If you have recently added a car audio amplifier to your car audio system to your car door speakers and you notice you have interference, this can disrupt sound quality. At low volumes, you may hear a hissing or buzzing sound coming from your car speakers and it may gradually get louder as you increase the RPMS of the engine. This is a common car audio problem that many fail to resolve, today I am going to explain all of the different ways to help you get around this.
The first thing you should do to troubleshoot is to check the ground connection for the car amplifier. Moving it to another area that is the closest to the metal chassis of the car is always a better option. Finding a random screw is usually a poor ground. The best ground in all cars in the trunk area is under the carpet, the bolt that holds the seat belt down is the best location. Its solid to the cars metal and is strong metal, not tin metal welded onto the chassis of the car, which does work but it not pure metal. When creating a ground for your car amplifier, ensure that the ground where you mount the circle ring terminal is sanded down. From the factory, there is paint sprayed in this area and this can cause an poor electrical connection if not removed. Using sandpaper or a flat head screwdriver to remove any paint will expose the bear metal of the vehicle.
Finding a better ground location and preparing it correctly usually fixes this kind of problem. If the buzzing sound is still heard from your car speakers, then the next thing to do is replace your poor cheap RCA cables with expensive ones that have foil shielding. This prevents interference from being picked up, the cheap RCA cables you get free with most car audio car amplifier wiring kits don't have shielding in usually. You also want to run the RCA cables down your car on a separate side away from the power and blue remote wire. This is because the power cable or remote wire can leak out signals that can get picked up by the RCA cables. Moving the RCA cables further away from them two cables can prevent any kind of interference that may get picked up.
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