WTLX ("FM 100.5 ESPN") is a radio station serving the Madison, Wisconsin area. The station is owned by Good Karma Broadcasting, LLC, and runs a Sports Talk format.The station began with an Adult Contemporary format as WYKY, "Key 100.5", then for several years aired a "hot talk" format as "100X,"[1], with a schedule including the Howard Stern and Don & Mike shows and sports programming from Sporting News Radio and later Fox Sports Radio.