For the past 30 years, the name of the internationally acclaimed King Singers has been synonymous with great a capella singing.

But according to bass singer Steve Connolly, 30 years doesn’t even mark the halfway point.

“I could see a King Singers of the future celebrating their 100th anniversary,” Connolly said in his distinctly British accent. “Thirty years is just a marker that shows what the group’s outreach has been.”

Throughout their distinguished reign, the members of the British sextet have changed, but their mission has remained the same — to enlighten audiences with their eclectic concert programs.

Performing everything from 16th century madrigals (part song, without accompaniment), to tailored arrangements of popular hits, the group has attracted audiences from a wide variety of musical backgrounds.

During the course of a concert, Connolly said the singers are apt to perform something various audience members aren’t used to hearing. But variety has never diminished audience attendance.

“People come along ’cause they have trusted us over the years,” Connolly said. “When they come to a two-hour concert, there’s going to be something in there that’s going to really tear them up.”

Connolly noted that every concert holds the possibility for the audience members to embrace a new style of music.

“You’ve done your job when you’ve educated the population that didn’t like certain music before the concert,” Connolly said.

And King Singer concerts draw people from both extremes.

People who have never heard a madrigal end up liking it after seeing a performance, Connolly said, just like when people are amazed when they hear their first rock ‘n’ roll album.

After hearing a pop tune, Connolly said classical music enthusiasts have been known to say something like, “‘I’ve never given Billy Joel the time of day in my life, but that was rather fine. I think I’ll go out and buy a CD.'”

Members of the King Singers haven’t always embraced such a wide variety of musical styles throughout their lives. Connolly said most of the singers come from strong classical music backgrounds.

“[Classical music] is the grounding for our work,” Connolly said. “Most of us have had this choral tradition instilled in us since the age of seven.”

Because they’ve branched out from their classical music backgrounds, the King Singers have earned the opportunity to perform gigs that range from a celebrated concert with the Boston Pops to a hyped-up television appearance on “The Tonight Show.”

The group’s performances keep them busy six to seven months out of the year.

“We have about 110 shows a year, but we try not to be away [from England] for over two weeks at a time,” Connolly said. “We’ve been allowed to go home and wash our dirty laundry.”

The King Singers will bring their song and good cheer to Stephens Auditorium Friday for a 7:30 p.m. performance. Tickets are $12.50, $10 and $7.50 for students and can be purchased at Ticketmaster outlets.