Hi, Subscriber, hope you're well. This is a message to the limited list of folk who might be in a position to help on stories. Please ignore if it's not your area. I'm doing a piece on hi-res audio, the market, the players, the technology. I'd be interested in any expertise or industry players who might be or know about the hi-res portable audio market -- high end headphones, in-ear monitors, players, software and hardware components. 

In particular: 

- size of the existing and potential market