Mach 4 formed in late 2021 and had a busy 2022. They have performed at the Yarmouth Clam Festival, sung the National Anthem at Hadlock Field for the Portland Sea Dogs, as well as some private events. In October 2022 they represented the Downeasters at the Northeastern District Convention of the Barbershop Harmony Society (BHS) covering all of New England and Eastern Canada, and at that debut contest, they were awarded second place.