DWKX, branded as 103.5 Max FM (identified as "103-and-a-half Max FM" on air), is an FM radio station owned by Advanced Media Broadcasting System, Inc. The station's studio is located in Ortigas Center, Pasig City, with its transmitter located in Mandaluyong City.

It was known as K-Lite 103.5 from 1995 - 2007 and Heart 103.5 from January 2007 - June 2007.

In November 2006, the management of K-Lite decided to reformat and reorganize the station. In December of the same year, it was relaunched as Heart 103.5 with new on-air personalities. They transferred their studio from Paragon Plaza to Jollibee Plaza.

On June 19, 2007, at exactly 9:00 pm, 103.5 was again reformatted, changing their name to 103 1/2 Max FM.

Seven of Manila's best disc jockeys (Joe Schmoe, Paul Reno, Jay Latin, Dick Reese, Joshua, Martin Gill and Little David) set out to form a radio station that would best the much-established and well-known old hands of the industry. The new station occupied the frequency, studios and equipment formerly handled by the defunct standards music station DWCS (103.5 CS, then owned by Global Broadcasting System) and changed its call sign to DWKX. K-Lite started airing on October 23, 1995.The first DJ to go on the air was Joe Schmoe; his first song was Pride (In the Name of Love) by U2. Within a few months, it became the favorite radio station of the young professionals and more outspoken listeners.