The research advice was meant with good intent - on some of the other forum categories, you wouldn't get an answer, just a chastisement from the Forums Nazi (or wannabe's) to use the search tool.
You obviously couldn't be expected to know the failure or you wouldn't have asked the question.
Seriously, there is a ton of info on here and its almost more rewarding to use the search tool to get all the previous info on a problem. Use speaker fail in your search string & see just see what you get. You could also try Bose Repair & see what that brings you.
Good luck with your problem - it's not a tough fix. Again, your search will turn up references to briank - good trusted source to address repair for you.