DYGB began operations on August 10, 1991, as Power 95 FM, airing a CHR/Top 40 format.
It became the first FM radio station in Dumaguete to use Digital Audio Tape (DAT) and compact discs (CDs) for song playback and cart machines for playing national and local commercials, jingles and station promotional materials, all of which were acquired from the United States through JAM Creative Productions.
The said format has proven popular to its listeners, as it quickly became the overall #1 FM radio station in Dumaguete and the entire province of Negros Oriental.
GLBSI later responded to DYEM's case by moving DYGB to its current frequency, 91.7 MHz, with the branding being changed to Power 91 FM.
Since the reformat, it remains the city's most listened-to FM radio station, a distinction that still holds up to this day.