How To Connect RCA Cables From Stereo To Car Amp


In the wiring kit supplied with your car amplifer, it will contain a set of RCA cables. These are long leads with two plugs that carry the input signal from the car stereo into the amplifier. The amp then processes this signal and amplifies it to your connected speakers or subwoofers. Now it depends on how many RCA cables you need for your amplifier. If you are using a four channel amplifier to power your front and rear door speakers, you will need two sets of RCA cables. If you are connecting a two channel or mono block amplifier for a subwoofer, you will need only one RCA cable. Now when installing this cable, it is important that you run it separate from the power wire on the opposite side of the car. This is because the current flowing down the red power wire can interfere and leak into the RCA cables creating a buzzing or humming sound to be heard when you listen to your music.

1) Key off the cars ignition to turn off the engine. You don't want to install RCA cables when the headunit it powered on as you can blow up the car amp.

2) Remove the car stereo from the din slot using the special tools.

3) Look at the back to find the sockets, on most CD players there are three sets of RCA outputs, front, rear and subwoofer.

4) Depending on your install, connecting the RCA plugs is the same procedure just into the different outputs. For example, if you are connecting a mono block amplifier, you would connect the red and white RCA plugs into the sub out socket matching up the colours.

5) Run the long RCA cable all the way down the car to the opposite side were the power is installed. You may have to remove the glovebox and side trim panels to gain full access to the vehicle.

6) Connect the RCA cable into the amplifiers input sockets matching the colours. This will now allow a connection between the car stereo and the amp so it can now amplify the music.
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