Whining Noise from Speakers When Accelerating: 6 Methods

You love having a journey with your favorite tunes on your car audio But what happens when an unwelcome whining noise from speakers when accelerates? So, in this article, we will guide you step-by-step through the process of resolving this annoying problem.

Whining Noise from Speakers When Accelerating: Step-by-Step Guide

With whining noise from your car speakers when accelerating, we provide 6 solutions to help you fix this audio problem:

Capacitor installation

Often, the whining noise originates from power issues. A power capacitor can resolve this problem by providing your amplifier with the required extra surge of electricity when it’s working the hardest. Here’s how you can install one:

First, you need to identify a suitable location to install your capacitor. It should be as close to the amplifier as possible. After that, disconnect the amplifier’s power by removing the fuse in the power wire connected to your car’s battery.

Next, you connect the capacitor’s positive terminal to the amplifier’s positive terminal using a short piece of the same type of wire as your system’s power wire.

Now, you ground the capacitor by connecting its negative terminal to a clean, bare metal spot on your car’s chassis. After the above process, you reconnect the amplifier’s power by reinstalling the fuse in the power wire. And the capacitor should now be working and alleviating any electrical strain causing the whining noise.

Modify the ground location

An improperly grounded audio system might cause electrical interference, leading to the whining noise. Here’s how to adjust the ground location:

In the first step, you locate your current ground wire connection to your vehicle. After that, find a new grounding location – a bare metal area that’s free of rust or paint. Next, you detach the ground wire from its current location and now, you use a screw or bolt to attach it to the new location, and in the process, you need to ensure a strong connection.

An inline noise filter or ground loop isolator installation

Installing an inline noise filter or a ground loop isolator can help reduce the whining noise. So, here’s a simplified guide:

First, you purchase a suitable noise filter or isolator from an electronics store or online. Next, turn off your vehicle and disconnect the negative battery terminal to avoid any electrical mishaps.

After that, locate your stereo’s power cable, it should be the red wire coming out of the back of your stereo. Now, you cut the power cable where you want to install the filter or isolator. And you continue to connect one end of the filter or isolator to the power cable coming from the stereo. And connect the other end to the power cable leading to the power source.

Lastly, you test the setup by turning on your car and stereo to ensure it’s working properly and the whining noise is reduced.

Inspect the Ground Wire Connection

The ground wire is crucial for the stable operation of your audio system. A weak or corroded connection might cause a fluctuating power supply and induce noise. Here’s how you can inspect and adjust it:

First of all, you need to locate the ground wire – it’s usually black and connected from your audio system to a part of your car’s metal chassis.

Next, you inspect the connection, if the wire is firmly attached. And look for any signs of rust or corrosion around the connection point. In the process, if you find rust or corrosion, clean it using a wire brush or sandpaper. Then, reconnect the wire and ensure it’s tightly attached.

Inspect All Other Wire Connections

A thorough check of all wire connections can help identify if any loose or corroded connections are causing the problem. Let’s look into some specifics:

Speaker wires

The first one is speaker wires, which are used to bring the amplified signal from your stereo to your speakers. Here’s how to check them:

Now, you find the speaker wires, they usually run from the back of your stereo or amplifier to each speaker. Next, take a good look at these wires. Are there any places where the wire is damaged or exposed?  If you spot any problems, don’t worry! For minor damages, you can wrap the affected area with some electrical tape. If the wire is heavily damaged, you might have to replace it with a new one.

Car speaker

RCA Cables

Next are RCA Cables, which transmit audio signals between your audio components.

The first thing you need to do is find your RCA cables. These cables are usually different colors and connect the various parts of your sound system.

Once you’ve found them, now, you take a closer look. Are there any cables that look damaged or not properly connected? If you find a loose cable, you will push it in so it’s firmly connected. And what if a cable is damaged? In this case, you’ll have to replace it with a new one.

Power wires

In terms of power wires supply electrical power to your stereo system.

First off, you need to locate the power wires. These are typically colored red and are responsible for connecting your stereo system to the car’s battery or the fuse box.

Once you’ve found them, take a good look at them. Do they show signs of wear and tear or fraying? If they do, you can use electrical tape to patch up small damages. If the wire is in really bad shape, you may need to replace it with a new one.

