And there you have it. 2300 forum members, and this thread is going to sink like a stone.
I do not believe that the Bose system (which I have) has any volume limitation that explains the inaudible nav guidance. Indeed, part of my irreproducible work around involves cranking the Sirius to the max, and at that point there is plenty of volume.
I tried yesterday to generate volume, and I couldn't even get access to the navigation volume that does up to 11 - it stubbornly remained grayed out. Just left me pissed off.
I did find a Word file in which I saved a couple of different posts, describing my irreproducible work around. Here are the contents:
"If I go into tuner, I peg the volume for Sirius. Then I go to source and select Bluetooth. There seem to be some songs, coming from somewhere, ready to play, but they are not playing, and I don't want them to play. Now, If I work my way through the menus to the erstwhile grayed out volume choices, nav voice volume and Bluetooth are active. I go into each of those and max them out (11/11 and 6/6 respectively). At this point, a loud, adjustable Nav voice is produced.
Lastly, I suspect that this is something that benefits from storing the key fob settings.
I have to go into Sirius and split my ear drums maxing out the volume, got to source and switch to blue tooth, and I get the volume back. This is a PITA.
I can also go to source, select Blue Tooth, and max out the volume in Blue Tooth. And even though some song is identified and seems to be trying to play, it is not - no music comes out, but the volume is maxed. Then, I've got volume in the nav voice."