I am pretty new to all of this. I am wonderning about ohms and cabs. My funds limit me... I am looking to get an Avatar cab. I am thinking about a B210 NEO now and adding a B212 NEO or (2) B110 in a couple of months. I don't understand ohms. What kind of amp do I need? How many Ohms? I am looking into a GK amp, but what ohms does it need? Why does the power change compaired to ohms? How many watts do these cabs need?