How to Test if a DC Speaker Is Bad With an Ohmmeter

When your speaker changes how it produces its volume and some other issues, then there could be an issue that you need to check on and fix. The major cause of the issues with a bad dc speaker is the wiring that the wires can be old and turn to be blown.

Therefore, you need to check on the problems on them before fixing them. But, how can you cite the problems? You may need to check on the issues using an ohmmeter, but if you are not able, then you are on the right track since I will show you how to do that.

The article below discusses the problems easily found with the speakers, how to check on them after frequent questions, and lastly, the conclusion.

Techniques to use

MethodsfunctionEssential products
Check on the measures for testingprevents issues with the user  
Using Multimeter               gets the accurate results multimeter

Measures to take when testing if dc speaker is bad with an ohmmeter

Measures to take when testing if dc speaker is bad with an ohmmeter

When using the multimeter, you need to follow some laid measures since failure to follow can harm or damage you and the speaker. Below are some common precautions to follow when testing bad speakers:

  • Check the state of the multimeter before and after use. When the multimeter has any issues with it or any damages, it can result in poor results. And also, when you expose the multimeter, it can lead to some damage.
  • Ensure you cover the probe and store them properly since any slight damage can cause you to change the whole thing. Therefore, you need to check the multimeter frequently so that if you find any faulty parts, you replace them for safety and later give you accurate results.
  • Protect yourself by wearing protective clothing and using an antistatic wrist band while working with the multimeter since some cause electrical shocks.

How to test if dc speaker is bad with an ohmmeter

How to test if dc speaker is bad with an ohmmeter

The process has a few steps that you can follow to achieve the goal. All you need is to follow some steps carefully so that you do not miss some steps. Below are some of the steps you can follow:

1. Disconnect the speakers and their components

The first step here is to disconnect the speaker and its components by unplugging the speaker cables and the rest of the audio system to prevent you from electrical short-circuiting.Ensure you follow the rules of using the multimeter and how to handle yourself when working with the system.

2. Connect wires to the battery

The second step is to connect the wires to the battery, which in this case, we will use the nine-volt battery. Ensure you join the speaker’s wires with the receiver wires and cover them on the battery and receiver. After that, loosen the lock control when fixing the wires from the receiver to prevent damage and accelerate your work.

3. Fix the multimeter to direct current voltage setting

Consider switching the multimeter center knob and stop to ensure you shut the symbol with it, but at the same time, the multimeter should be working correctly so that you can test it by touching all the probes with each other. Therefore, if the ohm reader reads that the ohms are 0, then there is no resistance, then everything is fine, but if there are any issues, you need to use a different multimeter for the process.

4. Test speaker wires

Testing the speaker wires is the last step and the most important to take out. In this step, you need to connect the probes on the multimeter to your speaker wires and ensure that the alligator clips are right, and then you can check the multimeter batteries.

If your multimeter is working correctly, the readings should be on the screen such that when the readings are positive, it indicates that the wires are properly connected, while the negative reading indicates that there is a wrong connection with your terminals and wires.

It is advisable to avoid testing the polarity of the speaker wires with the voltmeter but instead switch the wires and check the results after.

What causes the dc speaker to go bad?

What causes the dc speaker to go bad

When a dc speaker is said to be bad, it means that there are some issues with the speaker that makes it bad such that it does not produce the quality sounds as you need them to be. Check the issues below when you want to know if they are bad:

  • Poor connections

For a speaker to go bad, the connection must be poor such that some connectors fail to work due to being old or those that wear and tear. In some cases, the connection could be loose, making the speaker go bad. Therefore, you need to keep everything right, and the connection is tight.

  • Grounding

Speaker wires can be loose or experience some damages due to traffic bumps around the area. Therefore, when the ground is slid or wet, the wires that fall on them may reduce the efficiency. However, grounding should be the last thing you need to check when diagnosing the problems.

  • Old speakers

Old speakers can be blown, and you only need to replace them immediately since they produce poor quality sound that can disturb you as the listener. When you have old or blown speakers, you need to replace them with new ones.

  • Issues with amplifiers

Amplifiers help enhance the sound quality of the systems, such that you need to have the amplifier to complete the audio system. Therefore, you need to check the settings with the amplifier and ensure they are correct to produce quality sounds.

Frequently asked questions;

  • What are the best types of wires to use for speakers?

The best type of wires to use with speakers are the lower gauge wires that transfer the signals between the systems.


The article above shows the ways of testing if a dc speaker is bad or not. The process is cool since it enables you as the user if you are good to work with your speaker or anything bad with it.

Therefore, consider following the steps of checking, and if you find any problem inside them, consider repairing or replacing the whole system.

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