How to stop vibration from the subwoofer in a car

Listening to good music during travelling refreshes mind and soul. But when any disturbing sound occurs, it will cause a headache. So for a good listening experience, you must ensure the audio quality and your stereo system before travelling.

We add a subwoofer to our car stereo system to get rock music to gain a good music experience. Subwoofers or speakers reproduce and boost low frequencies to enhance sound quality. A subwoofer is a crucial product in an audio system, as it gives shaking bass and sound quality music. 

Sometimes vibrations are experienced by the Subwoofer in a car. These vibrations lead to a disturbing sound. And disturbing sound sometimes may be the reason for a mood off and headache. 

There are many reasons for vibration in Subwoofer, disturbance, and knocking sound in the car. So it is crucial to know more about Subwoofer, how it works, find out the reason for the vibrations in the Subwoofer. And find out the solution for how to stop the beat from the Subwoofer in a car.

In this article, we will discuss the Subwoofer, it’s working, reasons for vibration, and ways to solve the problem. So to solve the problem, read out the full article.

What is a subwoofer? and how does it work?

Subwoofers are speakers for the reproduction of lower bass frequency. But sometimes vibrations are experienced in the subwoofers. It becomes the leading cause for the disturbance and rattling in a car before interrogating the problem and finding out the solution for how to stop vibrations from the Subwoofer in a vehicle. We need to know about the Subwoofer, its component, and how it works.

A subwoofer includes the following components like a voice coil, voice gap, cone, surround, backplate, and spider.

The physics behind this technology is, an amplifier may turn the sound waves into the sine waves of AC. The amplifier provides a positive voltage to the sub, and due to this, the cone and voice coil moves forward. Changing the voltage between positive and negative, the AC works.

Similarly, the cone and voice coil pushes backwards when a negative voltage is applied. The distance of movement depends on the amount of voltage applied.

Due to positive and negative voltage, this forward and backwards movement allows the cone to push air and produce sound.

Reasons for vibration in subwoofer

As we know, subs reproduce low-frequency sound waves to enhance the music. When these low-frequency sound waves strike with an air molecule, the metal vibrates. Low-frequency waves travel much far than mid and high-frequency waves. And this is the main reason for vibration in the Subwoofer and rattling in a car.

Other reasons for vibrations may include poor road conditions, any loosened component, or a screw in your car audio system. An overpowered subwoofer or underpowered Subwoofer may also be the reason. The reason can be any one of them, for good music experience you need to find out the source of the problem to fix it.

Finding source of problems

When we experience vibrations in subs or rattling in a car, we are looking for reasons for these vibrations to find a solution quickly. There are many reasons for this problem, but finding the source problem in our car audio system is our main concern. To see the actual cause, we need to perform some necessary steps to figure out the problem in our audio system.

Focus on bass-heavy music

To start troubleshooting, the first step is to create the music system, play music as loud as possible, put some pressure on Subwoofer, and focus on bass music. If it starts vibrating or you experience any rattling sound, examine it more closely to know the problem. Examine the speaker cone more closely; replace the cone if you see any gap or tear. If there is no tear or crack, and you still experience vibrations, you need to do padding between Subwoofer and speakers.

Check for loose components

If your problem is not fixed, check for any loosened component or part. You need to check the woofer cabinet first. If there is any reduced component or screw, then tighten it. If your problem is not resolved, again check for other parts of the woofer like a voice coil, voice gap, spider, or backplate. If any component is loose, then tighten it. Also, check the license plate and whether appropriately fixed. Sometimes open license plates also cause rattling when music is played in a car.

Check for overpowered subwoofer

Check for the overpowered Subwoofer, and each Subwoofer comes with a specific rating that defines its power handling capacity. When you turn the volume too high, that exceeds its power handling capacity. It will lead to vibrations and distorting sound in subs. So play music only in its power handling range.

When we increase volume, the signal voltage also increases. Increasing importance more than its range may move the cone forward, and this movement may end up tearing the cone and its surroundings.

So it is advised to check the safety and wattage rating of the Subwoofer. It is good to check the RMS value of the Subwoofer as it is the average and safe value to follow.

Check for underpower subwoofer

Alike, an overpowered subwoofer, an underpowered subwoofer may be responsible for the vibrations and rattling. Playing lower than RMS rating may affect the sound quality and cause rattling.When the signal is too high and the amplifier cannot handle it. Then the signal gets distorted and results in low audio and music quality.

Use automotive sound deadener

Once you identify the place of vibration, you can combat this with sound deadeners. A vast range of sound deadeners is available in the market, like dynamat Extreme, noico sound deadener, uxcell car noise deadener, and B-Quiet viscoelastic sound deadener. Dynamat Extreme is quite a famous and leading brand, but its price is relatively high. Noico is an excellent alternative to this product and affordable too. You can go for any sound deadener as per your choice and budget.

After buying a sound deadener, you need to install it in your car to get the results. The best part about the sound deadener is you can install it anywhere in your vehicle, where you experience vibration and rattling. It is not designed for any particular part of a vehicle.


Subwoofers are crucial in the list of audiophiles. Adding a subwoofer to your audio system may add more fun and enhance your listening experience. But a faulty subwoofer may also affect your listening experience and mood.

Vibrations and rattling from subs is a standard-issue, and it can be fixed very quickly when we know the source of the problem. This article discussed how to stop vibrations from the Subwoofer in a car and some steps to follow to find out the source problem. Implementing these steps may help in solving your problem.

As we discussed in this article, some steps for finding the problem and how to resolve it. Following these steps may help you in finding your problem. Or might be your problem is determined and fixed by following these steps. If not you, need to contact an expert for servicing.

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