kicker amp buzzing problem?

[David8650]

i have a kicker kx 550.2 watt with two kicker CRV 12s , and two sony xplod 12s with a xplod 800 watt amp in my ford explorer. today i unhooked the kicker amp to run the wires under the carpet so they would be hidden better. when i hooker the amp back up the kicker 12s buzz like crazy, but when i unplug one of the kicker 12s the buzzing stops for the one still hooked up. ive used the same ground and rca wires as before and have unplugged everything and hooked it back up but i have the same problem. whats up? please help