Panasonic 4 Channel Power Amplifier Cy Pa4003u Operating Instructions

							4 Channel Power Amplifi er
Model:
 CY-PA4003U
2 Channel Power Amplifi er
Model:
 CY-PA2003U
Digital Mono Amplifi er
Model:
 CY-PAD1003U 
Operating Instructions
Manuel d’instructions
Manual de Instrucciones
  Please read these instructions (including “Limited Warranty” and “Customer Services Directory”) carefully before using 
this product and keep this manual for future reference.
  Prière de lire attentivement ces instructions (y compris la “Garantie limitée” et le “Répertoire des services à la clientèle”) 
avant d’utiliser ce produit et conserver ce mode d’emploi pour s’y référer ultérieurement.
  Lea con atención estas instrucciones antes de utilizar el producto y guarde este manual para poderlo consultar en el futuro.
(CY-PA4003U) 
						

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  Read the operating instructions for the unit and all other 
components of your car audio system carefully before 
using the system. They contain instructions about 
how to use the system in a safe and effective manner. 
Panasonic assumes no responsibility for any problems 
resulting from failure to observe the instructions given 
in this manual. 
  This manual uses pictographs to show you how to use 
the product safely and to alert you to potential dangers 
resulting from improper connections and operations. 
The meaning of the pictographs are explained below. 
It is important that you fully understand the meanings 
of the pictographs in order to use this manual and the 
system properly. Safety Information
This pictograph intends to alert you to 
the presence of important operating 
instructions. Failure to heed the 
instructions may result in severe injury 
or death.
This pictograph intends to alert you to 
the presence of important operating 
instructions. Failure to heed the 
instructions may result in injury or 
material damage.
Warning
Caution
Observe the following warnings when using the 
unit.  Use the proper power supply.  
 This 
product
 is designed for operation with a negative 
grounded 12 V DC battery system. Never operate this 
product with other battery system, especially a 24 V DC 
battery system. 
 
 Do not disassemble or modify the unit. 
  Do not disassemble, modify the unit or attempt to 
repair the product yourself. If the product needs to 
be repaired, consult your dealer or an authorised 
Panasonic Servicenter. 
 Do not use the unit when it is out of order. 
  If the unit is out of order (no power, no sound) or in an 
abnormal state (has foreign objects in it, is exposed to 
water, is smoking, or smells), turn it off immediately 
and consult your dealer.  
 Refer fuse replacement to qualifi ed service 
personnel. 
  When the fuse blows out, eliminate the cause and have 
it replaced with the fuse prescribed for this unit by a 
qualifi ed service engineer. Incorrect replacement of 
the fuse may lead to smoke, fi re, and damage to the 
product. 
 When replacing one fuse which has blown, replace 
other fuses at the same time.
  In some cases, fuses may deteriorate without failing. 
Using different substitutes or fuses with higher ratings, 
or connecting the unit directly without a fuse, could 
cause fi re or damage to the unit. If the replacement 
fuse fails, contact your nearest Panasonic Servicenter 
for service.
Warning
Observe the following warnings when installing.  Disconnect the lead from the negative () battery 
terminal before installation.  
  Wiring and installation with the negative () battery 
terminal connected may cause electrical shock and 
injury due to a short circuit. 
  Some cars equipped with the electrical safety 
system have specifi c procedures of battery terminal 
disconnection. 
  FAILURE TO FOLLOW THE PROCEDURE MAY 
LEAD TO THE UNINTENDED ACTIVATION OF THE 
ELECTRICAL SAFETY SYSTEM RESULTING IN 
DAMAGE TO THE VEHICLE AND PERSONAL INJURY 
OR DEATH. 
 Never use safety-related components for 
installation, grounding, and other such functions. 
  Do not use safety-related vehicle components (fuel 
tank, brake, suspension, steering wheel, pedals 
airbags, etc.) for wiring or fi xing the product or its 
accessories. 
 Check for piping, gasoline tank, electric wiring, and 
other items before installing the product. 
  If you need to open a hole in the vehicle chassis to 
attach or wire the product, fi rst check where the wire 
harness, gasoline tank, and electric wiring are located. 
Then open the hole from outside if possible. 
 After installation and wiring, you should check the 
normal operation of other electrical equipment.  
  The continuation of their using in abnormal conditions 
may cause fi re, electrical shock or a traffi c accident. 
 In the case of installation to an airbag-equipped 
car, confi rm warnings and cautions of the vehicle 
manufacturer before installation. 
 Make sure the leads do not interfere with driving or 
getting in and out of the vehicle. 
  Failure to heed this caution may result in an accident 
and/or injury. 
Warning
Observe the following cautions when using this 
unit.  Turn off the power supply before changing the 
switch setting. 
 Keep the sound volume at an appropriate level. 
  Keep the volume level low enough to be aware of road 
and traffi c conditions while driving. 
 This unit is designed for use exclusively in 
automobiles. 
 Do not operate the unit for a prolonged period with 
the engine turned off.   
  Operating the audio system for a long period of time 
with the engine turned off will drain the battery. 
 Do not expose the unit to direct sunlight or 
excessive heat. 
  Otherwise these will raise the interior temperature 
of the unit, and it may lead to smoke, fi re, or other 
damage to the unit. 
 Do not use the product where it will be exposed to 
water, moisture, or dust. 
  Exposure of the unit to water, moisture, or dust may 
lead to smoke, fi re, or other damage to the unit. Make 
especially sure that the unit does not get wet in car 
washes or on rainy days. 
 Stop to use the unit when the red indicator 
(PROTECT) lights up. 
  If the red indicator lights up, this unit will 
automatically shut down. Confi rm the speaker and 
other audio system’s wiring. 
 Do not touch the heat dissipation region of the 
amplifi er.
  If this unit is operated at a high output continuously, 
the upper side of the unit will get very hot. Do not 
touch it nor place anything on top of the unit. 
  Contact your local dealer for information about 
battery capacity. (If there is not enough battery 
capacity, increase the number of batteries.)
  Depending on the way you use this unit, (using at 
high volume for extended periods, increasing the 
number of amplifi ers etc. ) there may be insuffi cient 
battery capacity. There is a danger that the battery will 
run fl at, or other electronic parts may stop operating. 
  Do not knock anything against this unit when 
loading or unloading objects from the trunk. 
 Doing so will cause damage to this unit.
Caution
This unit cannot be used alone.
This unit is a power amplifi er for use with Panasonic 
car audio products and speakers.
For more details about safety information, refer to 
the operating instructions for the connected devices. Please follow the laws and regulations 
of your province or country for 
installation of the unit.For power connection, use the optional power cord 
specially designed for use with Panasonic car-audio/
AV system. 
Power cord kid (option): CA-PAC75 
						

