WCLK FM 91.9 is a radio station licensed to Atlanta, Georgia, USA, and serves the core area of metro Atlanta. It is owned and operated as a public radio station by Clark Atlanta University. WCLK is also broadcast in HD radio.It was granted a construction permit in early 2009 to downgrade its effective radiated power (the maximum in any direction) from 6 kW to 2.5 kW; however, this will change its footprint very little, reducing its range to the north and east by just a few kilometers or miles.