How large (or small) is the audiophile market?

Shrinking every year.

Just to be clear, I am interested in the number of audiophile consumers, not the dollar valuation of the market.

The definition of audiophile is not a simple task...

 This concept is multidimensional:  I consider myself an audiophile but my purchase are made at peanuts costs... Am i an audiophile ?

I am not an audiophile if we use some criteria related to price and upgrades sum...

@jtucker very small.

Apple's dongle revenue in a year can be used to pay for every company not already owned by Bose, Samsung

I am interested in the number of audiophile consumers

that's what I wrote, if everyone buys a new speaker every 10 years, maybe 10 million people +-30%