Hey guys my old amp was damaged when I wrecked the monte and I REALLY miss my bass so I am looking for a good price on an amp but all the numbers confuse me so can someone help me out with finding an amp to power two of these subs

http://www.directed.com/audio/subs/directed/default.asp

The old amp I had didn't put enough power to them so I don't really know where I am aming with an approximate power.