Wiring an amp

I currently have a 2 channel amp that is running at 2 ohms 1200 watts, and it is powering 2 subwoofers, which are 4 ohms each. At first I thought this was fine, until I learned from audiobahn, that the model subwoofer I had, had been retested to a higher RMS of 800 each. I was wondering if there was a better way to wire my current amp, or if I should just wait to get a class D phoenix gold amp that will push 1500 at a mono load.

I doubt you will even be able to hear any real difference

to figure output gain ........ gain = 10*log(power1/power2) or 10*log(1500/1200) = 1dB