| There are several noise sources in a car audio | | | | head unit. Try running a new earth or ground wire |
| setup. In this article, I'll talk about one where your | | | | from the rear of the radio to a new position |
| car speakers produce noise that seems to | | | | (earth) on the car's chassis, replacing the existing |
| increase when you "rev" the engine. You'll get to | | | | earth wire. |
| learn how to eliminate that annoying noise and | | | | If you have installed an amplifier, ensure that the |
| enjoy your music. | | | | RCA cables running from the head unit to the |
| First, you must understand that this is simply | | | | amplifier are of good quality. Also make sure they |
| interference or induced noise. Induced noise can | | | | are run along the car away from the car's |
| sound like clicking, popping, whirring, buzzing, | | | | existing wiring and away from the amplifier's |
| whistling, or whining. This noise always has a | | | | power cable. For the sake of testing, try running |
| source such as the alternator, car power wiring, | | | | the RCA lead loosely between the head unit and |
| amplifier, etc. So this means that the problem can | | | | the amplifier without actually running them under |
| be tackled at the source. Now, you just have to | | | | the carpet. "Rev" your engine with the radio on |
| find it. | | | | low volume and see if the noise is gone. |
| Power line noise problems (such as those from | | | | If you still have the noise, consult a car audio |
| alternators) can be fixed by adding a capacitor or | | | | expert. There are a few things in car audio that |
| power line filter to the live source of the suspect | | | | require expert assessment. There could be a |
| component. | | | | compound issue. A good car audio expert is |
| Another area to investigate is the earth, also | | | | better equipped to diagnose the problem. |
| known as ground wire, to the rear of the radio or | | | | |