Ok, so I have the option of getting an Ampeg Micro VR head for fairly cheap. The only problem is that the only speaker/cabinet I have available to me at the moment is a Fender Rumble 100 combo. The Ampeg head runs 200 watts @ 4 ohms, and I'm not sure whether I'd be able to use the speaker from the Rumble. If so, how would I connect them up?