Car Subwoofer Troubleshooting

10 Car Subwoofer Troubleshooting

If you’re reading this blog post, chances are you’ve got a subwoofer that just isn’t as loud and punchy as it used to be. This article will teach you how to the car subwoofer troubleshooting.

A car subwoofer is a speaker that reproduces low-frequency sound. It’s usually about the size of a small refrigerator and mounted somewhere in the trunk or under the back seat. It’s not only responsible for producing high-quality bass, but it also helps to balance out the frequencies from other speakers on your stereo system.

Here we are discussing some solutions for Car Subwoofer Troubleshooting:

1. Subwoofer transformer hum:

A transformer hum is usually caused by electrical interference that’s present in the occupant of the car. The most common reason for a transformer hum to develop is when extraneous electrical signals get coupled into the power lines that feed the speaker system and then amplified by its speakers because it’s time-sensitive to those 600 or 1,200 Hz power line cycles.

If your subwoofer transformer hums, but the light on your amp is solid and you have no static, it’s most likely a grounding issue. Check all of your connections and make sure that the screws aren’t loose. If there’s still a problem, try flipping the cables around backward or sideways – it might fix it. If not, contact an audio professional to find out what to do next.

2. Subwoofer buzzing at high volume:

When your subwoofer’s buzzing, it means one of the following problems.

Check the in-dash for loose or broken connections of wires and grounding wires by examining them with an inspection light.

Loose items behind the dashboard may also be creating a buzzing sound when they vibrate. Remove the loose items, and then tighten them back to their original positions if possible.

Tighten all screws near ground points that have not been loosened enough to cause any ill effects on electrical ground paths.

The voltage is too high for your system and you have to set the amplifier gain at a lower level.

Your speakers are wired in series and need to go through a 3-to-1 impedance matching transformer (either before or after the amp).

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Your audio system should now be free of buzzing sounds at high volume levels. If you don’t have the tools and knowledge for installing your own subwoofer then call Grant Exteriors Solutions who are experts in automotive audio retrofitting.

low profile amplified car subwoofer
amplified car subwoofer

3. my subwoofer cut in and out the soundbar:

In this Car Subwoofer Troubleshooting, there are a few possible reasons that your subwoofer is cutting in and out the soundbar.

Immediately check the connections of the speaker to the soundbar. It’s possible a wire is loose, broken, or improperly connected. unplug the power cord from the outlet for about five minutes and then turn the power back on. This should fix any short circuit problem you have with your power supply.

Check the inputs on your soundbar with other items you have plugged in such as video game consoles or laptops to make sure they are coming through clearly.

if your cables are too long or pulling against one another (or other things) too hard
to fix them so they’re not causing problems by pulling hard enough to break whatever connections they’re plugged into.

4. subwoofer cuts out randomly

The first thing you should do is check your fuses and make sure they are not blown. If the fuse is good, then you need to test for power and ground at the speaker’s connection point(s).

You can either unplug each wire of the connector from it’s respective terminal bolt or remove the bolts from their terminals by loosening them with an Allen wrench and using a multi-meter to test for voltage drop (AC volts).

If there is no voltage present, replace that wire. Please make sure this measurement does not come across as threatening; checking wires will produce about 3 volts of electricity in any given system.
You also have an option of replacing your alternator that may be causing issues with the power supply.

5. subwoofer making noise when turned on:

The noise might be the result of turning the subwoofer on while there are objects close to it. The reason for this is that a speaker vibrates when turned on, and most find it annoying at first. There are two possible solutions to this:
(1) put your feet at a speaker’s base and see if the problem lessens and
(2) move away from any nearby objects so they don’t dampen the sound waves.
If you’re satisfied with these options, then discuss the issue with your favorite brand’s customer service representative to make necessary changes.

6. subwoofer stopped working while driving;

The vast majority of the time, it’s not an issue with your subwoofer(s). If it’s an electrical issue with the car such as an alternator or battery then the diodes that power the subwoofer could have been damaged.

Subwoofers don’t have brains, and they aren’t really designed to be “smart” enough to know the difference between a good set of signals, and a bad or intermittent one. There are a few common possibilities for this happening:

  1. The footwell or dashboard where you’re installing the sub already has something in it that interferes with the signal/power supply line (like battery power converters)
  2. An amp fuse has blown in the amplifier itself (this is usually an easy fix)
  3. You might be getting electrical interference in your system somewhere else.
12 inch terminator subwoofers

7. subwoofer stopped working but amp is on:

It’s possible that your amplifier is working fine, but the subwoofer itself has stopped working. It’s also possible that there is an issue with the wiring or that the subwoofer has blown a speaker.

The first step would be to test whether the amplifier is working properly. You can do this by connecting another speaker to the amp and seeing if it plays. If it does, then you know that the problem is with the subwoofer.

If you suspect there’s a problem with the wiring, you can try reconnecting everything and see if that fixes the issue. If it doesn’t, then you may need to take your car to a mechanic to have it checked out.

8. subwoofer making noise without input:

If your car subwoofer is making noise without input, there are a few possible causes. First, check to see if the subwoofer is turned on. If it is, then the most likely cause is a blown fuse. Replacing the fuse should fix the problem.

If the subwoofer is not turned on, then the problem could be a loose wire or an incorrectly installed speaker. Check all of your connections and make sure everything is secure. If you’re still having trouble, you may need to consult a professional car audio installer.

9. sub cuts out when the bass hits:

If your car’s subwoofer cuts out when the bass hits, there are a few things you can do to try and fix the problem.

First, check to make sure that all of your connections are secure and that there is no loose wiring. If everything looks tightened down and in place, then the next thing to check is your amplifier.

Make sure that it is properly connected to your subwoofer and that the settings are correct. If you’re still having trouble, you may need to Consult an expert or take your car to a professional for assistance.

10. car subwoofer humming when off:

If your car subwoofer is humming when it’s off, the most likely culprit is a problem with the grounding wire. Make sure the wire is securely attached to the subwoofer and to a metal ground point in your vehicle. If that doesn’t fix the problem, you may need to consult a professional automotive electronics specialist.

1. how do define the Best Subwoofer Brands?


Firstly, you’ll want to look at the reputation of the brand. Are they well-known for quality products? Do their products tend to outperform competitors’ products?

Secondly, you’ll want to look at pricing. Are their products reasonably priced?

Finally, you’ll want to take a look at customer testimonials and reviews. Are customers happy with the products they’ve purchased?

With all of these factors in mind, here are a few brands that we consider to be among the best

final words:

While it is beyond the scope of this article to go into detail on every possible car subwoofer issue, we have tried to provide a comprehensive guide that will help you troubleshoot and fix common problems.

If you are still experiencing issues after following these steps, please feel free to reach out for more assistance. We hope that you now have a better understanding of how your car subwoofer works and how to troubleshoot any potential issues. Thanks for reading!

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