In addition to a standard analog transmission, WCLK broadcasts over two HD Radio digital subchannels,[4] and is available online.

Over time, its power and antenna height were upgraded, giving the station a signal that covers all of Atlanta and its adjacent suburbs.

WCLK was granted a Federal Communications Commission construction permit in early 2009 to downgrade its effective radiated power (ERP) from 6,000 watts to 480 watts, but its antenna height above average terrain was more than tripled, going to 991 feet from 308 feet, so its overall coverage area remained the same as before.

When WABE switched to news and talk for most of the day starting in 2014, WCLK dropped the NPR talk shows to air a schedule of mostly jazz music and related genres, but remains affiliated with NPR for some news and jazz programming.

The color photograph by Seve "Obasina" Adigun and Gregory Turner, taken in April 2007, mirrors the iconic, classic, black-and-white image, A Great Day in Harlem 1958 by Art Kane.