If you have subwoofers installed into your vehicles trunk and there is no bass playing from them, its not always the amplifier that is the problem. There can be many different things that are associated from stopping your car subwoofers to not work at all. First of all, today i am going to explain how a car sub works in a audio system to give you a better understand. Music signal is sent down the RCA cables coming from the car stereo into the amp. The amplifier then processes this into a higher output signal to power the subwoofer. Anything that is required to make this work can interrupt this process and stop it altogether. On a daily basis, we get many customers that have got an existing audio system installed with a subwoofer that has come into the shop because it has stopped working. Our expert and highly trained car audio technicans have the best advance skills that can help troubleshoot this kind of problem and thanks to this website we can now provide them to you without any cost.
If there is no power going into the amp:
1) Is the car amplifier on? Check if the power light is on, if its off its not getting power this could be caused by a blown fuse, loose power wire or a faulty amp. Its best to use a multimeter tool to read if the red power cable is supplying the 12 volts it requires to power on. It could also have placed itself into protect mode if there is a short taking place.
2) The remote wire may not be connected. This is a small blue wire that tells the amp when to turn off and on. For example, when you switch on your stereo on it will send a signal to the circuit inside to trigger it to come on.
3) Not properly grounded. This is a thick black wire that is mounted to the cars chassis, basically anything that is good enough to be bear metal. The ground terminal could have got loose with the vibrations or corrosion could occur. So its best to check this and ensure that you sand down the area to ensure a good solid connection.
If there is power but there is no sound coming from your connected subwoofers:
1) It may be muted. Sometimes on the audio settings found on the car stereo you can accidentally turn off the sub. Recheck if this setting exists on your CD Player as it is a common mistake that we have noticed that is not picked up at all by the customer and straight away think there is a hardware fault.
2) Check the RCA cables. These are used to send down music into the amp, if they are not connected or loose slightly the bass going to stop playing. One end of the RCA cable should be connected into the 'Sub OUT' on the back of radio and the other end goes into the input of the amp.
3) The gain could be turned to low. This is used to help match the voltage that is provided down the RCA cables with the amplifiers circuit. Some use this as a volume control to make the sub louder or turn it down a little. So check this setting as you might have turned it down too low when you was at a point of fine tuning your system for the best sound quality.
4) Speaker wire not connected. The speaker wire can become loose from vibrations if its not securely connected in the first place. This is common for subs because they tend to play more bass, creating more chances of something shaking or coming off. So check if the speaker wire from the amp to the enclosure box terminals is secure. Also check inside by unscrewing the sub from the box to see if the speaker wires attached inside that connect the basket to the back of the terminals is connected.
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