Audio Control EQS Manuel utilisateur

®making good stereo sound better®

22410 70th Avenue West  Mountlake Terrace, WA 98043  Phone 425-775-8461  Fax 425-778-3166

Owner’s Enjoyment Manual

Six Channel Pre-Amp Equalizer

EQS

Owner’s Enjoyment Manual

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EQS

Owner’s Enjoyment Manual 1

Table Of Contents

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features and Highlights. . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Quick Installation Information . . . . . . . . . . . . . . . . . . 4

A Guided Tour of the EQS . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Placement and Mounting . . . . . . . . . . . . . . . . . . . . 8

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Audio Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Level Matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Equalization Adjustment . . . . . . . . . . . . . . . . . . . . 12

PFM Subsonic Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Introduction

Congratulations on your purchase of the EQS, the

worlds first six channel pre-amp equalizer from AudioCon-

trol, the leading manufacturer of performance signal proces-

sors and analyzers. Whether this is your first product from

the rainforest dwellers of AudioControl or you are already a

firm believer, you will definitely enjoy how great the EQS

can make your performance autosound system sound.

Now before you start salivating too much just thinking

about the benefits of the EQS, take a few minutes to sit back,

have a latte’, decaffeinated if necessary, and

read through this manual. It contains lots of

useful facts and information - - and besides, we

spent a lot of time writing it!

Owner’s Enjoyment Manual

KEY FEATURES OF THE EQS FEATURES AND HIGHLIGHTS

Dual-bandwidth Equalization: Car interiors vary

widely in size and acoustic make-up. In addition doors, kick-

panels, and rear decks don’t make the best location for

speaker placement causing your high performance speaker

system to sound somewhat lackluster. The EQS offers

maximum equalization controls for each area of the audio

spectrum. One-third octave bass equalization combined

with one-half and full octave high frequency equalization

offers an ideal level of control.

13 Volt Pre-Amp Line Driver: The EQS offers a high

quality line driver that takes the low output voltage of a

source unit and increases it up to 18dB (13 volts peak). This

allows you to maximize the signal-to-noise of your system

and drive your amplifiers to their maximum output without

clipping. No hiss, clicks, or pops plus maximum sound

quality.

Auto Selecttm Inputs: Whether your source unit has

two, four, or six outputs, the EQS will automatically switch

the inputs to maximize your equalization controls.

Here are some of the cool features that are enclosed in

this magical box:

· Dual-bandwidth equalization

· 13 volt pre-amp line driver

· Auto Selecttm Inputs

· Voltage indicator LED’s

· Speaker level inputs

· PFM subsonic filter

· Balanced differential inputs

EQS

Owner’s Enjoyment Manual 3

Speaker Level Inputs: If you are like many people and

like the look and features of your factory installed source

unit but feel it’s lacking power and bass, we have good news.

The EQS has a unique high impedance speaker level input

that will interface with most factory installed source units

(even Bose) and let you add amplifiers and speakers to your

hearts content. However, unlike some of the cheesy speaker

level line output converters available, the EQS offers a very

high fidelity sound quality input.

PFM Subsonic Filter: This unique feature is legendary

with many AudioControl fanatics for it’s ability to fine-tune

the bass response of any system. Why waste power on nasty

subsonic information when your Programmable Frequency

Match (PFM) filter will help you clean things up.

Bulletproof Warranty: The most important feature

of all. Every AudioControl product is

selflessly designed and

manufactured by the

occupants of our

rainforest factory. We take every effort to ensure that you

will have many years of enjoyment out of your EQS. To

ensure the performance of your new toy, we highly recom-

mend that you allow your authorized AudioControl dealer

to perform the installation. Not only do they have all the

right knowledge and tools, but in the unlikely chance your

EQS should stop working, we will back it with a limited five

years parts and labor warranty. Should you choose to install

it yourself we will still give you one-year parts and labor

warranty. To activate your warranty, you need to FILL OUT

AND SEND IN YOUR WARRANTY CARD!

We also recommend that you save your invoice or sales

slip as proof of installation and ownership. Not only is it

necessary for warranty purposes, but should your EQS

”disappear” one day while your car is parked at your local

latte’ stand, you will find insurance companies very unfor-

giving without proof of purchase.

Owner’s Enjoyment Manual

QUICK INSTALLATION INFORMATION

For those of you short on time but high on ambition we

offer the following section to speed up your installation of

the EQS:

1. The EQS needs to be installed in the signal path between

your source unit and an external amplifier(s). If this is not

obvious to you, quickly pack up your EQS and run to your

nearest authorized AudioControl dealer to have them

perform the installation. You will thank us later.

2. Physically mount the EQS in a location that keeps it away

from soda spills, food crumbs, and curious fingers. How-

ever you will want to select a

location that allows you

access to the equalization

controls.

3. Hook up +12 volt power,

-12 volt ground, and remote

turn-on. If you need to know

more, then read on. Heck if

you don’t think you need to

know more, you should still read on, because you can

never know too much.

4. Level match the inputs of your EQS to your source and

then adjust the outputs to match with your amplifier

inputs.

Note: You will want to turn the gains on your amplifiers

DOWN to maximize your systems performance.

5. Now comes the fun apart. Set your equalization

controls to where your system sounds the most balanced yet

dynamic. More about this in the section titled “Adjusting

Your Equalizer”…and you thought you would not have to

read the rest on the manual. Hah!

