hookin up 2 amps?

ok i heard of people doin it but how do i do it? cause i have 2 12s and 2 amps the amps one is 500 watts and the other is 480 watts, and the subs r like 1200 watt total i think. well any way how do i hook up both amps 2 power my 12s?? kustompup93