How to Test a Car Subwoofer

How to Test a Car Subwoofer

Car subwoofers are a great source of a sound, giving an extra bass you will always like. When your subwoofer does not function well like it used to, you don’t need to throw it right away. Since there are possible ways why your car subwoofer is not doing well, here are the few possible problems you may consider. 

All About Car Subwoofers

First off, what is a subwoofer, and how does it work? When you see cars producing such great sound and bass, they might be using more than a plain speaker; they might be using a subwoofer. A subwoofer may look like a speaker, but it is more than that. It is a complete amplifier producing both bass and sub-bass. Nothing produces low pitched-frequencies to mid frequencies like subwoofers do, which is why it is one of the favorites of many. 

Possible Reasons Why Subwoofers Stop Working 

There are many possible reasons why subwoofers stop working. Before talking about it, you need to know the main parts of this great thing first. 

Like common speakers, subwoofers have a cone, which usually ranges from 8 to 21 inches. It has a cabinet or a driver, small divers, coil, and many more. Knowing what the parts of subwoofers are will help you identify possible problems. 

Cone Seal Damage

The ability of all woofers, which include a subwoofer to produce a sound, is because the air can move through a specific frequency. In order to do this, cones of subwoofers are positioned back and forth so that it will push and pull the air. This cone is covered by a certain type of materials which, when it is damaged, permits the cone to move out but, it now becomes unable to move the air properly to the spaces it intends to move. 

Driver Magnet Problem

The cones of all woofers and subwoofers are attached to a certain permanent magnet, but note, this is not an electromagnet. It is found in the cone’s bottom part and placed close to the coil wire, which acts as an electromagnet. The so-called “electromagnet” repelled and attracted by the real and permanent magnet. As it drives the cone, the sound is produced.  When there are broken parts in the permanent magnet, magnet poles, and electromagnet interaction changes. This sometimes causes even sounds or will not produce sound properly. 

The Possibility of Short Circuit

Did you know the short circuit is the most common cause why many speakers fail? When there is is a short circuit found in the wire, the signal is prevented from reaching the subwoofer. On the other hand, if the terminals encounter short-circuit, it prevents both current and signals from reaching the subwoofer. 

Power Shortage 

Another possible reason why your subwoofer is not working well is a power shortage. When the power amperage that reaches to the magnetic coil is short and not enough, the strength of the electromagnetic field is not enough for successful interaction with the permanent magnet. 

Testing your Subwoofer 

If you are already a pro about subwoofers, maybe you can easily identify existing problems about it. However, it is not easy to do so. In order to test your subwoofer, you can apply this method for easy checking. 

First off, remove the subwoofer’s cover and play the audio system of your car. Check the cone if it has damages because sometimes, problems are found in the cone alone. If the cone is doing fine, try pressing the center part. Listen carefully to the sound is there are rattles. Rattling noise might be caused by a blown coil. You may also connect the subwoofer to a battery with 9 volts if it gives an accurate response. 

Identifying underlying problems with your subwoofer is not a complicated task which anyone can do. If it is your first time doing such a thing, you may ask the help of someone you knew who already has an idea on subwoofer checking to avoid the possibility of more damage. 

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