Yeah, I have a Frontman 25R too. Same thing. And I do have a strat, so the buzz is real bad.

In fact, while we're on the topic, along with the annoying buzzing sound, my amp makes this snapping sound every few seconds at regular intervals when it's turned up really high and I'm not playing anything. I always just assumed it was because it has single coil pickups, which I understand are louder buzzing than humbuckers, but I'm starting to think something more is wrong. Anyone know what this is?