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How to Test a Subwoofer with a Multimeter

The vibrations of your subwoofer are weakened or disappear over time. In my experience, I have had almost everyone start making a buzzing sound after years of heavy use. Thankfully it’s easy to fix, and you can test if something is wrong by feeling around inside with either hand for about 10 seconds before removing any objects that may be trapped under the carpeting where they’re not supposed to go.

To test your subwoofer, you can use an affordable and easy-to-carry multimeter. It’s important that the device be able to measure resistance to work properly, so make sure all parts are connected correctly before taking any measurements.” In this blog post we will discuss about how to test a subwoofer with a multimeter.
To test your subwoofer, first, remove it from its housing. You’ll need a small-medium-sized star screwdriver for this task, and it’s best if you can find one with an insulated handle, so they don’t get too hot while in use – because who wants their hands burning when testing out speakers? Connect the positive (black) probe of each end onto Fleetwood Mac songs on vinyl record player giblets, then turn up that multimeter ohm setting until readings start showing zero resistance across any wires or terminals under scrutiny; now, make sure every terminal has been tested before putting everything back together again.
Subwoofers are a big investment, and it’s important to ensure you have the right one for your car. There’s an easy way we can test them, but before then, let me walk through this process with you.

7 Steps to Test Subwoofer with a Digital Multimeter

One of the easiest ways to tell if your subwoofer has died is by using a multimeter. You can determine whether or not it’s in good working order and also see how much resistance there would be on either end-the voice coil’s side (away from where music comes out) or near where sound waves travel into space.
The steps are as follows.

Step 1. Disconnecting the Subwoofer

To get accurate measurements, you must turn off or disconnect the power source of your subwoofer.

Step 2. Untangling All Cords

Unscrew the screws from your subwoofer. Please remove all of its input and power cables to free it up.

Step 3. Removing the Subwoofer from its Housing

The next time you need to replace your car’s sound system, remember that it is not enough just for the speakers or subwoofer. You must also take care in accessing this component and removing any covers before getting started.

Step 4. Accessing the Subwoofer’s Voice Coil

You can start testing for sag with your multimeter connected to the voice coil terminals. This test will tell if any shorts or noises are coming from inside this component and could be an early indicator that it needs replacement.

Step 5. Connecting the Multimeter’s Probe

Make sure the multimeter’s positive probe is connected to your device’s voice coil.

Step 6. Attaching Multimeter’s Probe

Then, attach your multimeter’s negative probe to the largest metal part of this device.

Step 7. Turning the Multimeter On

Then, turn your multimeter on and set it to its Ohms setting. This will allow you to determine the resistance of the subwoofer for proper design calculations.

How to Test a Subwoofer with a Multimeter

Possible Results

● The multimeter reading shows no reaction or resistance at all. This could mean that your car subwoofer has been blown, resulting in a loss of bass sound quality; the voice coil may also be damaged and need a replacement for optimal performance.
● The multimeter reading is steadily increasing. This means that your voice coil has reached its limits and may be damaged due to over-heating or exposure, which can lead to other problems down the line, such as an open circuit in some cases.
● The multimeter reading is greater than 1.0 ohm, so your coils are safe and in good condition! This could mean the problem lies elsewhere, or you have not fully connected everything yet – so keep trying until it reads as expected next time.


When you want to ensure that your subwoofer is in working order, knowing how to test them with an inexpensive multimeter can save money on future repairs. If any problems are found during this quick inspection, they will need fixing immediately, so avoid costly downtime by having the know-how.

When repairing or fixing things around your house, I recommend hiring a professional rather than trying. You’ll spend more money in the long run if you do this on your own because they can find and fix what needs to be fixed immediately while saving time for both parties involved.

Frequently Asked Questions

What are the signs of a blown subwoofer?

Have you ever heard of a car’s subwoofer? It produces low frequencies responsible for making the sound waves we notice when listening to music or movies. If your speakers don’t produce clear audio, there may be something wrong with them, which could also mean their bass has blown out.

What are the causes of a blown subwoofer?

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One of the most common causes of subwoofer failure is providing an excess signal. When you overdrive your Sound system too much, or if there are high levels in general (like when playing heavy metal), clipping can occur, leading to a blown unit.
When an amplifier is clipping, it can cause serious damage to the sound system. As a result of this intense voltage being applied across its components, such as woofers and speakers, which are typically made out of materials that will melt or catch fire if overheated by too much power (or “driven into retirement,” in more figurative terms), there’s always a risk for permanent distortion on anything associated with excessive force application–like your car audio equipment.

Ch Ashraf
With over 25 years of electrical contracting experience in the Gilawala area, Ashraf Electric provides reliable and efficient residential, commercial, and light industrial electrical services. As a locally owned company based in Lodhran, we specialize in quickly diagnosing and resolving electrical issues both big and small. Our team of highly skilled electricians is available 24/7 to ensure your electrical systems continue running safely. Whether you require a full rewiring, socket and switch upgrades, safety inspections, or lightning protection systems, contact Ashraf Electric for exceptional customer service and quality electrical workmanship.