I am using a Peavey Windsor half-stack that I've had for a little over a year now. It's 300 watts, 120 VAC (whatever that means), and 60 Hz. I lost the power-cable so I bought a new one, but I wanted to make sure there's no risk in using it. I'm pretty sure it's safe but I'd hate to overpower it if that's possible.
It means that it has 300 watts of power . Thats a lot of power. 120VAC means that you connect it to a regular wall plug. If you can connect it to the amp and the wall socket , you got yourself an amp.