John Alec Entwistle (9 October 1944 – 27 June 2002) best known as the bass guitarist for the The Who. His aggressive lead sound influenced rock bass players^[1][2].

Entwistle's lead instrument approach used pentatonic lead lines, and a then-unusual trebly sound created by roundwound RotoSound steel bass strings. He had a collection of over 200 instruments by the time of his death, reflecting the different brands he used over his career: Fender and Rickenbacker basses in the 1960s, Alembic's basses in the 1970s, Warwick in the 1980s, and Status all-graphite basses in the 1990s.