To the guy above, yeah completely agree with you, if the headset still doesn’t work call Bose...I purchased my headset 8-9 years ago and didn’t realize it was completely under warranty still (Didn’t have any paperwork or anything just provided them serial number over the phone). I was having issues with ear piece and mic and they sent me a refurbished headset free of charge a week later..Their customer service is 5/5 stars unlike a lot of companies
Like I said, try those settings first though...I had a captain at the time that got my headset all sorted out with the settings I mentioned above and it worked on the 170/175. If not try customer service.