I have pretty much finished installing an intercom system on my SEEG and thought I would share the results. I have tried just about every communication & audio management system made at one time or another. In my opinion the only 2 products that are even worth looking at are the products from Autocom and Baehr. The rest including the H/D system on the Ultra, (again in my opinion only), are garbage. Unfortunately both the mentioned products are expensive especially when you pick the top level of their offerings. I found the Autocom Pro M1 to be very effective with closed faced helmets but not as good as the Baehr Ultima with open faced helmets so I ended up using the Baehr on the SEEG.
The Baehr has 4 audio & 1 radio (bike to bike) inputs in addition to the rider & passenger intercom. I have a Cell Phone, GPS, MP3 Player, Radar Detector, and the H/D stock radio connected to the inputs. I don