John F. Loder (7 April 1946 – 12 August 2005) was an English sound engineer, record producer and founder of Southern Studios, as well as a former member of EXIT and co-founder of the Southern Records distribution company with his wife Sue. He was also the studio engineer of choice for Crass and Crass Records, and was often considered to be the band's "ninth member". When Crass founded their own record label, Loder worked as an engineer on most of the label's releases, and when Loder saw potential in a number of bands turned away by Crass Records, Loder set up Southern Records.