An car amplifier is designed to provide extra power to your car speakers or car subwoofer depending on your setup. Sometimes, if unlucky you can experience an buzzing sound coming through when driving and this can increase as you accelerate. When this happens, you are introducing interference into your system, its not going to damage your expensive equipment, however it can become annoying at times.
The first thing to figure out what might be causing this problem. It can be an issue with an poor ground. As being an ex car audio installer for an bass company, I have seen some very poor installs. Many understand when new to fitting the first car audio amp that grounding your car amplifier is simply finding an screw and attaching the wire onto it. The proper way to do is to find an unused seat belt bolt near the back seat area. This is an solid ground because its direct with the cars chassis and not plate welded metal on metal. Before attaching the ring terminal for the black ground wire, scrape down any excessive paint around the area to provide an good electrical contact. Any paint that gets in the way can cause an poor ground. Re check your ground. Most of the time improving this can get rid of any unwanted buzzing sounds on your car amplifier.
If your ground for your car amplifier is perfect, ensure that you are using good quality RCA cables that have shielding inside. Cheap RCA cables provide functionality yes but they are made from poor materials that can increase the chances of your car audio system getting interference through the car speakers. Thick RCA cables have shielding around the small wires found inside. This blocks out unwanted noise getting into your car audio system. Also another tip is the red 12 volt power and blue remote wire should be ran separately to the opposite side to your car. So for example, RCA cables on right hand side and power and remote on the other. The power wire can leak out unwanted signals. Moving it far away from the RCA cables will reduce potential of any kind of unwanted interference being picked up in your vehicle.
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