KTTH

The station signed on in 1925 (1925).[3] For most of its early history, it was a daytimer station, required to go off the air at sunset. Its original call sign was KTCL. From 1927 to 1986, it used the call letters KXA. During the 1960s and 70s, KXA had a classical music format. It competed with KING-FM 98.1 and KUOW-FM 94.9, which both aired classical music on the FM dial.

As FM became more popular for listening to classical music, on October 1, 1980, the station changed to an oldies format and was known as "Old Gold 77 KXA".[4][5]

Following a bankruptcy filing, the station switched from oldies to brokered Christian radio programming in 1983.[6] The station's license was transferred to new owners that same year, and on October 8, 1984, a format called "love songs" began, which was essentially a return to oldies.[7][8]

In 1986, following a sale to Highsmith Broadcasting, the station flipped to a simulcast of country music station KRPM-FM (now KBKS-FM) and changed its call letters to KRPM.[9][10] In 1991, the station changed call letters to KULL, returning again to oldies.[11] Country music returned in January 1995, as did the simulcast with KRPM.

In November 1995, a format swap was made with AM 1090, with 770 receiving the call letters KNWX and an all-news radio format, using programming from CNN Headline News. That was followed by a switch to business talk programming in 1998.

KTTH acquired its current call letters in 2003, along with a flip to conservative talk. KNWX moved to 1210 AM that same year and continued until 2004, when it was renamed KWMG (now KMIA).[12]

KTTH was the last flagship radio station of the Seattle SuperSonics (now Oklahoma City Thunder) of the National Basketball Association, from 2006 to 2008. The station serves as a backup station to KIRO for Seattle Mariners and Washington State Cougars play-by-play when the Seahawks are playing at the same time. It also carries Seattle University men's basketball coverage.