In winter of 1948, the magazine published by Radio Terrassa addressed to its members echoed the activity started months before by the radio theater section of the station, which under the direction of Joan Llenas had begun to perform different radio plays.

Terrassa theater Chronicle of1951,  November 3th told about  'Don Juan Tenorio' show that Compañia Titular de Comedias de Radio Terrassa played at Teatre Principal of the town.

At the earliers 50s, Radio Theater was already a consolidated space in Ràdio Terrassa programming schedule. In 1952, it was broadcast on a fortnightly basis, and later it would go on to do so weekly.

In 1952, with the Radioteatro already consolidated in Radio Terrassa, and coinciding with the sixth anniversary of the creation of  Compañía Titular de Comedias, the station convened a survey so that listeners could decide the works they wanted to hear performed on the radio. The five most voted works were chosen, which were broadcast daily between June 30 and July 4; and among the participants in the survey, different gifts donated by businesses in the city were raffled off.

In 1952, on August, September and October editions of Club de Radio Terrassa magazine for its partners, Francesc Izquierdo wrote a three parts serie targeting to readers encouraging they to create radio theater scripts.

In the 50s, it was common for many famous people to visit Ràdio Terrassa. One of these visits was that of the writer, screenwriter and actress Cecília A. Màntua, who in 1954, July, 7th visited the station and participated in the broadcast of her most popular work, '' La Pepa Maca '', playing the main role alongside the actors of Compañia Titular de Comedias. Màntua left written testimony in the Guest Book.