Are you experiencing a whining noise from your speakers when accelerating? No need to panic, this is actually a very common issue many people face after they upgrade their car’s sound system. In this article I will tell you why this problem occurs and go into detail on what you can do to stop the whining noise permanently.
Why Does Whining Noise come from the Speakers when Accelerating
So why does the whining noise come from your speakers when you accelerate? Well, there can be a few reasons why you get a whining noise. An improper installation is one of the main reasons. You might have missed or overlooked something when you wired your new components in your car. I have included below the most common reasons for whining noises from your speakers.
More often than not, the whining noise comes from your car’s alternator. The alternator sound gets into your audio head unit and/or speaker wires. From there it is amplified into your speaker system. If you can feel the noise increasing when your RPM goes up, then this is definitely the culprit.
Non Alternator Noise
Although alternators are most likely to cause the whining noise when you accelerate, there can be some other reason for the problem. As you might know, any component of the audio system can pick up and amplify a noise in your car.
An amplifier can also pick up your engine noise and trasmit them through the speakers. This usually occurs when the amplifier is not properly grounded. When an amplifier is not properly grounded you will hear a whining noise in the background of your speaker.
How to Stop the Whining Noise Coming from your Speakers
To properly address the issue, first, you need to identify where the noise is coming from. Is it an alternator or non-alternator noise?
If you are certain that the whining noise in your speakers is coming from the alternator, this means that the alternator sound is getting into your your stereo system. In such a case, I would recommend you to install a noise filter or multiple in your car depending on the level of sound.
What is a Noise Filter?
A noise filter is a small device that is installed in the alternating power current line. This device blocks a large amount of noise being transmitted through the cable lines. Don’t worry this won’t negatively affect the audio quality.
Where to Install a Noise Filter?
The best place to install a noise filter would be on the powerline for the head unit. This will cancel out any unnecessary whining noise from entering or leaving the stereo. You can get away with installing only one noise filter, but if the whining noise doesn’t stop you can add an additional noise filter between your car’s battery and alternator.
How to Properly Ground an Amp?
(pic of right and wrong ground)
If you’ve just spent countless hours checking your car’s alternator and still couldn’t seem to fix the problem, then chances are the problem is with your amplifier. Most likely the amp is not properly grounded. In my day, 9 out ten amplifier installations only have one screw holding in the ground wire. It doesn’t seem like a problem then, but over the years, depending on how hard you drive you car, the wire tends to get loose from the grounding point. People also make another mistake when they ground their amplifier to their car chassis. When grounding and amp, it is always recommended that you thoroughly scrape the paint off the section where you want to add your ground wire. You need to make sure that the area is properly cleaned and no paint or other residue is there. Finally you should avoid using screws to hold your ground wire. Always use a nut, bolt, washer set to tightly hold it in place. In some cars, there is a seperate grounding point on the chassis of the car that you can use to ground your amplifier rather than drilling a hole.
Where to put your Ground Wire?