Replace Subwoofer Fuse: (Blown Fuse in Subwoofer)

Most electronic appliances have a built-in fuse typically installed in electrical circuits and PCBs.

It prevents your expensive units from blowing out due to higher voltages and uneven flow of electrical current.

Hence this particular tiny component which is the Fuse can be found in most amplifiers and subwoofers.

It acts as a shield that prevents the flow of uneven voltage to the electrical parts of the subwoofer and speaker.

If the fuse in your amp or subwoofer has blown, your unit will have no power due to a break in the electrical supply line.

Let us look into the steps to inspect and replace a blown fuse in a subwoofer. Also, we will discuss more about the Subwoofer Fuse.

How to Replace Subwoofer Fuse?

If your Amplifier or the Subwoofer is equipped with a fuse and if it has blown it means it has prevented your expensive unit from electrical damage caused mostly blowing due to the flow of uneven and high voltages.

Yes, that’s true a fuse will blow itself to restrict the uneven electrical supplies to the subwoofer that can blow your entire unit.

Let us discuss the steps to fix or replace a blown fuse in your subwoofer.

Step 1: Disconnect from Power

The very first step in troubleshooting electronic devices is to unplug them from power.

Hence unplug the subwoofer from the power source and disconnect any wires running through it to other units.

Step 2: Move the Subwoofer in a secured area

If the the placement of your subwoofer does not have enough space for troubleshooting then simply shift it to a spacious area. Do it carefully especially while lifting and placing it aside.

This will help you to follow the replacement steps with ease.

Step 3: Locate the Subwoofer Fuse

To start with the process it is very important to locate the fuse in your subwoofer.

With the help of the image below, we have displayed the position of a fuse in a subwoofer model (JXL).

Image of fuse in subwoofer

The Fuse is located at the side panel of this particular subwoofer model. It can be located from behind the circuit panel which will require its unmounting.

For more clarity, you can refer to the image below where we have highlighted the fuse with a yellow circle.

Fuse highlighted in subwoofer

Step 4: Unmount the Circuit Panel

To remove the fuse from the subwoofer you will have to remove the circuit panel.

You will need to use a pair of screwdrivers to unscrew the retaining screws from the board.

Refer to the image below, here it will require unscrewing the screws that are to the extreme edges of the panel.

unscrew the screws to access subwoofer fuse

Start by unscrewing the retaining screws from the edges to unmount the circuit panel from its enclosure.

Keep the screws aside safely as you will need them later.

Step 5: Remove the Fuse from its assembly

Carefully remove the fuse from its assembly, you can do it using your hand or use a clip to pluck and pull it out carefully.

Refer to the image below as a graphical illustration.

detach the fuse from subwoofer

Once you have removed the fuse it may look like a flat piece of glass with a thin wire line inside. Or it will appear like a glass cylinder.

The size and design of a fuse depend on the type and size of your subwoofer system.

Refer to the image below presenting various types of fuse for your reference.

Subwoofer fuse can be of different sizes

Step 6: Inspect the Subwoofer Fuse

A blown fuse will typically have two signs; it will either appear blackish or broken and another way to identify is by looking at the thin wire inside the fuse for breaks or disconnectivity.

You can refer to the image below for a better understanding.

Inspect the subwoofer fuse

If the fuse is found blown or damaged then it’s time to replace it with a new part.

Step 7: Fix the replacement subwoofer fuse

Make sure to have the right replacement fuse as per your subwoofer type and requirements.

Gently push the replacement fuse back to its assembly and align the circuit panel to the enclosure.

Secure the panel with the screws and shift your subwoofer back to its place.

Connect your subwoofer with the required units and power to check if it powers the unit like before.

If yes, then you have done the job successfully and can now enjoy your favorite boom bass audios.

Do all Subwoofers have a Fuse?

No, not all subwoofers have a fuse. The presence of a fuse is generally associated with the amplifier circuit. Additionally, whether a fuse is needed or not depends on the specific specifications of both the subwoofer and the amplifier.

What does a Subwoofer fuse do?

A fuse in a subwoofer prevents it from blowing in the event of unwanted or uneven electrical supplies to the unit.

It will not let higher voltages of current meet the electrical parts of the subwoofer. It has a thin line of wire inside a glass body that can bear a set amount of electrical power.

If the power increases above the level it will blow itself to restrict the entire power supply to the subwoofer.

How do I know if my subwoofer fuse is blown?

If your subwoofer has a fuse and it refuses to power on, it is usually an indication of a blown fuse that has restricted the power supply.

Additionally, if you inspect the fuse it will show signs of damage.

A damaged fuse can be identified with the following signs; will have black burning-like spots, broken glass, disconnected thin wire line, etc,.

Where is the fuse in a Subwoofer?

The fuse is either installed to the circuit of the built-in or the external amplifier of the subwoofer. Some sound systems have multiple fuses installed on amps as well as the subwoofers.

In simple words, if the fuse is installed in an amplifier, it is to protect it from blowing out from uneven power supplied by the main power source.

Similarly, a fuse is sometimes installed in the Subwoofer to prevent its parts from blowing out due to uneven power supplied by a non-suitable or faulty amplifier.

Does a Subwoofer have a Fuse?

Yes, most subwoofers have a fuse built-in on the amps that actually supplies electrical signals to the parts of the subwoofers and speakers.

Active subs have a built-in amplifier and it may be installed on the amplifier’s circuit.

For Passive subs, you may find the fuse installed on both amplifier and subwoofer in most cases.

However, it is not necessary that all subwoofers will need a fuse and it depends on the requirements of their specifications.

Final Thoughts

The location of the fuse for the subwoofer can vary depending on the manufacturer, size, and shape of the subwoofer.

It’s crucial to go through the product manual and see if it’s possible to replace the fuse on your own.

Some subwoofer manufacturers also provide an extra fuse with the subwoofer so that you can place it when the old fuse is blown.

Also, the location of the fuse can vary, in some cases, the fuse can be external while in some cases the fuse can be internal, This is where the user manual comes in handy.

Lastly, if you are confused or in any doubt it’s best to consult a professional technician or reach out to the subwoofer manufacturer.

Armed with a Diploma in electrical engineering and a remarkable 12 years of expertise, he excels in rejuvenating music systems, washing machines, dryers, and laundry-related appliances. Manish's profound insights and practical know-how establish him as a credible authority in appliance and music system repairs. Contact: manish.singh (at) He's always ready to lend a helping hand!