Car Subwoofer Rumbling Noise: Why it Happens & How to Fix?

Do you have a car subwoofer? If so, you may have experienced rumbling noise at some point in time.

This can be a very annoying problem, and it can be difficult to determine the cause.

Subwoofer Rumbling Noise

In this blog post, we will discuss some of the most common reasons for this issue, and we will provide tips on how to fix them.

Hopefully, by reading this post, you will be able to resolve the rumbling noise in your car subwoofer once and for all! Stay with us.

Why Car Subwoofer Producing Rambling Noise?

There are a few reasons why your car subwoofer might be producing rambling noise.

Loose Speaker Wires

One possibility is that the wires inside the speaker are loose, which can cause the sound to become distorted.

When wires are damaged or connectors get loose, sound signals won’t be passing through without any interference. So, there will be problems with the sound output, and in some cases, it’s a rambling sound.

The quality of the RCA cables can also have a major impact on producing sounds like this. Especially, if the cable is a cheap one and you are hearing the sound when the music is turned off.

Dust Buildup Around the Cone

Another potential issue could be that there’s something blocking the speaker from emitting sound properly, such as dirt or dust.

This can happen over time as the dust accumulates around the speaker cone. Eventually, it will start to affect the sound and produce a rambling noise.

Gain is Too High

If the gain is set too high on your amplifier, it can also cause the subwoofer to emit a rumbling noise.

Because it becomes too sensitive and slight electrical signals passing through randomly will cause the speakers to produce unusual sounds.

Bad Crossover

Another reason for this issue could be that your car’s crossover is malfunctioning.

Crossovers are responsible for filtering out and sending different frequencies to each individual speaker in your car audio system for optimal sound output.

So, if there’s something wrong with the crossover, it might be causing the subwoofer to emit a rumbling noise.

Subwoofer Nearing its Lifespan

Another possibility is that the subwoofer is simply nearing the end of its lifespan.

This is especially true if you’ve had the same subwoofer for a long time and it’s starting to make more noise than it used to.

If you think this might be the case, then it might be time to invest in a new one.

How to Fix Car Subwoofer Rumbling Noise?

Now that we’ve gone over some of the potential causes, let’s talk about how to fix them.

Check the Wires and Connections

The first thing you should do is check the wires and connections inside the subwoofer. Make sure that everything is plugged in securely and there are no loose wires.

If you find any loose wires, try to tighten them up or replace them altogether.

It’s also a good idea to check the RCA cables and make sure they are of good quality. If they’re not, then consider replacing them with better ones.

Clean Off the Speaker Cone

Next, take a look at the speaker cone and see if there’s any dirt or dust buildup around it.

If there is, then use a soft cloth to gently clean it off. Be careful not to damage the cone in the process.

Adjust the Gain

If the gain is set too high, then you’ll need to adjust it accordingly.

Start by turning it down a little and see if that fixes the problem. If not, then keep turning it down until the rumbling noise goes away.

Check the Crossover

If you suspect that the crossover might be causing the issue, then take it to a professional and have them take a look at it.

They will be able to diagnose the problem and let you know if it needs to be repaired or replaced.

Replace the Subwoofer

Finally, if you think the subwoofer is simply nearing the end of its lifespan, then it’s probably time to replace it with a new one.

Investing in a quality subwoofer will make a big difference in terms of sound quality and performance.

One last thing I recommend before buying a new one is to check the grounding. If the ground connection is not good, it can cause a wide array of issues in your car. So, make sure that’s not causing this before you spend your money on a brand new sub.


By following these steps, you should be able to fix the problem and get your car subwoofer sounding good as new in no time!

Thanks for reading and we hope this helped. Let us know in the comments if you have any other questions. Have a great day!

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