wlac operates at 1510 khz on the am dial, and is simulcast on 98.3 and wsix-fm hd2. wlac's is the only 50,000-watt, class a station in north america which operates on 1510 am, sharing the frequency with 50,000 watt class b station wmex, boston. wmex and wlac mutually protect each other's nighttime coverage.