Read more: How to Hook Up 2 Amps with 1 Power Wire: 5 Simple Steps

Antenna

Lastly, you need to check the antenna. Normally, your car antenna captures radio signals for your car stereo.

In the first step, you locate your car antenna, it might be a physical rod on the outside of your car or a wired antenna inside the vehicle.

When you check, ensure the antenna is properly mounted and the antenna wire is securely connected to your car stereo. If the connection is loose, tighten it. If the antenna or wire is damaged, consider replacing it.

Car Antenna

A magnetic shielding foil or mu-metal installation

Magnetic interference from power cables and other sources could cause a whining noise in your speaker. So, here is a step-by-step guide to check:

  • First, you need to purchase some magnetic shielding foil or mu-metal. You can find these in most electronic or auto parts stores, or you can order them online.
  • Next, identify which parts of your audio system are most sensitive to magnetic interference. These usually include your speaker wires, power wires, and amplifier.
  • Then, you cut the magnetic shielding foil or mu-metal into appropriate sizes that can wrap around these components. Next, wrap the shielding material around the components securely but without causing any strain or tension on the wires or the device itself.

Now, you continute to secure the shielding material in place using electrical tape, making sure it doesn’t move or fall off. After installation, test your audio system to see if the whining noise has been reduced or eliminated.

Common Causes of Whining Noise from Speakers During Acceleration

To help you identify the problem quickly, here we present 6 common causes:

Transmission issue

Sometimes, the whining noise you hear while accelerating is not from your speakers but from your car’s transmission. This is usually the case if the pitch or volume of the whining noise changes with your car’s speed. So, when it happens, It leads to several transmission problems, such as low transmission fluid, worn-out transmission gear, or a faulty transmission pump.

Valve Train

Another cause could be your vehicle’s valve train, which includes components such as valves, valve lifters, pushrods, and rocker’s arms. For example, a worn-out valve or valve lifter can cause a whining or ticking noise that increases in volume as you accelerate. Thus, in this situation, you should take your car to a professional to check.

Faulty Belt Tensioner

Moreover, you consider another cause is the belt tensioner in your car. When the tensioner is loose or worn out, it can cause a whining noise, especially during acceleration. This sound can easily be mistaken for speaker noise due to its high-pitched nature. If you suspect a faulty belt tensioner, we highly recommend you take your car to a professional to repair it.

Engine Knocking Noise

In some cases, what seems to be a whining noise from your speakers might be an engine knocking noise, which can be quite prominent when you accelerate. Various factors including incorrect spark plug gaps, low-quality fuel, or carbon deposits in the combustion chamber can cause this. If left unchecked, engine knocking can cause serious damage to your engine, so it’s crucial to have it inspected by a professional if you suspect this is the cause of the noise.

Alternators

Just like any other part of your car, alternators can start to have problems, causing noise from your speakers. And one common sign of a faulty alternator is a whining noise, especially when you rev the engine. If you suspect your alternator might be the problem, it would be a good idea to have a professional mechanic check it out.

Car Generator

Conclusion

While a whining noise from your speakers during acceleration can be irritating, the good news is that it’s often not a serious issue. Whether it’s a wiring problem, a grounding issue, or even a mechanical problem, understanding the possible causes and solutions can help you resolve this problem.

FAQs

  1. How can I remove the whining noise from the radio caused by the alternator?

    The whining or clicking sound you hear, which changes in pitch with the engine speed, can often be attributed to engine noise. In such cases, the installation of an alternator noise filter can be beneficial. This device, which is placed on the power line connecting the battery and alternator, can effectively reduce the issue.

  2. Does the alternator have an impact on the stereo system?

    Yes, the alternator plays an important role in powering various parts of your car. This includes not just the stereo, but also the headlights, power mirrors, electric steering, power windows, windshield wipers, heated seats, and dashboard instruments. Whether you're driving or idling, the alternator is responsible for directing power to these components.

  3. What could be causing my speakers to make a shrill noise?

    One of the most common reasons for speakers to hum, buzz, or whine, particularly in home audio setups, is a ground loop issue. This problem commonly arises when your amplifier and audio source are plugged into separate socket outlets but are linked with an analog audio signal cable.