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Safety Information 
(continued)
Observe the following cautions when installing.  Refer wiring and installation to qualifi ed service 
personnel. 
  Installation of this unit requires special skills and 
experience. For maximum safety, have it installed by 
your dealer. Panasonic is not liable for any problems 
resulting from your own installation of the unit. 
 Follow the instructions to install and wire the product.  
  Not following the instructions to properly install and 
wire the product could cause an accident or fi re. 
 Take care not to damage the leads.  
 Prevent them from getting caught in the vehicle 
chassis, screws, and moving parts such as seat rails. 
Do not scratch, pull, bend or twist the leads. Do not run 
them near heat sources or place heavy objects on them. 
If leads must be run over sharp metal edges, protect 
the leads by winding them with vinyl tape or similar 
protection. 
 Use the designated parts and tools for installation.  
  Use the supplied or designated parts and appropriate 
tools to install the product. The use of parts other than 
those supplied or designated may result in internal 
damage to the unit. Faulty installation may lead to an 
accident, a malfunction or fi re.  
 Do not install the product where it is exposed to 
strong vibrations or is unstable.   
  Avoid slanted or strongly curved surfaces for 
installation. If the installation is not stable, the unit may 
fall down while driving and this can lead to an accident 
or injury. 
 We strongly recommended you to wear gloves for 
installation work to protect yourself from injuries.  
  Failure to heed this caution may result in an accident 
and/or injury. 
 Be sure to grip both sides of this unit securely before 
attempting to move it. 
  Since this unit is quite heavy, the unit may fall down 
and this can lead to an accident or injury.
 Cover the unused terminals with insulating tape to 
prevent them from short circuiting. 
 When an extension lead is used, it should be as 
thick and short as possible; connect it fi rmly with 
insulating tape. 
  Wire breaks and short circuits can cause electrical 
shock or fi re.   
Caution
  Use the spacer included when installing the unit so 
that the fan and air hole on the base side of the unit 
are not covered. 
  If the fan and air hole on the base side of the unit are 
covered, the unit will become extremely hot and may 
fail.
Caution for mounting the unit: 
  Never mount the unit in any of the following locations 
to avoid damage due to overheating;
  • Near the heater port. 
  •  Places like the dashboard or rear deck, where it may 
be exposed to direct sunlight. 
  Do not mount the unit near the door, where it could be 
exposed to rain. 
  Keep a safe distance between the unit and other 
electronic equipment. 
  When a short circuit occurs, such as in the speaker 
output terminal, etc. the overload protection circuit will 
operate. This circuit protects the power amplifi er from 
further damage when a short circuit occurs. Operation 
will temporarily stop. In this case, check the cause of 
the short-circuit and if the problem is fi xed, normal 
operation will resume. 
  Since the power amplifi er has a very large output, the 
unit should be installed in the trunk of your car. 
  Do not install this unit under a carpet, otherwise the 
unit may fail because of immature heat dissipation.
  In case more than one power amplifi er is used, make 
sure to employ the power cord and the fuse having 
the current capacity larger than the total current 
corresponding to the maximum consumption powers 
of all the amplifi ers. Caution for the power cord (option):
  Follow an expert’s instruction for the use of the cord 
separately sold.
  For the power, make sure to use the battery lead (yellow) 
separately sold and specially designed for Panasonic 
car-audio/AV system, and to connect directly to the car 
battery. Use the cord having the fuse capacity larger 
than that of this unit. Connect the power cord and other 
cords corresponding to the power supply after all the 
connections to the speaker are completed.
  Keep the battery lead (yellow) away from the speaker 
cord.
  Make sure to use the ground lead (black) separately 
sold and specially designed for car audio system, and 
to connect it to the metal portion of the car chassis.
  Wire the battery lead (yellow), the ground lead (black), 
the speaker cords, and this unit with as much distance 
as possible from the antenna, the antenna cords and 
the car stereo (car radio).
  If the ground wire is common to both left/right and 
front/rear speaker wirings, this unit cannot be used. 
Always use the independent lead wire for the speakers 
to be used. In this case, redo the wiring.  
Caution for the speaker cord (option):
  The speaker cords and the power amplifi er unit should 
be kept away from the antenna and antenna extension 
cord. 
  Do not directly ground the speaker cords; do not share 
the negative leads of multiple speakers. 
  When using the RCA cords, keep away from the 
speaker cords. 
Caution for the speaker (option):
  Use speakers with a suitable maximum input. 
 In case of 4-channel/3-channel connection 
:
  Use speakers with the impedance of 28 .
 In case of 2-channel/stereo connection:
  Use speakers with the impedance of 48 . 
						

