I've got some info on Hyannis Sound. Here's a brief bio:

Hyannis Sound is an all-male a cappella group based in Hyannis, Massachusetts. The group was formed in 1994 and has since become one of the most popular and enduring a cappella groups in the US. With a repertoire that spans pop, rock, and R&B, Hyannis Sound has built a reputation for their tight harmonies, energetic live performances, and creative arrangements of both classic and contemporary songs.

Over the years, the group has released numerous albums and EPs, featuring a mix of original compositions and clever covers of songs by artists like Bon Jovi, Coldplay, and Steve Winwood (as evidenced by their recent releases, including "Livin' on a Prayer" and "Higher Love"). With their unique sound and charismatic stage presence, Hyannis Sound has developed a loyal following among a cappella fans and music enthusiasts alike.