Figure 1: Basic EQS System

EQS

Owner’s Enjoyment Manual

FACTORY SETTINGS

A GUIDED TOUR OF EQS

1. Inputs: The EQS has two types of inputs, PRE-AMP

and SPEAKER LEVEL. These inputs should get their signals

from the main source unit/head unit and should attach to

either RCA jacks or speaker leads that are coming out of your

source unit. If your source unit has a front, rear, and

subwoofer pre-amp outputs, connect them to identical

inputs on your EQS. If the source unit only has front and

rear inputs, don’t worry about losing your bass equalization,

the Auto Modetm circuitry in your EQS automatically routes

your subwoofer equalization controls to the rear channels.

2. Input Gain Controls: These knobs allow you to

increase or decrease the signal level from your source unit to

the EQS. Most aftermarket source units will require an

increase whereas radios installed by the automobile manufac-

turer will probably require you to decrease the signal level.

3. Equalization Controls: Each one of these nifty

knobs is essentially a “tone’ control dedicated to a specific

part of the audio spectrum. They can be adjusted to help

your speakers match with the “acoustical fingerprint” of

your cars interior. In addition you can tweak them to

coincide with your listening preference.

Shipped Options Page #

PFM Subsonic Filter 33Hz 15Hz-63Hz 7

Input Grounding Balanced Unbalanced 7

Ground Isolation Isolated 200ohm

or Ground 7

Choice of beverage Micro-brew Latté 19

Owner’s Enjoyment Manual

4. Output Level Controls: Although your EQS has

the ability to increase your signal voltage to 13 volts peak,

your amplifiers may not necessarily accept that much signal.

These controls allow you to regulate the proper amount of

pre-amp signal from the EQS to the amplifiers.

5. Output Voltage Indicators: These brightly

colored LED’s indicate the level of signal voltage that is

coming out of the various outputs of your EQS.

6. Outputs: These RCA connectors should be con-

nected to the next component after the EQS, such as a

crossover or amplifier. Do not connect any speakers directly

to your EQS or to any home appliances, like your toaster.

7. Power Connections: This nifty connector is a

godsend to anyone who has tried to wire up their gear with

their body crammed in the trunk. You can wire up the

power, ground, and remote turn-on from the convenience

and then casually plug it in the back of your EQS.

Figure 2: Top view of EQS

2 3 6

EQS

Owner’s Enjoyment Manual 7

UNDER THE COVERS

1. Input Grounding: For most systems you can leave

this jumper set in the BALANCED position. In some systems,

the source unit may look for a ground through the RCA

connection to the amplifier and create a ground loop, which

in turn can cause a whine (we are not talking about Merlot)

in your system. In that event, you should go ahead and

change the four jumpers to the UNBALANCED position.

2. Ground Isolation Selector: Occasionally alterna-

tor noise may appear in a system because the source unit and

amplifier are using different grounding schemes. To help in

this situation, we have provided alternative grounding

connections. Make sure your system is turned OFF before you

move these jumpers.

3. PFM Subsonic Filter: The EQS utilizes the world

famous AudioControl, PFM (Programmable Frequency

Match) filter to help with speaker control and amplifier

power management. To change the PFM frequency, it is as

simple as removing the cover and changing the module,

which you will want to do when the power is disconnected.

Your authorized AudioControl dealer carries an assortment

of these modules.

Figure 3: Cut away of inside of EQS

(not to scale)

Balanced

Unbalanced

Ground

Isolated

200W

Owner’s Enjoyment Manual

INSTALLING THE EQS

Up to this point everything you have read has served to

educate you on the operations of EQS. We are sure that you

are chomping at the bit to install EQS so we recommend you

read the following sections very carefully.

A. Placement & Mounting Of EQS

Placement: The EQS needs to be installed in the signal

path after your source unit but definitely before your

amplifiers and or any active crossovers. The chassis is usually

mounted in the rear of the vehicle close to the amplifiers as

possible.

Mounting: Once you have selected a permanent

mounting location, position the unit and mark the appropri-

ate mounting holes with a felt-tip pin or scratch awl. Before

doing anything else, make sure you are not about to drill a

hole in a gas tank or piercing any existing wiring. Nothing

ruins your day more than an expensive repair bill. Drill a few

small pilot holes and secure the chassis of the EQS with self-

tapping screws.

B. EQS Power Wiring

WARNING: Failure to disconnect the negative terminal of

your battery prior to the installation of you EQS can result in a

warm tingly feeling.

Remote Turn-On: Connect a 22 to 18 gauge wire from

the head-unit’s remote turn-on to the “Remote” connector

on the EQS .

Positive(+12V) Connection: Insert a 12-18 gauge

wire into the connector labeled “Power” on the nifty

connector of your EQS. Connect it to a good constant

source of 12 volts (we suggest the battery), fused at 2 amp.

Ground Connection: Use the same gauge wire as you

did for the positive connector and run it from the “Ground”

connector on the EQS to the negative terminal of the

battery, a ground bus, or a verified ground location. The

factory head unit ground is not a good ground!

When the electrical connections are complete, you may

reconnect the negative terminal to your battery.

Figure 4: Side view of EQS

Remote Power Ground

Power Connector

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