WDBC (680 AM, "The Information Authority") is a radio station licensed to Escanaba, Michigan broadcasting a full-service format featuring news, talk and adult standards music.WDBC is Upper Michigan's most powerful AM radio station in terms of signal strength; its 10,000-watt daytime signal can be heard from Iron River in the west to St. Ignace in the east, and as far away as Green Bay, Wisconsin and Manistee, Michigan.WDBC has broadcast a variety of popular music formats over the years.