Vocal
- 641
- Fusion
- A women's a cappella quartet in the greater Rochester, New York area. Also offers singing Valentines.
- 642
- Showcase
- A female a cappella quartet in the Nashua, New Hampshire area. Provides member profiles, photos, and contact details.
- 644
- A Cappella Pops
- A mixed-voice chorus in the Philadelphia area that sings exciting and unique arrangements of progressive music - mixing the sounds and styles of barbershop, jazz, folk, broadway and gospel.
- 651
- Vocal Spectrum Quartet
- 2006 International Quartet Champions. An a cappella vocal ensemble, who sing in the barbershop style, dedicated to a mission of excellence in a cappella singing.
- 653
- Chorus of the Chesapeake
- 1961 and '71 International Champions from Dundalk, Maryland. Member listing, calendar of events, show announcements and newsletter.
- 654
- Masters of Harmony
- 1990, '93, '96, '99 '02 and '05 International Champions from Santa Fe Springs, California.
- 655
- New Tradition Chorus
- 2001 International Champions and 8-time international silver medalist chorus. Northbrook Illinois chapter of SPEBSQSA.