I just finished installing a Garmin 2730 Street Pilot and the Baehr K1200 intercom system on a 05’ K1200. The 2730 is wired directly to the battery and grounded there. The Baehr is installed as per its instructions. When I run the stock components, i.e. CD player and radio, through the Baehr, everything sounds wonderful. When I connect the stereo output of the 2730 to the Baehr intercom system I can hear faint ignition noise coming from the left channel speakers of the Baehr system. If anyone has experienced this problem or knows how to solve it, feel free to offer your thoughts. Thanks for the help.