Acoustix, After 6, Alakazam, Allnighters, As You Like It, Attaboys Quartet

B Sharps Barbershop Quartet, B.O.B., Back Fourty, Barcode Quartet, Barreltones, Bay Rum Runners, Bluegrass Student Union, Boston Common, Bovines, Bravo!

Cabaret!, Catalyst, Checkmate, Cheers!, Chicago News, Chicago Style, Chicken Chips, CHIPS, Chord Flakes, Circa 1904

A Dapper Dans Tribute, DalTon Bros., Dandy Four Vocal Quartet, Das Rheingold, Dealer's Choice, Doc-Siders, Downstate Express, Dreamweavers, Dynamics, The Ditchfield Family Singers and My 3 Sons Quarte

Eastonaires, Excalibur, Expanded Sound

4 Crying Out Loud, 4 Hearts of Harmony, Fastrac Barbershop Quartet, Favorite Sons, First Class, Flipside, Four Cryin' Out Loud!, Four Roses, Four Voices, FourSight Quartet

Gas House Gang, Gee Whiz, Generations, Gentlemen's Agreement, Golden Staters, Golden Touch, Good News, Good Times Barbershop Quartet, Gotcha!, GQ4

Happiness Emporium, Harmonious Rex, Harmony Square, Harmonyworks, Hega Rakbalsam, Heritage Station, High Cotton, Hook, Line, and Sinker, Hot Shots, Hourglass

I-44 Four, Impulse, Inclination - a Toronto Barbershop Quartet, InDEciSIon, Inferno, Innsiders, Interstate Rivals, It's Not Our Fault, The Ivy League

Acoustix, Bluegrass Student Union, Boston Common, Chicago News, Classic Collection, Dealer's Choice, Four Voices, FRED, Gas House Gang, Gentlemen's Agreement

Jambalaya, Jazz Time!, Johnson Hall Barbershop Quartet, Joker's Wild, Jubilee Quartet, The Jubilation Quartet

Keepsake, Key of Eh?, Keystone, Kindred Spirit

Laugaras Quartet, Loose Change, Love@home

Management, Marquis, McKenzie Touring Co, Mellow Fellows Quartet, Metropolis, MetroTones, Michigan Jake, Midnite Watchmen, Minor Adjustments, Mirage

Never Home 4, NeXus Quartet, Night Shift, Nightlife, Nightwatch, Noise Boys, Northern Lights, Northland Gold, The New Generation, The New Tradition

On Q Barbershop Quartet, One-A-Chord A Cappella Quartet, Oriole Four, Outreach Quartet, Outshyne, Overdrive

Pacific Park Serenade, Pacific Standard Time, Patchwork, PLATINUM, PoleCats, Power Play, Premeditated Harmony, Prime Cut, Prime Time, Primer Chords

Q, Quite By Accident

Ragtag Coalition, Rapscallions, Rave Review!, Razzmatazz Barbershop Quartet, Red-Hot Rutabegas, Regents, Reprise Barbershop Quartet, Resound, Revised Edition, Revival

66 West, Salty Dogs, Sandhill Sounds, Saturday Evening Post, Second Edition, Shore Points, Side Street Ramblers, SnapShot, Songbirds, Sound Crew

A Touch of Class, Tagtime, TakeCharge Quartet, Top Deck, Top Drawer Four, TopCats Barbershop Quartet, Tortilla Flats, Trademark, Trebled Spirits Barbershop Quartet, Troubadours

Uncalled Four, Under New Management, Unlimited, Uptown Sound

Vintage Music Company, Virginia Ham, Vocal Edition, Vocal Spectrum Quartet, Voiceterous

Wave, Western Maryland Connection, WIBS - Wisby Barbershop, Winning Combination, Wired For Sound, Wiseguys, Witness

Yesteryear