Okay, situation: My SWR 350 is putting out 240 watts @ 8 ohms into a Dr. Bass BL115 cab. It's not enough volume. Handling on the Dr. Bass is 500 watts (presumably at 4 ohms) I want to add another 8 ohm cab, getting me 350 watts out of the head. But the cab is rated at 200 watts @ 8 ohms. Will it be okay to pair cabs up like this?