|Broadcast area||Northwest Arkansas including Fayetteville and Bentonville|
|Format||Top 40 (CHR)|
|KAMO-FM, KFAY, KKEG, KQSM-FM, KRMW, KYNG|
First air date
|1947 (as KUOA-FM Siloam Springs)|
|HAAT||145 meters (476 ft)|
KMCK-FM (105.7 MHz) is a commercial FM radio station broadcasting a Top 40 (CHR) radio format. The station is licensed to Prairie Grove, Arkansas, and serves Northwest Arkansas. It is known as "Power 105.7" and is owned by Cumulus Media.
KMCK has an effective radiated power (ERP) of 100,000 watts, the maximum for non-grandfathered FM stations. The transmitter is off Liberty Avenue in Tontitown, Arkansas. Its signal reaches parts of Arkansas, Oklahoma and Missouri.
It signed on the air in 1947 as KUOA-FM, owned by John Brown University in Siloam Springs, Arkansas. It was originally powered at 2,600 watts, a fraction of its current output.
It switched to Top 40 music in 1989. Before that, KMCK was a Hot Adult Contemporary station known as "K106".