Owner’s manual
EQS746
7-BAND STEREO
EQUALIZER/CROSSOVER
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English
Thank you for purchasing this Clarion product.
• Please read this owner’s manual in its entirety before operating this equipment.
• After reading this manual, keep it handy, such as in your glove compartment.
• Save your sales receipt. The warranty at the end of this manual and your sales
receipt are essential for warranty service.
FCC Approval
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to consult the dealer or an experienced radio/TV technician for help.
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Contents
1. FEATURES ............................................................................................................. 4
2. PRECAUTIONS ...................................................................................................... 5
Installation ............................................................................................................... 5
3. CONTROLS ............................................................................................................ 6
4. OPERATIONS ......................................................................................................... 7
Setting system volume ............................................................................................ 7
Adjusting the controls ............................................................................................. 8
Setting the low-pass frequency ............................................................................... 8
Connecting an MP3 player or video unit ................................................................. 8
Care and maintenance ........................................................................................... 9
5. INSTALLATION AND WIRING................................................................................ 9
What is included in the box ..................................................................................... 9
Before starting ........................................................................................................ 9
Tools and additional components ......................................................................... 10
Mounting diagram ................................................................................................. 10
Wiring diagram ...................................................................................................... 11
6. TROUBLESHOOTING .......................................................................................... 12
The unit does not work; no lights .......................................................................... 12
Sound is distorted ................................................................................................. 12
No sound coming from the unit ............................................................................. 12
7. GLOSSARY .......................................................................................................... 13
8. SPECIFICATIONS ................................................................................................ 14
9. LIMITED WARRANTY INFORMATION ................................................................ 15
English
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1. FEATURES
The Clarion EQS746 is a 7-band stereo equalizer/crossover specifically created for the
mobile environment. The EQS746 provides powerful features in a compact size:
• Seven equalization bands (50Hz, 125Hz, 315Hz, 2.2KHz, 6kHz, and 16 kHz), each
frequency adjustable from -12 to +12dB (-15 to +15dB for subwoofer frequencies)
• Subwoofer output uses a built-in 18dB per octave electronic crossover fixed at 60Hz
or 90Hz.
• Three stereo RCA outputs to drive front, rear, and subwoofer audio amplifiers
• An auxiliary stereo RCA input for use with portable devices, such as an MP3 player
or DVD player
• Separate controls for master volume, subwoofer volume (sub level), front/rear fader,
and selection of main or auxiliary inputs
• Extended frequency response from 20 Hz to 30 kHz with exceptional 100 dB signalto-noise performance
• Gold-plated RCA connectors to ensure the best audio signal output
• ISO mounting holes and removable trim ring for custom installation
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2. PRECAUTIONS
• Do not operate this product in ways other than those described in this manual.
• Do not disassemble or modify this unit.
• Do not pour liquid or poke foreign objects into the unit. Water and humidity may
damage internal circuitry.
• If the unit becomes wet, turn off all power and ask your authorized Clarion dealer to
clean or service the unit.
Failure to observe these precautions may damage your car, the monitor, or the video
source, and may void the warranty.
Installation
Installation of mobile audio and video components requires experience with a variety of
mechanical and electrical procedures. Although this manual provides general installation and operation instructions, it does not show the exact installation methods for your
particular vehicle.
If you do not have the required knowledge and experience to successfully complete the
installation, consult an authorized Clarion dealer about professional installation options.
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3. CONTROLS
AUX (auxiliary) switch: Press to
select auxiliary or main inputs
Subwoofer volume
Master volume
Fader control: Use to balance sound
between front and rear speakers
Front out
L R
GND
REM
+12V
Rear panel connections
Low-pass frequency switch (60/90Hz)
Equalizer gain controls
To adjust gain, rotate control to desired setting
Front panel controls
Main in
L R
L R
Rear out
AUX gain control: Gain adjustment for left and right
auxiliary input
L R
Aux in
Sub out
L R
Top panel
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4. OPERATIONS
Setting system volume
1. Turn the master volume and subwoofer level controls to their minimum settings.
2. Turn the source unit on and increase the volume until you hear distortion.
3. Reduce the volume to just below the distortion point (approximately 80% of full
volume).
