 In 1972, WBAP also flipped to country music, stealing listeners from KBOX.In 1973, the Arbitron markets for Dallas and Fort Worth were combined into one book, to reflect the merging of the two cities into one metropolitan area as the "Dallas-Fort Worth Metroplex".KBOX, broadcasting at 5,000 watts by day and 500 watts at night, was hurt by this redefinition.