I just bought a PA mixer. It's a Peavey 6 channel XR600C

It is 210W at 4 ohms. 300W at 2 ohms.

Here is my question.

What would be the most common way to go about doing this?

I want to get the full 300W out of it.

Should I get two 150W 4 ohm cabinets? and that will combine to 300W at 2 ohms?
I don't have a clue. Can a mixer power speakers? I thought you needed at least a power amp. Generally I think you have the right idea.

There might be UG'rs in Riffs and Recordings that know this stuff better if you don't get any answers here. Good Luck