| City of license | San Fernando |
|---|---|
| Broadcast area | La Union |
| Branding | Big Sound 105.5 |
| Slogan | FM ko 'to! |
| Frequency | 105.5 MHz |
| First air date | 1988 |
| Format | Pop, Adult Contemporary |
| Power | 5,000 watts |
| Owner | Vanguard Radio Network |
Big Sound 105.5 is a radio station owned & operated by Vanguard Radio Network. It is located at San Fernando, La Union.
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