The station changed to its long-running country format as KMPS-FM on February 1, 1978, continuing to simulcast its AM sister. Throughout the 1980s, 1990s, and early 2000s, KMPS-FM was the dominant country station in the Seattle area. EZ Communications bought KMPS-AM-FM from Hercules Broadcasting in 1986. EZ sold the AM station to Salem Communications ten years later in 1996. In July 1997, EZ merged with American Radio Systems, with ARS merging with Infinity Broadcasting in September of that year. On February 2, 2017, CBS Radio announced it would merge with Entercom. KMPS would be retained by the new company, making it a sister station to country competitor KKWF as well as KHTP, KISW, and KNDD. To meet ownership limits set by the Federal Communications Commission, sister stationsKFNQ, KJAQ, and KZOK-FM were divested to iHeartMedia. The merger was approved on November 9 and was consummated on November 17. On the same day as the completion of the merger, KMPS-FM switched to all-Christmas music, leading to speculation that the station was planning to change formats after the holiday season. On-air personality Deanna Lee denied that this was the case, and stated that KMPS would remain a country station. However, the rumors would turn out to be true.
KSWD
On December 4, 2017, at 9:12 a.m., KMPS-FM flipped to soft adult contemporary as "94.1 The Sound", launching with "Hello" by Lionel Richie. These changes briefly made KKWF the only country station in Seattle, before KVRQ abruptly flipped to the format later in the morning. The station's call letters were changed to KSWD on December 11, 2017; these calls were previously used by KKLQ, an Entercom station divested during the merger which had also branded itself as "The Sound". The KMPS calls were moved to sister station KRAK in Hesperia, California. On January 16, 2018, John Fisher, former longtime morning host at KMTT, was announced as KSWD's morning host beginning January 22. Ten days later on January 26, it was announced that Seattle resident and nationally syndicated personality Delilah would become the station's midday host beginning January 29. Alongside her daytime program on weekdays, KSWD airs her syndicated program on Friday, Saturday, and Sunday nights. In May 2018, Smokey Rivers was named the station's program director, and began to additionally host afternoons. In October 2018, Jeanne Ashley was named assistant program director and new morning co-host.
HD Radio
KSWD broadcasts in HD Radio with two digital subchannels:
KSWD-HD1 is a digital simulcast of the analog signal.
KSWD-HD2 broadcasts a blues format known as "The Delta".