Audiophiledom is a club. As Groucho Marx said, I refuse to join any club that would have me as a member. Nobody want to be called an audiophile. Go into any record store that sells used records - the owners have one word audiophilenut. They don't bother to separate it into two.
Seriously..."a person who is especially interested in high-fidelity sound reproduction". It can be any system or no system.