AudioControl EQS (Gray)

6 Channel Trunk Mount 13-Band Graphic Equalizer with 5-year warranty*!


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This item has been discontinued

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AudioControl EQS - Black

OUR PRICE: $249.99

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For over two decades, AudioControl has been designing and manufacturing award-winning autosound products at our factory located in the rainforests of the Pacific Northwest. During this period, countless sound-off winning contestants have chosen AudioControl products to give them the competitive edge. "Can you really win without AudioControl", was part of an article written commenting on competition winning systems. Nothing sounds better than an awesome recording played back on a kickbutt system. Unfortunately, the acoustics of your vehicle can take away from your systems performance. While AudioControl products do not change the laws of physics (although they act like they do), autosound enthusiasts have long known that AudioControl products "make good stereo sound better"

EQS - 6 Channel Trunk Mount Equalizer

Great sound for six channels, all in one unit. Separate inputs and equalization for front, rear, and subwoofer speakers. The EQS has seven bands of full and half octave equalization control for the front and rear plus six, one-third octave equalization bands for maximum bass control. Add to that the Programmable Frequency Match (PFM) filter and a low output impedance line driver and you get maximum output and sonic clarity everywhere in the car. And to easily use a factory head unit, the EQS has built-in speaker level inputs. Truly a product for those who consider perfection possible.

Key Features:

Dual Bandwidth Equalization:

The EQS has 40 bands of AudioControl's award winning dual bandwidth equalization for total sound control. With the EQS, you have six, one-third octave equalization controls for the subwoofer plus seven, full and half octave equalization controls for both the front and rear channels.

Separate Front, Rear, and Subwoofer Inputs:

The EQS has six channels of input and six channels of output to provide a simple interface with today's multi-channel systems. By combining the sonic performance of AudioControl processing with the bells and whistles of a multi-channel head unit, you get maximum performance - using only one component. In addition, a unique switching system actually senses if connections are present at the subwoofer inputs of the EQS. If only four channels are being used, the EQS switches the subwoofer equalization automatically to the rear channels.

Maximize Your Bass Performance:

Optimum output of your performance sound system requires every component and speaker operating in an ideal environment. The AudioControl PFM (programmable frequency match) circuit gets the maximum output from your low frequency speakers and protects them from non-musical subsonic information. This programmable subsonic filter provides an 18 dB/octave high pass filter for your subwoofer or other low frequency speakers. The PFM is the ultimate tool for tuning subwoofer enclosures.

High Voltage, Low Impedance Line Driver:

Like other AudioControl products, the EQS has a 13-volt, low output impedance pre-amp line driver. This means the EQS can dramatically increase the pre-amp signal level from your source unit and deliver it downstream to the amplifiers. Higher signal voltage means maximum output, sonic clarity, and the ability to drive multiple amplifiers!

Easy Interface with Factory Installed Systems:

The EQS lets you easily add aftermarket amplifiers to factory installed source units via a built-in 4-channel active speaker level input adapter. Different than most speaker level adapters, there is no loss in fidelity when using AudioControl's design. In addition you can even continue to use your fader.

AudioControl EQS Features

  • 13-Band Graphic Equalizer
  • Six Inputs and Outputs
  • Dual-bandwidth Equalization
  • Auto-mode Configuration Simplifies Installation
  • Programmable Frequency Match (PFM) Subsonic Filter
  • Speaker Level Inputs - Can Accept 400 Watt Signals!
  • Balanced Line Level Inputs For Superior Noise Rejection
  • Input and Output Level Matching Controls
  • Built-in Line Driver
  • Front / Rear / Sub Fader Compatible
  • 13 Volt Signal Compatible
  • Output Voltage Display
  • Color: Gray
  • Also available in White: AudioControl EQS (White)
  • Weight: 3.25 lbs.
  • Dimensions: 8.8" W x 9.3" D x 1.3" H
  • Authorized Dealer
  • 5 Year Manufacturer's Warranty (*when installed by an authorized AudioControl dealer)

