How To Install Aftermarket Car Amp To Factory Stereo

how to install aftermarket car amp

If you want to learn how to install aftermarket car amp to factory stereo you will need to purchase an additional car audio accessory called a line out converter adapter. This will allow you to add RCA outputs to your factory radio to add an amp. This is a good solution if you don't want to replace the stock radio with an aftermarket part due to the increased amount of costs. Adding a subwoofer to a factory stereo is fairly easy once you have installed the line output converter. How a line output converter adapter works it takes the signal from the rear speakers of your car and converts it into a low level signal to be feed into your car amplifier. The job of the adapter is to downsize the output signal created from your factory radio. Without, this you would damage your car amplifier inputs.

The first step on how to install aftermarket car amp to factory stereo is to remove it from the vehicle’s front dashboard. Depending on your vehicle you may require special car stereo removal tools to remove it. You could use objects like a flat screwdriver, but you don't want to damage the outer plastic of it. Sometimes it worth spending that extra $10 on the correct car stereo removal tools. 

Once you have removed the factory radio from the slot, you will need to identify which wires are responsible for providing the signal to the rear speakers of your car. In most cases, the left rear speakers are green colour and the right rear speakers are purple colour. However, depending on the make and model of your vehicle they could use different colours and not the industry standard headunit wiring. 

Once you have identified the two sets of rear speaker wires cut both pairs into the middle. So, you should have four wires in total, two for the left rear speakers and two for the right side speakers. Now you will need to connect these directly into the line out converter box. It will be marked on there regarding how to connect them. If not just do an internet search for the make and model of the one you have purchased and you will find some information about it, car audio forums are a good place to start. Remember the speaker wire with the stripe in the middle is also negative and the one with no stripe just coloured is positive.

Once you have made the relevant connections using soldering and heat shrink you will need to run a high quality RCA cable from the front of the car into the location of the car amplifier is installed. Connect one end of the RCA cable matching colours into the line out converter adapter and the other end into the signal inputs of the car amplifier.

You will notice that there will be a blue wire from the line out converter adapter. This is called the remote out which tells the amplifier when to turn on and off. You want to connect the blue remote wire from the car amplifier to the blue wire found on the line out converter adapter.

Adding a subwoofer to a factory stereo is fairly simple once you have installed the line output converter amp adapter. You don't always require a fancy expensive aftermarket headunit to have a powered subwoofer in your car.

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