A forefather of turntablism was DJ Kool Herc, an immigrant from Jamaica to New York City. He introduced turntable techniques from Jamaican dub music, while developing new techniques made possible by the direct-drive turntable technology of the Technics SL-1100, which he used for the first sound system he set up after emigrating to New York. The signature technique he developed was playing two copies of the same record on two turntables in alternation to extend the b-dancers' favorite section, switching back and forth between the two to loop the breaks to a rhythmic beat.