[2] KMCK has an effective radiated power (ERP) of 100,000 watts, the maximum for non-grandfathered FM stations.

It signed on the air in 1947, as KUOA-FM, owned by John Brown University in Siloam Springs, Arkansas.

The station was previously known as "Night Flight 106" and later "K106" in 1981, running a Top 40 format.

In the mid-1980s, the station’s format was updated to hot adult contemporary.

The station returned back to its Top 40 format on July 30, 1989.