KMCK-FM (105.7 FM) is a radio station broadcasting a Top 40 (CHR) format. Licensed to Siloam Springs, Arkansas, USA, the station serves the Fayetteville, Arkansas, area. The station is currently owned by Cumulus Media. "Power 105.7" first signed on as a CHR in 1989. Before that, KMCK was a Hot Adult Contemporary station known as "K106".