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How Do You Use an Audio Control Epicenter?

Like any other element of the car sound system, Epicenter must have a proper setup to function correctly.

The Audio Control Epicenter is a bass processor that uses patented technology to accurately recreate the missing bass into the original signal level, but how should you use the Epicenter correctly? Let’s find out. 

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Generally, the Epicenter has to be connected between the car stereo and the crossover and the amplifier because to function correctly, it has to receive a full range signal. When connected, two bass controls, the “sweep” and the “width,” must be set to the level matching the music type and the subwoofer’s enclosure.

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Tip: Connecting the Epicenter requires purchasing a separate power, ground, and a remote wire which should be ideally 16 or 18AWG. There is no need for the thicker wires because the Epicenter does not draw much current like the amplifier.

You will also need the RCA signal wires to connect with the car radio and the crossover or amplifier.

The wires I use are from Knukonceptz, and I am happy with their flexibility and solid quality.

In the article below, I will detail the Epicenter’s functionality and explain its correct setup for the best audio experience.

How to Receive the Signal to the Epicenter?

The inputs on the Epicenter are designed to handle signals with voltage up to 15 volts, allowing for a clean, solid signal that is noise-free at the end.

The Epicenter is equipped with a control knob that allows quick bass adjustment by turning the knob either up or down.

Because the acoustics inside every vehicle is different, the Epicenter is also equipped with two base controls, the “sweep” and the “width.” 

Adjusting these controls allows you to fine-tune the Epicenter’s functionality and optimize performance individually to the vehicle type, your needs, and the music type.

The sweep control allows you to choose the center frequency, which is the most affected by the subwoofer type, and it varies from 27 Hertz up to 63 Hertz.

The “width” allows you to control the shape of the filter around the centered sweep frequency. In other words, it makes boosted frequencies broader or narrower around the main frequency selected by “sweep.”

What Does an Epicenter Do for Car Audio?

The Epicenter is the crucial element in many professional car sound systems. It maximizes in-car ultra-low frequencies, which provides an incredible punch and impact of live music.

For car audio, it means stronger and louder bass, but it does not boost the bass. It restores it.

Epicenter is filling the gap from the equalizer that does not work in such low frequencies.

The Epicenter is a device that controls bass frequencies and delivers clean and precise sound during each music session.

Car Epicenter allows car owners to enjoy much cleaner and deeper bass in their cars, dramatically improving car stereo systems’ performance.

With a car audio system boosted up to significantly higher output potential, you can finally hear your music at its best when driving.

Do I Need an Epicenter?

Many musical recordings lack bass as it is removed during the production process because standard speakers or earphones cannot reproduce it in typical sound systems.

But, when we improve our car audio systems by adding more powerful subwoofers, speakers, and amplifiers, we need to restore that bass in the musical signal to its original level.

The audio control epicenter is a bass processor that uses patented technology to accurately recreate and inject bass into its original signal path.

It analyzes the music to look for information in higher-order harmonics to recreate the missing signal.

This means that this device isn’t just boosting bass, but it is actually wholly recreating it for accurate high fidelity low-end output.

Where Should I Put My Car Audio Epicenter?

There are two types of epicenters, and depending on their design, they can be installed in different places.

You should place the Epicenter close to the signal source, the stereo, but they are often mounted in the vehicle’s rear as close to the amplifiers as possible.

The INDASH Epicenter on the other hand, has been designed to be installed close to the dashboard.

Regardless of where you place either Epicenter, it needs to be placed in the signal path as close to your source unit as possible and connected before any crossover or equalizer.

The best place for a car audio epicenter is behind the front seats or center console if possible, but the easiest installation is close to the amplifier in the trunk.

Remember that you do not want to remove it so often, and to be able to make easy adjustments, I do not recommend installing the Epicenter in small tight places where it may be difficult to set up.

How Does an Epicenter Connect to an Amp?

Connecting the Epicenter with the amplifier is not difficult, but you must remember that it has to go between the amplifier and the stereo.

You need the two RCA signal wires for signal transfer from the radio to the Epicenter and then further to the amplifier to make the connection.

If the amplifier does not have a built-in crossover, you will need to add one to the circuit for precise frequency distribution and amplify only the required frequencies.

The idea behind connecting the crossover after the Epicenter is because the more full signal you send to the Epicenter, the better it will perform and the more precise signals it will restore.

how to connect car audio epicenter with amplifier
Connecting Epicenter with the Amplifier (incl. Equalizer) – source – Audio Control

After restoration, you want to send to the amplifier only the signals you want to amplify, and in the case of the subwoofer, these are only the lowest bass tones, so the crossover should be set to around 80Hz.

What Should the Sweep Be Set to on Epicenter?

The “Sweep” knob on the Epicenter’s right side allows you to pick the center frequency that you want The Epicenter to maximize the bass restoration, and this should match the peak frequency to which your subwoofer enclosure was designed for.

The adjustable frequency range is between 27 and 63 Hz starting from the left side.

Most subwoofers have the “sweep” set in between 36 and 42Hz, but again, this is an enclosure specific from the design perspective.

You can also make some adjustments based on the music type you listen to or the size of your vehicle if you want to reduce or increase the frequency, but the starting point should be the factory’s suggested value.

When it comes to the bass loudness, a slightly higher frequency can actually be louder.

Below there are a few examples of the specific subwoofers with the starting settings:

As you can see, the bigger the woofer size, the lower frequencies it should work with.

Why Does My Epicenter Make Noise?

Noise coming out of the Epicenter is not common, but you may start hearing the whining noise, often caused by ground connections within the car sound system.

The solution for this is to adjust using the Ground Isolation feature.

Ground Isolation in the Epicenter makes alternative grounding connections, and it reduces the whine effect that may occur when the source unit and amplifier use different grounding.

Remember that before making any adjustments to the ground isolation settings, make sure the audio system is turned off.


Epicenter works by analyzing the music to look for information in higher-order harmonics to recreate the missing signal and is essential especially for the music not heavily loaded in the bass in the first place, like a rock, for example.

What this means is this device isn’t just boosting bass but actually completely recreating it for true high fidelity low-end output.

Installation for the Epicenter is simple. It needs 12-volt power, the ground, and the remote wire.

The Epicenter has to be connected between the amplifier and the car stereo or another signal source.