4O6--pronounced four-oh-six--is the competitive sub-group of Bradley University's Dynamix A Cappella club. They are a co-ed, student-run group that performs throughout their home campus and the greater Peoria area, singing a variety of genres including pop, rock, jazz, and a cappella classics. Their 11 members range from music majors to first-time performers. This will be their first time competing in an a cappella competition, as their group was just recently formed last year, though you might recognize them from their guest performance at the 2025 Harmony Sweepstakes competition. 4O6 is thrilled to be back, and they wish all the competing groups the best of luck.

Members: Mars Heath, Grace Leonard, Olivia Williams, Kaitlyn Bell, Audrey Drake, Diamanda Vavilis, Shelcy Altis, Bruce Smolucha, Christopher Leatherwood, Casper Chhe, Sean Crawford