Subwoofer Making noise without input (Causes and Solutions)

You’re trying to enjoy a movie or game when all of the sudden you hear a loud noise coming from your subwoofer. This noise without input can be incredibly frustrating. What could be causing this and how can you fix it? One of the most common reasons is that the subwoofer is set to a high volume. But no need to worry about it, many other people have the same experience with their subwoofers. However, there are some solutions that you can try in order to fix the issue.

In this article, we’ll explore the possible causes of a subwoofer making noise without input and provide solutions. By following these tips, you should be able to get your subwoofer back up and running in no time.

Possible reasons for a subwoofer making noise without input

There are a few possible reasons that your subwoofer might be making noise without input.

Wiring error:

The most common reason for a subwoofer to make noise without input is a wiring error. If the wires are not connected properly, they can cause the subwoofer to produce a loud, annoying noise. For example, if the positive and negative wires are swapped, the subwoofer will make a loud popping noise.

Damaged subwoofer:

Damaged subwoofer
Damaged subwoofer

A subwoofer may also make noise without input if it is damaged. If the subwoofer has been damaged, it can produce a loud, distorted noise. For instance, if the voice coil is damaged, it can cause the subwoofer to make a loud, buzzing noise or even a clicking noise and if the cone is damaged, it can cause the subwoofer to make a thumping noise.

Defective amplifier:

Defective amplifier
Defective amplifier

Having a defective amplifier can cause the subwoofer to make noise without input if it is connected to an amplifier. For example, if the amplifier is clipping, it can cause the subwoofer to make a loud, distorted noise.

Subwoofer not configured properly:

Unconfigured subwoofers can also make noise without any input if they are not configured properly. You can say that the subwoofer is not configured properly if the crossover frequency is set too low or if the phase is not set correctly.

Incorrect input:

If the subwoofer is connected to the wrong input, it can also cause the subwoofer to make noise without input. For example, if the subwoofer is connected to the line level input instead of the low-level input, it can cause the subwoofer to make a loud, distorted noise.

Common solutions to fix Subwoofer making noise without input

It is possible to fix the issue of a subwoofer making noise without input by trying a few common solutions.

Check the wiring of the subwoofer:

One of the first things that you should do is check the wiring of the subwoofer. Make sure that all of the wires are connected properly and like, that the positive and negative wires are not swapped. The positive wire is supposed to go to the positive terminal and the negative wire to the negative.

Change the settings on the subwoofer:

You can also try changing the settings on the subwoofer. If the crossover frequency or phase needs to be changed, you can try changing them. You can make it possible by adjusting the dials on the back of the subwoofer.

Inspect the subwoofer for physical damage:

It is possible for a subwoofer to make noise without input if it has been physically damaged. If you notice any physical damage on the subwoofer, you should replace it with a new one like you see cracks on the cone or the voice coil is damaged then you have to replace it with a new one. In this way, you can fix the issue of a subwoofer making noise without input.

Check if the subwoofer is properly grounded:

Another thing that you can try is to check if the subwoofer is properly grounded. If the subwoofer is not properly grounded, it can cause the subwoofer to make noise without input. You can check if the subwoofer is properly grounded by using a multimeter. Moreover, you can also try to use a grounding strap. For this, you need to connect one end of the grounding strap to the subwoofer and the other end to a metal surface. Then you need to turn on the multimeter and check if the needle moves. If it does, then the subwoofer is properly grounded.

Replace the amplifier:

If the subwoofer is connected to an amplifier, you can try replacing the amplifier. This is because a defective amplifier can cause the subwoofer to make noise without input. You can replace the amplifier with a new one or you can also try to repair the amplifier.

Use a different input source:

Try using another input source as well. For instance, if the subwoofer is connected to the line-level input, you can try connecting it to the low-level input. This is because a subwoofer usually makes noise without input when it’s connected to the wrong input and you can also try other input sources such as the USB input or the Bluetooth input.

Troubleshooting steps to take if the solutions don’t fix the issue:

In the event that the solutions above do not resolve the issue, there are a few other troubleshooting steps you can take.

1: Test the subwoofer with a different amplifier:

Test the subwoofer with a different amplifier
Testing the subwoofer with a different amplifier

If the subwoofer is connected to an amplifier, you can try testing the subwoofer with a different amplifier like a home theater receiver or a car amplifier. This will help you to determine if the amplifier is the problem or not. After this, you can try connecting the subwoofer to the amplifier and see if the problem is fixed or not.

2: Test the subwoofer with a different input source:

When the subwoofer is connected to a source device like a Blu-ray player, you can try testing the subwoofer with a different source device like a DVD player or a cable box. This will help you to determine if the source device is the problem or not. After this, you can try connecting the subwoofer to the source device and see if the issue is resolved or not.

3. Take the subwoofer to a professional for repairs:

If the troubleshooting steps above don’t fix the issue, then it is possible that the subwoofer itself is damaged and will need to be repaired by a professional. He can further diagnose the problem and repair the subwoofer as necessary. This is usually the last resort option and should only be done if all other troubleshooting steps have failed.

Conclusion: 

On the basis of the above observation, it can be concluded that if your subwoofer is making noise without input then there are a few things that you can try to fix the issue. You can try to check if the subwoofer is properly connected, if the subwoofer is properly grounded, or if the amplifier is defective. If the issue is still not resolved, then you can try to use a different input source.

Lastly, if the issue is still not fixed, then you can take the subwoofer to a professional for repairs. By following the troubleshooting steps above, you should be able to fix the problem and get your subwoofer working properly again.