It's not always easy to get information about the headphone industry. Feel free to use this thread to post informative articles, market research, etc. I'll post some links here.
- Here's an article on trends from Dealerscope.
- NPD Group on premium headphones.
- NPD Group on celebrity endorsements (Tyll mentioned this in a piece at InnerFidelity.com.)
- HiFi retailers focusing more on headphones.
- Beats and Monster breakup article. Contains some interesting data.