DJ SS (born Leroy Small, 27 August 1970, Leicester, England) is an English drum and bass DJ and record producer. SS is short for Scratchenstein, which is a name he used when he was a hip hop scratch DJ, and a part of the hip hop act, The Formation Five, whose name inspired the name of his record label. Has two children, Parris and Jordan and is married to wife, Tania who runs the artist management agency, UMC (Underground Music Collective). His siblings include Pam, Melanie and Fitzroy.

Originally a breakdancer, DJ Stratchenstein began playing electro music as a teenager in the early 1980s. He then played hip hop and rare groove before turning to producing in 1988 initially acid house, hardcore, breakbeat and finally drum and bass tracks.