EQS Specifications

  • Maximum input/output level: 9.5 Vrms/13.5 Vpeak
  • Input/output channels: selectable: 4 or 6 channels
  • Input gain: ± 18 dB
  • Frequency response: 0Hz-100kHz ± 1dB
  • Equalization center frequencies:
    • 31.5, 40, 50, 63, 80, 100, 120,160, 250, 500, plus 1k, 2k, and 10k Hz
  • Total harmonic distortion: 0.003%
  • PFM subsonic filter slope: 18 dB/octave
  • PFM frequency: programmable 15 to 100 Hz (Factory shipped @ 33 Hz)
  • Signal to Noise ratio: -110dB
  • Balanced input noise rejection: >60dB
  • Input Impedance: 20 K ohms
  • Output Impedance: 150 Ohms
  • Power supply: High headroom PWM
  • Power draw: 500mA
  • Recommended fuse rating: 2 Amp

Check out the AudioControl EQS Owner's Manual

Product History:

AudioControl EQS-BlackBlue thumbnail
(newest, current model)
AudioControl EQS-Gray thumbnail
(previous model, replaced by AudioControl EQS - Black)

Equalizer Specifications

Type of Equalizer
This determines the way the equalizer processes the signal from the source unit. A parametric equalizer allows to you adjust the center point of the frequency band you are adjusting as well the bandwidth which can be narrowed or widened. A graphic equalizer has fixed frequency bands and bandwidth and only the frequency bands can be adjusted. A digital equalizer uses a software program to tune your system.
A graphic equalizer typically has more adjustable bands and is less expensive, whereas a parametric will have fewer bands but offer a greater level of control and provide more tuning options. Digital equalizers will tune your system with the most detail and precision but require a computer and are typically a little higher in price.
Equalizer Bands
The number of graphic or parametric equalizer bands the receiver has. The better the EQ, the more likely you will be able to "tweak" your sounds to your desire.
13 band
Equalizer Frequencies
The frequency range that allows control of the center frequency of each equalization band.
31.5 - 10,000 Hz
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Built-in Bass Reconstruction
Bass reconstructors, or bass enhancers, improve low frequency reproduction in a car audio system with at least one subwoofer. These bass expander products will help your subs produce accurate bass thumps.
Line Driver
A line driver is a small amplifier used to support the strength of the audio signal coming from the source unit.
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Total Number of Inputs
This is the total number of input connections that go into the unit.
Total Number of Outputs
This is the total number of output connections that the unit will produce.
Max Output Level
The maximum level (in volts) of signal output. A higher level will increase the clarity and boost your signal.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
0 - 100,000 Hz
THD (Total Harmonic Distortion)
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
-110 dB
The width of the item from left to right (side-to-side) measured in inches.
The height of the item, measured from top to bottom, in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.

Warranty and Return Policy

Parts Warranty Duration
5 years
Labor Warranty Duration
5 years
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating




July 12, 2009

The EQS in my opinion is a must have for anyone who truely loves car audio. With the three separate inputs and built in line drive you can't miss. Audiocontrol in the #1 brand when it comes to crossovers and EQs.

9 of 11 found this helpful

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Kyle, TX

Audio control

September 19, 2013

I needed more output from my radio and more control of my sound. I auditioned several units, but Audiocontrol EQS won. This unit has great voltage out to my amps (tons of clean headroom) and awesome eq adjustability. Pick one up today, you won't be disappointed.

8 of 10 found this helpful

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keller, TX

Great product!

April 27, 2009

The audiocontrol eqs offers independent front, rear, and sub equalization as well as being a line driver which allows the input sensitivity or gain on the amps to be turned to their lowest setting. The graphic EQ is easy to understand and tune with and the line drivers work well. I feel this unit is second only to the speakers in the overall sound quality of my system and would make a great addition or stand alone equalizer in most every enthusiasts audio system.

8 of 10 found this helpful

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Big D


Audio Control to the rescue.

