Audio Control EQL Concert Series Manuale utente

EQUALIZER/LEVEL MATCHER

22410 70th Ave. W., Mountlake Terrace, WA 98043

Phone 425-775-8461 • Fax 425-778-3166

www.audiocontrol.com

making good stereo sound better

OWNER’S MANUAL

Concert Series

Concert Series Owner’s Manual

Quick Installation Info

Refer to Figures 4, 5, and 6 (on pages 9, 10, and

11) when installing the EQL Equalizer.

The unit is shipped from our factory with

the Programmable Frequency Match filter

module set at 30 Hz (see page 18 to change

this).

For information on other system applica-

tions or related topics, please read further.

Table of Contents

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

Description ......................................4

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

Upgrading A Factory

(OEM) System ................................16

Making Your Own Programmable

Frequency Match Modules ............18

Troubleshooting ............................20

Warranty........................................22

Specifications ................................24

We design, test, and build each EQL Equal-

izer right here in the misty rain forests1of the

Pacific Northwest. When you look inside the

rugged two-piece steel chassis, you’ll find we

use only premium electronic parts and gold-

plated RCA jacks.

It all adds up to a product that will provide

you with many years of listening enjoyment

and will literally outlast your vehicle.

Congratulations!

You have purchased one of the most exciting

and innovative audio products available for

your car stereo system – the AudioControl

EQL Equalizer/Level Matcher.

The EQL can make any system sound better.

Even if you have followed the true path of

enlightenment and are having your new EQL

professionally installed, it doesn’t hurt to

read this manual. There’s nothing but reruns

on the tube anyway!

The EQL carries on a great tradition started

back in 1985, when we introduced the origi-

nal EQL. Since then, AudioControl has gone

on to win numerous awards and collect

many glowing reviews for its innovative

autosound products. We have learned a great

deal about cars, stereos, and acoustics over

the years. All of this has been poured into the

new EQL to give you the tools to make your

car stereo the envy of all your pals.

Introduction

1At last count, we see the sun only 129

days each year, so we use the abundant

indoor hours doing what we do best

– improving and inventing audio prod-

ucts – besides, it keeps us from going

insane.

Concert Series Owner’s Manual

ØDual Bandwidth Equalizer – 13 bands

The dual bandwidth design of the EQL

concentrates more control in the lower

bass frequencies where the interior of an

automobile causes problems. The higher

frequency controls are spaced on octave

centers to give you complete control

up to 16,000 Hz. No simple dash-mount

equalizer gives you this kind of flexibility.

ØLevel Matching

True standards in car stereo are hard to

find. Every manufacturer has a slightly

different interpretation of things. The in-

put and output level controls on the EQL

bring everything together. Now any head

unit can be connected to any amplifier

and the will system sound great.

ØBalanced Input

The EQL takes noise rejection a step fur-

ther than the average by incorporating

balanced differential input circuitry. By

looking at the output from your source

unit in a different way the EQL can reject

up to 60 dB of radiated noise.

ØProgrammable Frequency Match Filter

Our exclusive Programmable Frequency

Match (PFM) filter system brings out the

best in any system. A modular program-

mable low-cut frequency filter allows the

system installer to easily customize the

bass roll-off to match any speaker design.

Unruly subwoofer boxes can finally be

brought under control.

ØHigh Level Inputs

The EQL is so flexible that you don’t

even need to have pre-amp outputs on

your deck to enjoy the benefits of total

control. Speaker level signals can be run

directly into the EQL, equalized and level-

matched to use any aftermarket amplifier

or crossover with your system. There are

no limits.

IMPORTANT

For maximum product performance, noth-

ing is better than a professional system

installation. Your AudioControl dealer has

the training and tools to take care of the job

quickly and without the anxiety of drilling

holes in your car. If you are just a dyed-in-

the-wool do-it-yourselfer, then this manual

should provide all the info you need to suc-

cessfully make music with the EQL.

The Most Important

Instruction Of All

FILL OUT AND SEND IN THE WARRANTY

CARD! Also, save the invoice or sales slip as

proof of purchase. These actions will protect

your investment and allow us to better help

you with any service-related questions.

Introduction

Concert Series Owner’s Manual

Figure 1.Top panel

layout for EQL

Equalizer/Level Matcher.

Description

We’ve created the EQL Equalizer/Level

Matcher to make any system sound better.

This Performance Match™ Component2

features straightforward connections and

easy-to-adjust equalizer and level controls. To

learn more, read on.

