Ringmasters is a Swedish barbershop quartet that was founded the fall of 2006. The group consists of Jakob Stenberg (tenor), Rasmus Krigström (lead), Emanuel Roll (baritone) and Martin Wahlgren (bass); who all studied at Adolf Fredrik's school of music and graduated from Stockholm's Music High School. In July 2012 they became International Quartet Champions at the Barbershop Harmony Society's convention in Portland, Oregon, making history as the first non-North-American quartet ever to win the championship.