Arthur Charles William Haddy OBE (16 May 1906 – 18 December 1989) was an English recording engineer. His work as Technical Director of Decca Records caused him to be nicknamed "the father of hi-fi".
After working in the recording industry in the 1930s, Haddy was employed in wartime projects during the Second World War. These required new, sophisticated sonic developments that Haddy and his colleagues later put to peacetime use in Decca's innovative postwar recording techniques. He was an early proponent of the long-playing record, stereophony, video discs and digital recording.