How To Tell If A Car Speaker Is Blown: Diagnosis, Causes And Solutions

How To Tell If A Car Speaker Is Blown: Diagnosis, Causes And Solutions. In this video tutorial I will show you how to tell if a car speaker is blown.

Here is how to do it;
Listen
Listening is the first and easiest way to tell if a speaker is blown. Stop the car and block out any other noises that could be a distraction. A completely blown speaker will not produce any sound no matter how high the volume is. Distorted audio or deficient volume indicates a partially blown speaker. If you detect strange noises such as crackling, hissing or popping, these are clear indications of blown speakers.

Touch
If you suspect that your car speaker is blown, turn it on and touch it to feel for some vibrations. Normally, a fully functional speaker produces vibrations when it operates. Therefore, if the volume is up and no vibrations are coming off the speaker, it means that no sound is being created and thus a blown speaker.

Isolate
Typically, a car has several speakers. Sometimes, only one of the speakers could be blown while the others are still operational. One blown speaker could disrupt the entire sound system of the car. Using the fader system in your car that controls the speakers, focus the sound on one side. Listen keenly to the sound produced to identify whether it is normal, distorted, static or strange to diagnose the blown speaker or speakers properly.

A multimeter tester.
A blown speaker has infinite impedance. This is tested using a multimeter tester. With the speaker turned off, set your tester to Ohms and touch the lead of the multimeter to the speaker terminal to test the electrical function. A reading of infinite indicates that the speakers are blown.

Some of the causes and solutions for a blown speaker are:
Signal problems
When the signal to the speaker is bad or distorted, it sends erratic electrical impulses into it.

Physical damage to the speaker
The cone and the diaphragm are very sensitive parts of the speaker. Excessive pressure to the diaphragm, a punctured cone or any physical or mechanical damage lead to the blowing of the whole speaker.

Overpowering the speaker
An overpowered speaker means that the power that is going into it, is more than it can handle. If you have your speaker on too high volumes for an extended period, an over-power is likely to occur.

Thermal overload
Heat is a major cause of a speaker blowing. Anything exposed to high heat levels will potentially develop problems. When exposed to high power levels, overheating will occur, which would in turn cause melting of the voice coil and a long-run effect of speaker damage.

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