The Blenders are an American a cappella quartet based in Minneapolis, Minnesota. Known for their distinctive vocal harmonies, the group's style blends elements of pop, jazz, and R&B. Founded in 1988 by Tim Kasper, Ryan Lance, Darren Rust, and Allan Rust, the group has had a significant impact on the a cappella genre, winning numerous vocal music awards. Their holiday album, "Nog", is particularly influential, showcasing the group's innovative arrangements and vocal techniques.