DWRX (93.1 FM), broadcasting as Monster RX 93.1, is a radio station owned and operated by Audiovisual Communicators, Inc.

In 1983, the station was sold to Audiovisual Communicators, which was then led by Rene Lacson and Freddie Garcia, and changed its call letters to DWRX, RX referring to "prescription music".

In 1987, the station transferred from its studio and offices in Makati to its current location in Ortigas and switched to an easy listening format under the brand Light Rock RX93.

It started as a small effort by Monster Radio RX93.1's Vice-President for Operations & Programming, Raffy Barreiro, to help college students in dire need of assistance.

[4] In addition, several RX programs and specials, as well as on-air radio personalities, have been recognized by the KBP, the Catholic Mass Media Awards (CMMA), and other award-giving organizations.