Equalizer and Input/Output Level

Controls and Indicators

The top panel contains all equalizer controls,

input/output controls, and system indica-

tors. The equalizer controls are grouped by

channels in ascending frequencies from left

to right, as shown in Figure 1 on the previous

page.

Each equalizer control provides 12 dB of

boost or cut for each channel. The Input

Gain con- trols allow you to adjust the Left

or Right Input gain over a range of ± 18 dB.

Output attenuators provide up to 30 dB of

gain trim. The top panel

2Our line of Performance Match Components takes the guess-work

out of creating the best-sounding system by “matching” autosound

components to your vehicle. For more information, see page 21.

also includes several indicators to confirm

power and help set output levels.

ØHALF OCTAVE BASS EQUALIZER – six

half-octave bass equalizer controls for

each channel with frequency centers at

31.5, 45, 63, 90, 125, and 180 Hz.

ØOCTAVE EQUALIZER – seven full octave

equalizer controls with frequency centers

at 250 and 500 Hz; and 1, 2, 4, 8, and 16

kHz.

ØINPUT GAIN – variable gain controls to

adjust Left and Right Input levels.

ØOUTPUT LEVEL CONTROLS – output at-

tenuators for Left and Right Outputs.

ØINPUT MAXIMIZED – indicator for set-

ting the proper input gain. When this

light flickers you have juust the right

amount of input gain.

Ø2 VOLT OUTPUT – indicator for monitor-

ing output level to detect and set a 2 volt

level.

ØPOWER – indicator confirms power is

reaching the EQL.

Description

Concert Series Owner’s Manual

Connections and Equalizer Bypass

The front panel contains power and input/

output connections, as well as an equalizer

bypass button, as shown in Figure 2 (above.)

ØHIGH LEVEL INPUT – Our handy plug

for connection of speaker outputs from a

deck or factory stereo.

ØEQUALIZE IN/OUT – Press in to engage

the equalizer settings on your EQL.

Figure 2. Front panel layout for EQL

Equalizer/Level Matcher.

ØLINE LEVEL INPUT – RCA jacks for con-

nection of low-level stereo signals from a

head unit.

ØOUTPUT – RCA jacks for connection of

EQL outputs to the inputs of an amplifier.

ØREMOTE/+12/GROUND - Another handy

plug for power connections of your Re-

mote Turn-On lead, +12 Volts, and Power

Ground.

High Level

Input

L R

+ – – +

Equalize

Out

Line Level

Input

L R

Output

L R Remote Ground

+12

Programmable Frequency Match

Filter Module and Ground Isolation

Selector (Inside)

The Programmable Frequency Match fil-

ter module, as well as the Ground Isolation

Selector, are internal and can be accessed by

removing the four top screws and lifting the

top panel off the base, as shown in Figure 3

(also see Figure 8 on page 19). Be sure to turn

off the power before you open the EQL.

We ship each EQL with the Programmable

Frequency Match filter set at 33 Hz. Refer to

page 18 for information on how to create

your own custom PFM module.

Figure 3. Removing the four top screws and lifting

the top panel provides access to the Programmable

Frequency Match filter module .

Description

Concert Series Owner’s Manual

Installation

We strongly suggest you have the EQL profes-

sionally installed, but if you are doing it solo

this section lists the procedures you’ll need to

install the EQL in your vehicle. Before you be-

gin we suggest you read the next few sections

to plan the type of system you want.

System Applications

The EQL Equalizer/Level Matcher is quite

versatile. Use it to put together a simple

single-amplifier system, as shown in Figure 4

on page 9. Or better yet, add a couple of our

other fine components, and you are on your

way to building a great 2-way or 3-way sys-

tem, as shown in Figures 5 and 6 (on pages 10

and 11).

Installation Precautions

ØDo not mount the EQL Equalizer/Level

Matcher where it will be exposed to outside

elements or extreme temperatures. Avoid

areas that are subject to extreme road vibra-

tion or shock. The front bumper is definitely

out-of-bounds.

ØSelect an installation site that provides short

cable runs for minimum pick-up of engine

noise and RFI (radio frequency interference).

Keep RCA cables together, away from speaker

wires or power cables.

ØAt the proposed installation site, make sure

the holes you plan to drill will not hit the fuel

tank, fuel lines, brake lines (under chassis), or

go through any electrical wiring.

ØUse high-quality, fully-shielded RCA cables.

ØPlan on a single-point grounding scheme that

is common to grounded parts of the system.

Use no less than 16-gauge stranded copper

wire for the ground connection.

Indice

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