voice II); the other if no cable is plugged into the 2820, i.e., the "mono" mode (like when you use your iPod plugged into the Voice II). In the first mode, the 2820 sets the priorities for all of the Garmin outputs when using the 2820 Music Player software (whether it be the GXM-30 XM radio, internal music stored on the Garmin unit, and the Audible books). In this mode the Voice II then only modifies the priorities for the GMRS/FRS radio bike to bike input and the telephone inputs. As I recall, the Voice II will trump the Garmin unit if either a GMRS call is in process or a telephone call is received, thus you may miss Garmin audible turn instructions on occasion.
In the second mode, when I use my iPod and plug it into the Voice II, I also disconnect the 3.5mm cable from my 2820. Without the cable plugged into the 2820, the Garmin instuctions are piped through the intercom system via the mono connection of the Navigation prep wiring on the bike. The Garmin instructions then will trump your iPod music. The other Voice II priorities are as I stated above.
When you switch between the Garmin modes, stereo via cable or mono via the Nav prep power cord you may have to adjust the sound output for each of your audio sources (the Garmin, bike radio, iPod, etc) so you don't blast out your ear drums or so you can hear the various audio sources.