Hey, I just purchased an Ampeg B2RE Head. 450 watts at 4ohms and 250 watts at 8ohms. I want to buy a 4x10 cab that is 8ohm impedance. the cab is rated at 400 watts rms and 800 watts peak. I also would be hooking up my 1x15 that is an 8ohm and can handle 300 watts. Is it safe to use this head with that cab? Or will it blow the cabs?