The Four Renegades is a

Barbershop quartet A barbershop quartet is a group of four singers who sing music in the barbershop style, characterized by four-part harmony without instrumental accompaniment, or a cappella. The four voices are: the lead, the vocal part which typically carries t ...

that won the 1965

SPEBSQSA The Barbershop Harmony Society, legally and historically named the Society for the Preservation and Encouragement of Barber Shop Quartet Singing in America, Inc. (SPEBSQSA), is the first of several organizations to promote and preserve barbershop ...

international competition.

References

AIC entry
(archived) Barbershop quartets Barbershop Harmony Society {{Barbershop-quartet-stub