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EQL
Owner's Manual
28 pgs1.34 Mb0
PRODUCT SUMMARY JANUARY 2021
6 pgs3.66 Mb1

Audio Control EQL Owner's Manual

tm
Concert Series
EQUALIZER/LEVEL MATCHER
OWNER’S MANUAL
making good stereo sound better
®
22410 70th Ave. W., Mountlake Terrace, WA 98043
Phone 425-775-8461 • Fax 425-778-3166
www.audiocontrol.com
®
®
Concert Series Owner’s Manual
Quick Installation InfoQuick Installation Info
Quick Installation Info
Quick Installation InfoQuick Installation Info
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able of Contentsable of Contents
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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 applica­tions or related topics, please read further.
Introduction ....................................1
Description ......................................4
Installation ......................................8
Upgrading A Factory
(OEM) System ................................16
Making Your Own Programmable
F requency Match Modules ............18
T roubleshooting ............................20
Warranty .......................................22
Specifications ................................24
Congratulations!Congratulations!
Congratulations!
Congratulations!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.
Introduction
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We design, test, and build each EQL Equalizer right here in the misty rain forests1 of the Pacific Northwest. When you look inside the rugged two-piece steel chassis, you’ll find we use only premium electronic parts and gold­plated RCA jacks.
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 origi­nal 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.
It all adds up to a product that will provide you with many years of listening enjoyment and will literally outlast your vehicle.
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At 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 products – besides, it keeps us from going insane.
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Concert Series Owner’s Manual
ä Dual 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.
ä Level Matching
True standards in car stereo are hard to find. Every manufacturer has a slightly different interpretation of things. The input 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.
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ä Balanced Input
The EQL takes noise rejection a step further 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.
ä Programmable Frequency Match Filter
Our exclusive Programmable Frequency Match (PFM) filter system brings out the best in any system. A modular program­mable 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.
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äHigh 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 level­matched to use any aftermarket amplifier or crossover with your system. There are no limits.
Introduction
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IMPORTIMPORT
IMPORT
IMPORTIMPORT
For maximum product performance, noth­ing 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-in­the-wool do-it-yourselfer, then this manual should provide all the info you need to successfully make music with the EQL.
The Most ImportantThe Most Important
The Most Important
The Most ImportantThe Most Important Instruction Of AllInstruction Of All
Instruction Of All
Instruction Of AllInstruction 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.
ANTANT
ANT
ANTANT
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Concert Series Owner’s Manual
Figure 1.Top panel layout for EQL Equalizer/Level Matcher.
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DescriptionDescription
Description
DescriptionDescription
We’ve created the EQL Equalizer/Level Matcher to make any system sound better. This Performance Match™ Component
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features straightforward connections and easy-to-adjust equalizer and level controls. To
learn more, read on.
Equalizer and Input/Output LevelEqualizer and Input/Output Level
Equalizer and Input/Output Level
Equalizer and Input/Output LevelEqualizer and Input/Output Level Controls and IndicatorsControls and Indicators
Controls and Indicators
Controls and IndicatorsControls and Indicators
The top panel contains all equalizer controls, input/output controls, and system indicators. 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 con­trols 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
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Our line of Performance Match Components takes the guess­work out of creating the best-sounding system by “matching” autosound components to your vehicle. For more information, see page 21.
Description
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also includes several indicators to confirm power and help set output levels.
ä HALF 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.
ä OCTAVE EQUALIZER – seven full octave
equalizer controls with frequency centers at 250 and 500 Hz; and 1, 2, 4, 8, and 16 kHz.
ä INPUT GAIN – variable gain controls to
adjust Left and Right Input levels.
ä OUTPUT LEVEL CONTROLS – output
attenuators for Left and Right Outputs.
ä INPUT MAXIMIZED – indicator for set-
ting the proper input gain. When this light flickers you have juust the right amount of input gain.
ä 2 VOLT OUTPUT – indicator for monitor-
ing output level to detect and set a 2 volt level.
ä POWER – indicator confirms power is
reaching the EQL.
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Concert Series Owner’s Manual
Figure 2. Front panel layout for EQL Equalizer/Level Matcher.
High Level
Input
L R
+ – – +
Connections and Equalizer BypassConnections and Equalizer Bypass
Connections and Equalizer Bypass
Connections and Equalizer BypassConnections and Equalizer Bypass
Equalize
In Out
Line Level
Input
L R
Output
L R
The front panel contains power and input/ output connections, as well as an equalizer bypass button, as shown in Figure 2 (above.)
ä HIGH LEVEL INPUT – Our handy plug for
connection of speaker outputs from a deck or factory stereo.
ä EQUALIZE IN/OUT – Press in to engage
the equalizer settings on your EQL.
Remote Ground
+12
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ä LINE LEVEL INPUT – RCA jacks for con-
nection of low-level stereo signals from a head unit.
ä OUTPUT – RCA jacks for connection of
EQL outputs to the inputs of an amplifier.
ä REMOTE/+12/GROUND - Another handy
plug for power connections of your Remote Turn-On lead, +12 Volts, and Power Ground.
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Series II
Dual-Bandwidth Graphic Equalizer,
Programmable Frequency Match Filter,
Transformer Isolated DC/DC Power Supply
Left
6
0
+12-12
Right
-6
6
0
6
0
+12-12
-6
+12-12
-6
6
0
6
0
+12-12
-6 0
6
0
Octave Equalizer
-6
+12-12
-6
6
0
6
0
+12-12
-6
+12-12
-6
6
0
6
0
+12-12
-6 0
6
0
-6
+12-12
-6
6
0
+12-12
-6
250 Hz
2 KHz
+12-12
-6
6
1 KHz
+12-12
Half Octave Equalizer
0
500 Hz
-6
6
0
+12-12
-6 0
6
0
-6
+12-12
-6
6
0
+12-12
-6
31.5 Hz
16 KHz
+12-12
-6
6
8 KHz
+12-12
4 KHz
0
-6
6
+12-12 0
-6
6
+12-12
45 Hz
Left
6
0
+12-12
Right
-6
6
0
6
0
+12-12
-6
+12-12
-6
6
0
Input Gain
America
High Level
-6
6
+12-12
90 Hz
6
0
-6
-12
-18 +18
Input
L R
--
++
12
-6
+12-12
125 Hz
Output Level
Left
0
-12
-18 +18
Equalize
180 Hz
0
-
Right
6
12
Input
Line Level
L R
In
Out
6
+12-12 0
-6
6
+12-12
63 Hz
Made in
22410 70th Avenue West
Mountlake Terrace, WA 98043
206-775-8461
0
-
Output L R
Overload
Output Status
Serial Number
2 Volt Optimum
A
Performance Match
Component
PFM Module
Located Inside
Power
+12
Remote Ground
Figure 3. Removing the four top screws and lifting the top panel provides access to the Programmable Frequency Match filter module and Ground Isolation Selector.
Description
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Programmable FProgrammable F
Programmable F
Programmable FProgrammable F Filter Module and Ground IsolationFilter Module and Ground Isolation
Filter Module and Ground Isolation
Filter Module and Ground IsolationFilter Module and Ground Isolation Selector (Inside)Selector (Inside)
Selector (Inside)
Selector (Inside)Selector (Inside)
requency Matchrequency Match
requency Match
requency Matchrequency Match
The Programmable Frequency Match filter 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.
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