How To Fix One Speaker Working On Car Stereo


If you have noticed that one car speaker has stopped working all of a sudden and the others remain fine, it could be that the car speaker is blown. Its very unlike this is the case because there could be other reasons to why this car audio problem has occurred. We had a customer come into our car audio shop the other day that installed a set of brand new Alpine type X component speakers. The speakers were fine it was some settings that needed to be altered on the stereo. Due to it being a simple fix we didn't charge the customer for this repair, so that is why i want to share some quick tips and tricks to get your one speaker working again on your car stereo.


1) Ensure that the fader setting is placed evenly in the middle. Basically a fader control allows you to make the sound louder or quieter controlling the front and rear speakers. If the sound is faded more towards the left, the right speakers will not work and be as loud as the other side. So ensure that the fader setting on the car stereo is placed equally from both sides. This is a common mistake that most people don't relise and automatically assume that the speaker is blown or damaged.


2) Check the speaker wire. Each speaker in your car has its own unique wiring going back to either an external amplifier or a CD player. The speaker wire can sometimes come off the terminals found on the back of the speaker, due to strong vibrations created from any bass. Also heat created from electronics in the car can make the insulation tape wrapped around the speaker wires come out if its being used on the wiring loom causing shorts to occur.


3) The crossover over could be faulty (Only Applies to component Speakers). This is a little box that is connected inline with the speaker and tweeter. It has the exact role to provide separate frequencies to each speaker in the car audio system to provided superior sound quality and clarity over regular coaxial speakers. Sometimes water can get inside the crossover box from the window being left opened for long periods of time or the components inside can mechanically fail at some given point. To test a car audio crossover box for faults, you should switch it over with the one placed on the side thats working to determine if it needs replacing.


4) The channel that provides output to that one speaker could be damaged. This can vary rarely occur but in some instances it is possible if wires touch each other when the car stereo is powered on or if a mosfet transistor is damaged due to overheating problems. To check if the channel is blown on the car amplifier, test it with the working speaker by switching it over. If there is no sound from that speaker, however there was sound coming from the other channel it was currently connected to then its a fault with the amplifier.


5) The speaker could be damaged. Inside there is a voice coil placed in the middle that allows the speaker to create sound from the movement created. This can get damaged from overuse or abuse such as overpowering it or playing music at high clipping, distortion levels at high volume levels. To test if a speaker is blown, you can use a Multimeter reader tool by setting it to ohms and placing the probes onto the terminals found on the driver. If you get readings of around 1.0 ohms the speaker is fine, if you get readings that are infinite ohms, you can confirm clearly that the speaker is blown.
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