Thanks for the help so far guys.
I already have the amps, or I have one and another is on the way. I have heard that the 1850 was different in that it handles a lower ohm load better. It still isn't recommended to do 2 ohms bridged according to qsc, but I wonder if it would in a home environment? The current vs. voltage is new to me, I just thought it was built to be "tougher" than the rest of the rmx series.
Looking at Mrkazadors winsd file, I'm thinking that more volume would be better. Correct? It looks like it reallly falls off quick.
Maybe I should have phrased my original question different.
What would the ideal sealed box volume be for 4 1223's powered by a bridged 1850?