Raul Wertt received the concession for XHRW-FM in 1974 and putthe station on the air in 1975. The original concession specified operation on 99.3 MHz with an ERP of three kilowatts. The station was known as Stereo 99 with a pop format before became Estéreo Ritmo in 1982. In 1990, the station moved to 97.7 MHz, rebranding as Super Stereo 98 in 1997. In 2001, the station changed its name, continuing in the pop format, to Arroba 97.7. In 2005, the Los 40 Principales format that had been broadcast on XHHF-FM96.9 moved to XHRW-FM.