Bose had been making speakers for over 40 years.
I would imagine Bose has a very strict quality control program set in their manufacuturing facility. Its not to often you know somone who owns Bose products talk about them being defective. The problem with Bose is that their business model relies on investing heavily into advertising, something they have mastered and have been very succesful with, rather than focusing on product development. I am sure Bose has some very talented engineers on their payroll, I wonder what they do all day?