The fans of hi-fi are known as audiophiles or videophiles[?].
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Also title of a book by Nick Hornby about an audiophile and his relationships.
... Amyloidosis[?] Amylopectinosis[?] Amyoplasia mandibulofacial dysostosis[?] Amyoplasia[?] Amyotonia congenita[?] Amyotrophic lateral sclerosis ...