This is the maximum usable musical signal for the source unit. Turning the volume
beyond this point increases noise and distortion without increasing the musical
signal.
Note
Once you set the source unit volume, do not change it. Always use the
volume control on the EQS746 as the master (main) volume control. The
EQS746 has better electronics, a higher sound to noise ratio, and is more
linear than the volume settings on any source unit available.
Adjusting the controls
The EQS746 provides a graphic adjustment band for each of seven frequency ranges:
sub, low, mid, mid-high and high frequency. You can adjust the center of each frequency
band to fine tune the acoustical response to your vehicle’s interior.
1. Set all frequencies to the center position. The small dot on the control knob should
be set at 12 o’clock.
2. Play your favorite music track and adjust the individual controls to suit your taste.
Avoid extreme settings, which can distort musical peaks.
3. Increase or decrease the equalizer gain controls to suit your taste.
4. If your system includes a subwoofer, slowly increase the subwoofer level until you
hear a solid bass.
5. If your system includes rear speakers, adjust the fader control to add rear sound.
Set it so most of the music comes from the front and only fills the rear.
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Setting the low-pass frequency
Set the low pass frequency switch on the top of the EQS746 to either 60Hz or 90Hz
depending on the subwoofer and subwoofer amplifier requirements.
Connecting an MP3 player or video unit
1. Plug the MP3 player or video unit into the auxiliary RCA input on the back of the
EQS764 unit.
2. Make sure the auxiliary button on the front of the unit is out, ready to receive input
from the main RCA input (not the auxiliary RCA input).
3. Turn the EQS764 master volume to a normal listening level.
4. Press the play button on the auxiliary source.
5. Push in the AUX button to change to the auxiliary source.
6. Using a small flathead screwdriver, adjust the AUX gain controls located on the top
of the unit so that the volume of the auxiliary source matches the volume of the
main source.
Care and maintenance
Cleaning the cabinet
Use a soft, dry cloth to gently wipe dust and dirt from the unit.
Do not use benzene, thinner, car cleaner, or other cleaners. These substances may
damage the unit or cause the paint to peel.
Servicing the equalizer/crossover unit
In the event that trouble arises, never open the case or disassemble the unit. The
internal parts are not serviceable by the user. Opening any components will void the
warranty.
CAUTION!
Changes or modifications to this product that are not approved
by the manufacturer will void the warranty and will violate FCC
approval.
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5. INSTALLATION AND WIRING
Read these instructions and the following precautions carefully.
What is included in the box
In addition to this manual, the box contains:
• EQS746 7-band graphic equalizer
• 2 mounting brackets
• 8 Phillips-head screws
Before starting
Mounting precautions
The EQS746 can be mounted next to the source unit or under the dash using the
mounting brackets. The front panel controls should be easily accessible from the
driver’s seat. In addition:
• This unit requires additional mobile audio components for proper operation.
• Always use great care when attaching anything to a vehicle! Check clearances in
front of, behind, and on both sides of the planned installation before drilling any
holes or installing any screws.
Wiring precautions
Disconnect the ground (-) terminal on the vehicle’s battery.
English
WARNING!
To prevent short circuits during installation, always disconnect the vehicle’s negative (-) battery lead before making any
connections.
• This unit is exclusively for vehicles with a negative ground, 12V battery system.
• A good chassis ground connection is critical to minimize resistance and avoid noise
problems. Use the shortest wire possible and securely connect it to the car chassis
and the source unit ground.
• When routing RCA cables, keep the cables away from the power cables and output
speaker wires.
• If you are using a source unit without a remote turn-on lead, the EQS746 can be
turned on with a switched accessory lead. This accessory power source is located
in the factory harness at the back of the radio. This lead turns on and off with the
ignition key.
• Do not open the case. There are no user-serviceable parts inside. If you require
assistance, consult your Clarion dealer or an authorized Clarion service center.
