New to your forum. If this is resolved issue I apologize. Just guide me to fix.
If not, my Cinemate 10,s volume will stay at correct volume, for a little while, then the volume drops down in half, or more for so many seconds and rebounds back to normal. This consistently happens when using.
Sorry, no known fix. Bose gear needs to be serviced by Bose technicians. Bose does not issue service manuals to outside service centers. While there are some bootlegged manuals on line, if you don't have the tools to troubleshoot this problem on your own, you don't have the tools to repair the unit.
Ask for an estimate of repair costs before giving the approval for any repairs to occur.