Answer & Explanation :
Reasons of Bose speakers' & products' goodness 
- Excellent Design - Best suitable for major premium 'willing to pay' customers 
 - Supply - Exceptionally capable suppliers 
 - Manufacturing - Updated & superior quality technologies, based on intense research & development 
 
High quality products & services outshine in market for following reasons: 
- The proportionate higher quality is sold at much higher relative price. 
 - These goods become 'ostentation' (status symbol) goods, are bought not only for their increased value, but also for prestige. 
 -  Rejection based repair & rework is minimum. This synergises internal processes & increases cost efficiency. 
 
So, high prices & cost efficiency imply - high profitability for such high quality products.