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Tools and additional components
You will need:
• A Phillips-head screwdriver when mounting the unit in the vehicle
• A small flat-head screwdriver to adjust the AUX gain controls if you connect an MP3
player or video source
• High-quality RCA input and output cables
Extra cable can cause signal loss and act as an antenna for noise. Use only highquality RCA cables that are no longer than necessary to make a direct connection
with the source unit and amplifiers.
Mounting diagram
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Wiring diagram
Source unit
Auxiliary source
POWER
STOP
PLAY/PAUSE
SOURCE
NEXT
PREVIOUS
MENU
DISC AV1
VIDEO
CONTROLS
ENTER
Remote turn-on
Chassis ground
(bare metal)
Front out
L R
L R
Rear out
Main in
L R
Sub out
L R
L R
Aux in
Front amp/rear amp Sub amp
EJECT
AV2
AUDIO
L
R
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6. Troubleshooting
The unit does not work; no lights
The power wires may not be connected. Check the power and ground wiring, then
retest.
Sound is distorted
• The source unit volume may be set too high. Reduce the source unit volume.
• Equalizer gain controls are set too high. Turn the equalizer controls to the center
position and listen for distortion again. If the problem still occurs, see your authorized Clarion dealer.
• Speakers may be damaged. Consult your authorized Clarion dealer.
No sound coming from the unit
• The wrong input is selected. Press the AUX switch to turn the main inputs on.
• No remote-on. Using a voltmeter, check for +12V from the remote-on source.
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7. Glossary
Crossover
Equalization: the process of boosting or cutting sound signal frequencies to improve the
quality of the sound. The term comes from the filters used to add back high frequencies
at the receiving end of analog transmissions over wires.
Equalization band
dB: decibel, a measurement of the relative difference in power or intensity between two
acoustic signals
Gain control
signal expressed in dB
Graphic equalizer
adjust amplitude.
Hz
Octave
musical scale.
OEM
RCA input/output
refers to the type of connector, which was originally manufactured by Radio Corporation
of America.
Slope
the frequency drops off.
: A device that limits the range of frequencies sent to a speaker or amplifier.
: the frequency range impacted by a specific filter.
: gain is the amount of amplification (voltage, current or power) of an audio
: a multi-band variable equalizer that uses mechanical controls to
: Abbreviation for Hertz, a unit of frequency equal to one cycle per second.
: the musical principle of dividing sound frequencies into the eight notes of the
: Original Equipment Manufacturer
: port through which sound travels in and out of the system; “RCA”
: how fast the sound changes rated in dBs. The higher the dB number, the faster
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8. Specifications
Note
The technical data and the design of the equipment may change without
prior notice for the sake of technical improvements.
Graphic center frequencies: 50Hz, 125Hz, 315Hz, 750Hz, 2.2Hz, 6kHz, 16kHz
Boost/cut: 12dB
S/N ratio: 100dB
Frequency response: 10Hz-50kHz +/-1dB
Maximum output voltage: 7V
THD: 0.005%
Input sensitivity: 50mV - 3V
Head room: 20dB
Input impedance: 20kOhms
Output impedance: 2kOhms
Stereo separation: 82dB/1kHz
Operating voltage: 11V-15V negative ground
Size: 7” wide by 4 1/8” deep by 1” high
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9. LIMITED WARRANTY INFORMATION
For USA and Canada only
Except as noted, Clarion products purchased from an authorized Clarion dealer are warranted against all
defects in materials and workmanship for a period of one (1) year from date of original purchase.
The following Clarion products noted below ** are warranted against all defects in materials and workmanship
for a two (2) year period from the date of original purchase when purchased from AND installed by an
authorized Clarion dealer.
** DRZ9255 DXZ865MP DXZ765MP DXZ665MP DXZ465MP DFZ675MC DPX1150 DPX1800 DPX2250
All Clarion cables, wires and other accessories if purchased from an authorized Clarion dealer are warranted
against all defects in materials and workmanship for ninety (90) days from the date of original purchase.
