Audio Systems: Humming in my speakers when i start the car and drive, kicker rs6, rca cables

Question
I recently put in some speakers kicker RS6's in my car a 1992 Honda Prelude and everything works but there is a humming sound when i start my car and when i drive. Also when i drive or rev my engine the noise feeds back into my speakers so i can hear the sound of my car.  Please tell me how i can get rid of this problem?

Answer
You also added an amp I'm guessing? The grounding point is the cause of most ground loops. Try connecting it to a different ground spot as a test. Cars have all kinds of places to ground, but most will not be well connected to the battery ground. Factory ground lugs are a good place to test. also, your RCA cables should run down the opposite side of the car from any power wires or factory wire looms if possible.

kelly