Line Output Converter Wiring Diagram: A Complete Guide

When it comes to upgrading your car’s audio system, adding an amplifier is one of the best ways to improve the sound quality. However, amplifiers require a line-level signal, which means that you need a line output converter (LOC) if your car’s factory stereo lacks preamp outputs. In this article, we will discuss the line output converter wiring diagram, how to install it, and some frequently asked questions about LOCs.

What is a Line Output Converter (LOC)?

A line output converter (LOC) is an adapter that allows you to connect an aftermarket amplifier to a factory stereo system that does not have preamp outputs. The LOC converts the speaker-level signal from the factory stereo to a line-level signal that the amplifier can use. The line-level signal is a low-voltage, high-quality signal that is free from distortion and noise, allowing the amplifier to deliver clean and powerful sound.

LOCs come in different types, such as passive and active. Passive LOCs are simple adapters that do not require power and are usually cheaper than active LOCs. Active LOCs, on the other hand, require power and offer more control over the output signal, such as adjustable gain and frequency response.

Line Output Converter Wiring Diagram: How to Install an LOC

Installing an LOC is a simple process that anyone with basic car audio knowledge can do. Here are the steps:

Step 1: Gather the Necessary Tools and Materials

You will need the following tools and materials:

Tools Materials
Screwdriver set Line output converter
Wire stripper/cutter Speaker wire
Crimping tool RCA cables
Tape or zip ties Fuse holder and fuse

Step 2: Disconnect the Car Battery

Before working on your car’s electrical system, always disconnect the negative terminal of the car battery to prevent electrical shocks and damage to the components.

Step 3: Locate the Factory Stereo and Speaker Wires

Locate your car’s factory stereo and speaker wires. You can use a wiring diagram or a multimeter to identify the speaker wires. The speaker wires are usually color-coded, but some cars may use stripe patterns, so it’s essential to test them with a multimeter.

Step 4: Connect the LOC to the Speaker Wires

Connect the speaker wires from the factory stereo to the input wires of the LOC. You have to strip a small section of the wire insulation, twist the exposed wires together, and crimp the connector to secure them. The LOC should have a wiring diagram that shows which wire is for the positive and negative signals.

Step 5: Connect the RCA Cables to the LOC

Connect the RCA cables to the output wires of the LOC. The RCA cables will carry the line-level signal from the LOC to the amplifier. The LOC should have two outputs, one for the left channel and one for the right channel. Use the same color for each channel to avoid confusion.

Step 6: Connect the Power and Ground Wires of the LOC

The LOC requires power and ground to work. Locate a nearby power source, such as the fuse box, and connect a wire from the positive side of the battery to the fuse holder and then to the power input of the LOC. Connect a wire from the ground point of the car to the ground input of the LOC.

Step 7: Reconnect the Car Battery and Test the Sound

Reconnect the negative terminal of the car battery and turn on your car’s stereo system. Adjust the gain and frequency response of the LOC and the amplifier to match your preferences. Test the sound to make sure that everything is working correctly.

FAQ: Frequently Asked Questions about Line Output Converters

Q1: Do I need a line output converter if my factory stereo has preamp outputs?

No, if your factory stereo has preamp outputs, you can connect them directly to the amplifier without the need for an LOC.

Q2: Can I use an LOC if my car has a factory amplifier?

Yes, you can use an LOC with a factory amplifier. You need to locate the speaker wires that go to the amplifier instead of the stereo and connect them to the input wires of the LOC.

Q3: How do I know which wire is the positive and negative signal?

You can use a multimeter to test the wires or consult the wiring diagram of your car. The positive wire usually has a positive voltage, and the negative wire has a ground or negative voltage.

Q4: Can I use multiple LOCs for multiple amplifiers?

Yes, you can use multiple LOCs for multiple amplifiers. You need to connect the speaker wires of each channel to a separate LOC and then connect each LOC to its respective amplifier.

Q5: Do I need to fuse the power wire of the LOC?

Yes, you need to fuse the power wire of the LOC to protect it from short circuits and overloads. Use a fuse with the appropriate amperage for your car’s electrical system.

Conclusion

The line output converter wiring diagram is a crucial aspect of installing an LOC for your car’s audio system. Follow the steps and precautions we’ve discussed to ensure that your installation is safe and effective. With the right tools and knowledge, you can enjoy the benefits of a high-quality audio system in your car without breaking the bank.