Before becoming top 40 KSAS had the KARO call letters which now belong to a Christian worship music station in Boise. In the mid-1990s, KARO was an all '70s music format as Arrow 103 until 1997 when KARO switched to an AOR rock format, competing between classic rock KKGL, then Active Rock J105 and alternative leaning KQXR. Going back to the station's beginnings as KQZQ, they originally aired an automated adult Top 40 format (TM Production's "Stereo Rock" format) as Z-103.