September 30, 2013

Over the years, I have run with many different car audio companies. When I first got into Car Audio (1990), I wanted to try everything on the market. I soon found out that there are certain items to stay clear from, and others that you need to have in any of your setups.

Audio Control is one of the companies that I simply can not do without. I remember my first product from them back in the day. The Epicentre. What A mind blowing processor. I had a pair of 15" subs being run by a classic Phoenix Gold M series amp. Those things pounded out 145 without much effort.

Today I am reviewing the Audio Control EQS. I ordered it a couple of weeks back and just installed it this past weekend. Man, what a huge difference. Cleans up the signal, strengthens it, and give me control of how much of it goes where.

I was in love with my new system before I ordered the EQS. I also knew how much more I would be in love with it once I installed the EQS. Worlds apart in difference.

I am able to run high output without needing to raise the gains on either Amplifier. I brought my car into my local Audio Control dealer and had them tune the car. My car sounds mint. so much definition in my front sounds stage and my rear fill sounds perfect. I would recommend Audio control gear to anyone that wants to have their already sweet system go to the next level of Awesome!

7 of 9 found this helpful

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dont leave home without it!!!!!

June 26, 2009

this is the best eq i ever had. my friends dont recomend using eq s in their sound systems but i have always used them and this one is perfect .i brought it tuned it an hid it in the trunk and all my friends always ask me how i get my system to sound so clear but i dont tell them i just laugh. this unit is a must have for any car audio system .if u think your system sounds good now you havent heard anything untill you get one of these. this is mony well spent!!!!!

7 of 9 found this helpful

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barksdale afb, LA


January 24, 2008

If you want to make your music a little more lively i would recommend this. I added it and I love it. I have more control than ever.

7 of 9 found this helpful

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St Thomas, VI

Super product

September 12, 2010

Stronger signal is the way to go. Must have product. Who says you can't be loud with less speakers.

6 of 8 found this helpful

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Accessory Tools and Products

Accessories added

NVX XWS1625 25 ft. of 16 Gauge Speaker Cable/Wire

25 ft. of True Spec 16 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

Your Price $17.99

Browse 3 questions and 5 answers
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Why did you choose this?
Sonic Electronix Store
To go with the 6XS and the epicenter to control the 2 Orion cb2500.1 and the 400x4 kenwood. That power the 2 Skar VVX-10 D2. The 2 Skar EVL-12, and the 4 Rockford fosgate P1572.
Paul D on Aug 22, 2017
Audio control makes quality products to get great sound while keeping your factory head unit. I already have an lc7 which works flawlessly. Im buying this to have more control over the sound and fine tune my system.
john o on Nov 25, 2016
It fits what I'm trying to accomplish
Antonio S on May 5, 2017
Hey guys, my head unit only has one rca output, I am currently running 3 amps, sub amp, front amp and rear amp. Is this unit comparable to the matrix plus where I can plug my one input and have 3 outputs? I like the EQS over the matrix because of the ability to have the equalizer with the line driver, I just want to make sure the EQS will hook up the same way as the matrix plus. Thanks
john k on Nov 26, 2015
Best Answer: Hi John,

Unfortunately , "Auto Mode" only works for the Subwoofer output of the EQS.
Reply · Report · Rick MStaff on Nov 27, 2015
· Add Answer · I Have This Question Too (1)
Does this unit come with a PFM filter installed from the factory? If so, which one?
A shopper on Sep 30, 2016
Best Answer: Thank you for the recent inquiry!

After researching this specific product, unfortunately we don't have the necessary information to assist you. Due to the limited information at our disposal, we're not in the position to provide you with the answer you're seeking. Therefore we invite you to contact the manufacturer directly for additional support. Since they have additional resources at their disposal, they're much better equipped to aid in your request.
Reply · Report · Rick MStaff on Oct 3, 2016
· Add Answer · I Have This Question Too (0)

Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: AudioControl EQS (Gray)

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AudioControl EQS (Gray)

6 Channel Trunk Mount 13-Band Graphic Equalizer with 5-year warranty*!


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