How to Fix Your Car Speakers Buzzing: Step-by-Step Guide

There is nothing more annoying than your speakers buzzing. Especially when you are on a long car journey and you can’t seem to get the buzzing to stop.

In this article, we will walk you through the steps to fixing car speakers that are buzzing. We will provide tips on how to identify the source of the problem and how to correct it. So if your car speakers are driving you crazy, keep reading!

1. Identify the source of the problem

The first step in fixing your car speakers’ buzzing is identifying the source of the problem. There are a few things you can do to help identify the issue:

  • Check if the sound is coming from one specific speaker, or if it is affecting all of them
  • Try turning up the volume on your radio; if the sound gets worse, it is likely that the problem is with your speakers
  • If the sound only happens when you have your music turned up loud, it could be a sign that your speakers are overloading

2. Clean your car’s audio system

If your car audio system is buzzing, the first step is to clean it. Debris and dirt can build up over time and can cause a buzzing sound. To clean your audio system, you will need a cotton swab and some rubbing alcohol.

First, unplug your car’s audio system from the power source. Next, use the cotton swab to wipe down all of the exposed parts of the system. Be sure to get into all of the nooks and crannies.

Once you have wiped down the system, use the rubbing alcohol to clean any areas that are particularly dirty.

Allow the audio system to dry completely before plugging it back in and testing it.

With any luck, the buzzing will be gone! If not, move on to the next step.

Check your speaker wires
Check your speaker wires

3. Check for loose connections

If your car speakers are buzzing, the first thing you should check is for loose connections. Most car speakers are wired directly to the battery, so if a wire is loose, it can cause a buzz.

Make sure all of the wires are tight and secure. Another common cause of car speaker buzzing is a loose ground wire. The ground wire helps to complete the circuit and if it’s not secure, it can cause a buzz or a popping noise.

Make sure the ground wire is tight and connected to a metal surface. If you’re not sure how to do this, consult a professional.

4. Check your patch cables

RCA patch cables on cars also cause static sounds in vehicles. You can try removing the cables in the amp to see if it’s limiting you.

When the connectors are removed you should put either side of the patch cables into the Left or Right inputs of the amplifiers. Make sure the motor and the sound system work properly.

If the noise is not heard then plug the cables into your amplifier or turn the power back on. It’s likely your patch cords pick up static noise. If it’s the cable that is responsible, try rerouting the cables.

When all else fails, you can try replacing the RCA patch cables with a new set of shielded cables. This should help to reduce any static, popping or buzzing noise.

5. Check any audio problems with your car’s amplifier

If you are still experiencing audio problems after checking your car speakers, the next step is to check any audio problems with your car’s amplifier. To do this, you will need to test the amp’s output.

This can be done by using an oscilloscope or a multimeter. If there are any issues with the amp, they will need to be corrected in order to fix the buzzing speakers.

Using a multimeter on amplifier
Using a multimeter on amplifier

How to use a multimeter on a car’s amplifier

If you want to use a multimeter on your car’s amplifier, you will need to follow these steps:

First, disconnect the negative battery terminal. This will prevent any damage to your car’s electrical system.

Next, locate the amplifier. It is usually located under the seat or in the trunk.

Once you have found the amplifier, locate the RCA inputs. These are usually color-coded and will be labeled “left” and “right.”

Now, you will need to set your multimeter to the DC voltage setting. Once it is set, touch the black probe to the ground wire and the red probe to the positive wire.

You should now be able to read the voltage output on the multimeter.

If you are experiencing any audio problems with your car’s amplifier, you will need to have it repaired by a professional. Audio problems can be caused by a variety of issues, such as bad ground or faulty wiring.

So if you are not comfortable diagnosing and repairing audio problems, it is best to leave it to the experts.

6. Replace your car speakers if they are damaged

If you have tried everything above, you may need to replace your car speakers if they are damaged. In some cases, the speaker itself may be damaged which is causing the buzzing noise.

There could be a hole in one of the speakers or perhaps you missed a faulty wire somewhere. If you’ve tried everything, I’d recommend bringing it to your local repair shop and letting them have a go before buying a new set completely.

They might be able to find it easier as they’d have the experience and knowledge on it. But, they may just be completely gone.

If this is the case, you will need to purchase new speakers and have them installed by a professional. Have a look at some of my best budget car speakers.

Car speaker replacement is not a difficult task, but it is best to leave it to the experts if you are not comfortable doing it yourself.


I hope this article has helped you solve your car speakers’ buzzing issue. If you have tried all of the steps above and are still experiencing problems, it is best to leave the diagnosis and repair to a professional. Thanks for reading!

About Shawn Shepherd

Hi, I'm the owner of the Hifi Guide and have been an audio lover enthusiast for over 16 years. I have a Bachelor's degree in Sound Engineering and I work on producing content for the Hifi Guide in my spare time. My love for audio stemmed from my Dad who was an audio technician, and now I share my knowledge here on this website!