Re: C4 Pro, SC1 Advanced Garmin V
I reached out to both Sena and Schuberth to see if they had any suggestions. Sena didn't really have much to offer, other than a suggestion to delete all pairings and basically try again. Schuberth was a little more substantial, they had some thoughts on the GPS: lower the volume on the unit which apparently can only be done when the unit is off the bike. I looked for a volume control but didn't find one, so now I'll try again with the Garmin removed. They also blamed the volume issue with XM radio with the BMW bluetooth setup which apparently is proprietary, so nothing to try there and no fix coming anytime soon. Full response follows:
Thank you for your support of the SCHUBERTH brand and for taking the time to contact us. I’m sorry for the delayed reply, but I wanted to check in with the main office in Germany to see if they have had similar complaints and/or if they have come up with any solutions.
For the GARMIN, you can adjust the master output volume on the device, and you can go a step further and set the output volume levels for different functions, such as directions, calls, music, etc. You may need to remove the unit from the bike to do this. We suggest setting the output volume to 50-60%, but you can fine tune it on your own from there.
The SC1 should remember the previous volume setting for each device that it is paired to, but for some reason, the BMW Bluetooth Audio Platform causes trouble. The system is proprietary and prefers to work with BMW branded headsets, so it may be a compatibility issue. It isn’t common, but I’ve had one other similar complaint here, and the main office in Germany has no solution. The SC1 is a “generic” headset that may or may not work fully with any manufacturer’s on-board Bluetooth. We have a different set of issues working with Harley Davidson for example, and it is again related to the bike’s proprietary software.
I hope that we can resolve at least one of your concerns. Please let us know if you have any other questions or concerns.