El Observador 107.9 is a radio station based in Buenos Aires, Argentina. It began broadcasting on December 26, 2019, taking over the frequency previously used by Radio Berlin. The station is operated by journalist Luis Majul along with partners Gerardo Werthein and Gabriel Hochbaum.

El Observador features a mix of news and music programming. Its lineup includes well-known Argentine media personalities such as Luis Majul, Esteban Trebucq, Yanina Latorre, Marina Calabro, and others. The station aims to provide a platform where music and news coexist.

The name "El Observador" comes from its association with the renowned Uruguayan newspaper of the same name, which is managed by some of the radio station's partners. El Observador 107.9 represents a new venture in the Buenos Aires radio landscape, combining journalistic content with musical offerings.