Here is my situation. I currently have a SVT -4 Pro, into a Carvin BRX - 4 x 10. Looking to add some bottom end, so I am thinking about adding a MB Powerhouse 1200 (4 x10, 1 X 15). My question is, should I go with the 8 ohm version, so that I can run both the PH1200 and the Carvin cab (also 8 ohm) or bag the 4 x 10 (meaning keep it for home) and get a 4 ohm PH 1200 for when I (hopefully eventually) play out? Even if it is overkill, I think it will be a neat toy. And if my understanding of the impedance is incorrect, please feel free to correct me. Eventually, I want to add a Titan V12 head and run it @1200 W (@ 4ohm). Thanks in advance!