Many members of the Sounds of Concord are also active in quartets that perform in the local area. Some of these quartets participate in regional barbershop singing competitions as well. Our quartets include:

• Back In Town
• Blackstone Valley Quartet (2006 3rd place medalists, Northeastern District)
• Boston Wailers
• Concord eXpress (2005 4th place medalists, Northeastern District)
• Destiny!
• Have Voices Will Travel
• Men In Black (2005 International Collegiate Quartet Champions, 2005 Northeastern District Champions, 2006-2007 International Quartet Semi-Finalists
• Northern Comfort
• The River City All Stars
• The Scottsmen