How to Connect an Equalizer to Car Stereo

How to Connect an Equalizer to Car Stereo

Connecting an equalizer to a car stereo may be a hard task. But you can do every step slowly, then voila! You got things in the right place and hooked them up successfully.

Numerous wires can be challenging. Some equalizers are designed to be placed in the dash. Some may also be placed below or above the head unit. 

It’s recommended to put it in a place where you can easily access it to adjust the sound. The following steps will walk you through until you can get things done.

But you need to know the tools that you should use.

Why Do I Need to Add an Equalizer to my Car Stereo?

1. To customize music

If you want to pull back the treble and the bass to be more prominent as you listen to a lot of electronic dance music, you would surely need an equalizer.

2. More options

Many head units allow mid-range adjustments, treble and basic bass. An equalizer can offer you more options too.

For example, the equalizer can provide less bass, more bass, more treble, and more. 

3. Melt the distracting sound

There are unwanted sounds generated by other vehicles on the road. It can affect the sound of your audio system.

An equalizer is a solution.

4. Improvement for the Factory System

Even though you have a high-end stock system, you can make the sound crisper and clearer with equalizer. 

5. Protection for Audio System

Although the equalizer can provide higher and clearer volume, it doesn’t tax components like speakers that only handle certain levels and tones of amplification. 

Tools and Supplies for Hooking Up Equalizer

  • l Set of socket and drive ratchet (1/4-inch)
  • l Nut drivers set
  • l Wire crimpers
  • l Wire strippers
  • l Screwdrivers set
  • l Assortment of wiring connection
  • l Electrical tape
  • l 16 gauge red and black wire
  • l Test light or volt ohmmeter

Steps to Follow when Connecting an Equalizer to a Car Stereo

1. The Right Location for your Equalizer

The things you should consider are adequate space and the area that it can look at its best. You can think of what you want, but it’s wise to deliberate the easy access whenever you want to control the sound. 

So you can think of other areas.

2. Running the Main Electrical Wiring

You can try to run the main power wire after you mounted your equalizer to its rightful place. The main power is made of a 16 gauge red wire or the fuse panel in the switched power wire. 

A test light is also needed. If you only like the equalizer to turn on when the key is on position, you have to determine a power post that only bears the power when the key is on.

Connect your main power wire of equalizer to the post.

3. Running the Main Ground Wire

It’s time to find a place for your main wire when you’re done hooking up the main wire. It’s best to mount this on a metal surface and not plastic.

Tips When Connecting an Equalizer to a Car Stereo

  • Enough space is necessary when mounting the equalizer.
  • Before drilling the holes, try to fit it first.
  • The power output in the fuse panel can activate the main power wire of the equalizer.
  • It’s important the ground wire is mounted properly, and it should be on the metal base.
  • When the power and ground wires are connected, you can install the equalizer.

4. Connecting the Equalizer to the Car Stereo

This step will require you to plug in the RCA jacks. They’re from the head unit of the main stereo, and they proceed to the equalizer.

To put the number of wires in place, alternate them over the other. 

Kinds of Equalizer

1. Analog Equalizer

It has physical dials or sliders so you can control settings of frequency. 

2. Digital Equalizer

You can adjust the audio system with precision by a menu screen. It enables you to save multiple settings.

It’s conducive for people who listen to different music genres. It requires different settings. 

3. EQ Booster

It works as an equalizer and an amplifier at the same time. It tends to be weaker than the performance of an external amplifier.

If you don’t want to buy a separate equalizer and an amplifier, you can get this, and it can save you money. 

4. Graphic Equalizer

It features a graphic representation so you can adjust the frequency band of the audio system. It has sliders and auto filters that allow you to change the sound by moving the buttons up and down.

The left side is the low or bass side, while the right side of the equalizer is the treble and high side.

5. Parametric Equalizer

It’s a step ahead of the conventional equalizer. You’ll be able to control center frequency, boost levels, or widths. 

You can also choose a focused boost or a further sweeping one around 35, 45, 65, or 80 Hz.


You may need to hook up some wires, but you only need to do it carefully. Double-check if you have crimped all the connectors to the wiring properly. See to it that the wiring is with the appropriate connectors. 

You should make sure that you plugged the RCA connectors to the correct ports, and you’re ready to go. 

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