I'm guessing that you're talking about 800 watt max Kicker subs, so that mean's they each run 400 watts RMS, which is the continuous power. You're then going to want a 1600 watt 2 channel amp, NOT 4 channel. 2 channel would split it into 2x800 max, which would be 2x400 RMS. If you're looking to save money, get a Legacy 1490 Amp, awesome amp for $140. If you're looking to throw away your money, go buy the most expensive Rockford Fosgate amp you can find.