ALL PURCHASES OF CLARION PRODUCTS FROM NON-AUTHORIZED CLARION DEALERS ARE
SUBJECT TO FURTHER WARRANTY RESTRICTIONS AS DESCRIBED BELOW.
The conditions of this Limited Warranty and the extent of responsibility of Clarion Corporation of America
(“Clarion”) under the Limited Warranty are as follows:
1. PROOF OF DATE OF PURCHASE FROM AN AUTHORIZED CLARION DEALER WILL BE REQUIRED
FOR WARRANTY SERVICE OF THIS PRODUCT. IN THE CASE OF THE TWO (2) YEAR LIMITED
WARRANTY FOR THE CLARION PRODUCTS NOTED ABOVE, PROOF OF DATE OF PURCHASE AND
PROOF OF INSTALLATION BY AN AUTHORIZED CLARION DEALER IS REQUIRED. INFORMATION
ABOUT CLARION AUTHORIZED WARRANTY SERVICE CENTERS MAY BE OBTAINED BY
CONTACTING CLARION AT THE ADDRESS LISTED BELOW.
2. This Limited Warranty will become void if service performed by anyone other than an approved Clarion
Warranty Service Center results in damage to the products.
3. This Limited Warranty does not apply to any product which has been subject to misuse, neglect or accident,
or which has had the serial number altered, defaced or removed, or which has been connected, installed,
adjusted or repaired, other than in accordance with the instructions furnished by Clarion.
4. This Limited Warranty does not cover car static or other electrical interferences, tape head or laser pick-up
cleaning or adjustments, or labor costs for the removal or reinstallation of the unit for repair.
5. The sole responsibility of Clarion under this Limited Warranty shall be limited to the repair of the product or
replacement of the product, at the sole discretion of Clarion.
6. Product must be shipped in its original carton or equivalent carton, fully insured, with shipping charges
prepaid. Clarion will not assume any responsibility for any loss or damage incurred in shipping.
7. CLARION PRODUCTS PURCHASED FROM A SOURCE OTHER THAN AN AUTHORIZED CLARION
DEALER, INCLUDING ANY AND ALL PURCHASES VIA THE INTERNET FROM A NON INTERNET
AUTHORIZED CLARION DEALER, SHALL NOT BE COVERED BY ANY CLARION LIMITED WARRANTY
TO THE EXTENT ALLOWED BY APPLICABLE LAW. IN THE EVENT AND TO THE EXTENT APPLICABLE
LAW PROHIBITS ELIMINATION OF WARRANTIES UNDER THESE CIRCUMSTANCES, THE
APPLICABLE LIMITED WARRANTY PERIOD SHALL BE DEEMED TO BE FIFTEEN (15) DAYS FROM
THE DATE OF ORIGINAL PURCHASE.
8. ALL IMPLIED WARRANTIES EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW SHALL
HAVE NO GREATER DURATION THAN THE WARRANTY PERIOD SET FORTH ABOVE. UNDER NO
CIRCUMSTANCES SHALL CLARION BE LIABLE FOR ANY LOSS OR DAMAGE, DIRECT OR
CONSEQUENTIAL, ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT. BECAUSE
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR
EXCLUSIONS OR LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, THE ABOVE
LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.
9. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE
OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
10. The laws of the state of California shall govern and control this Limited Warranty, its interpretation and
enforcement.
11. Should you have any difficulties with the performance of this product during the warranty period, please call
Clarion or visit our web site for a listing of Authorized Warranty Service Centers in your area. You may also
contact Clarion Customer Service at the address listed below for any service you may need with Clarion
products.
In USA
Clarion Corporation of America
Attn: Customer Service Manager
661 W. Redondo Beach Blvd.
Gardena, CA. 90247-4201
1-800-GO-CLARION (310)327-9100
www.clarion.com
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In Canada
Clarion Canada, Inc.
Warranty Service Center
2239 Winston Park Drive
Oakville, Ontario L6H 5R1
(905)829-4600
www.clarioncanada.com
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Clarion Corporation of America
All Rights Reserved. Copyright © 2006: Clarion Corp. of America
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Printed in China
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