The Shure Unidyne 55 microphone has been a favourite of musicians and public speakers since 1939 – from Elvis Presley to Metallica, and from John F. Kennedy to Martin Luther King.

Nicole Kidman’s portrayal of Satine in Baz Luhrmann’s 2001 musical Moulin Rouge! remains one of the most dazzling performances in 21st-century cinema. More than two decades later, her breathtaking ...