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CANADAWARRANTY SERVICEFOR PRODUCT OPERATION ASSISTANCE, please contact:  
Our Customer Care Centre: 
  Telephone #:  (905) 624-5505 
  1-800 #:   1-800-561-5505 
  Fax #:  (905) 238-2360
  Email link:   “Contact Us” on www.panasonic.ca 
FOR PRODUCT REPAIRS, please locate your nearest 
Authorized Servicentre at www.panasonic.ca: 
Link : “Servicentres™ locator” under “Customer support”  
Panasonic Factory Service: 
Vancouver 
Panasonic Canada Inc. 
12111 Riverside Way 
Richmond, BC V6W 1K8 
Tel: (604) 278-4211 
Fax: (604) 278-5627 
IF YOU SHIP THE PRODUCT TO A SERVICENTRE 
Carefully pack and send prepaid, adequately insured and 
preferably in the original carton. 
Include details of the defect claimed, and proof of date of 
original purchase.
Customer Services DirectoryU.S.A.Obtain Product Information and Operating Assistance; 
locate your nearest Dealer or Servicenter; purchase 
Parts and Accessories; or make Customer Service and 
Literature requests by visiting our Web Site at: 
http://www.panasonic.com/support
or, contact us via the web at: 
http://www.panasonic.com/contactinfo
You may also contact us directly at: 
1-800-211-PANA (7262), 
Monday-Friday 9 am-9 pm; 
Saturday-Sunday 10 am-7 pm, EST. 
Limited Warranty
ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING THE WARRANTY 
OF MERCHANTABILITY, ARE LIMITED TO THE PERIOD OF THE LIMITED 
WARRANTY. 
Some states do not allow the exclusion or limitation of incidental or 
consequential damages, or limitations on how long an implied warranty 
lasts, so the exclusions may not apply to you. 
This warranty gives you specifi c legal rights and you may also have 
other rights which vary from state to state. If a problem with this product 
develops during or after the warranty period, you may contact your dealer 
or Servicenter. If the problem is not handled to your satisfaction, then 
write to the warrantor’s Consumer Affairs Department at the addresses of 
the warrantor. 
PARTS AND SERVICE WHICH ARE NOT COVERED BY THIS LIMITED 
WARRANTY ARE YOUR RESPONSIBILITY. Customer’s Record 
Model 
No. 
Serial 
No. 
Dealer’s 
No. 
Code 
No. 
Dealer’s 
Address 
Date of 
PurchaseCANADAPanasonic Canada Inc. 
5770 Ambler Drive, Mississauga Ontario L4W 2T3 PANASONIC PRODUCT LIMITED WARRANTYPanasonic Canada Inc. warrants this product to be free from defects in 
materials and workmanship and agrees to remedy any such defect for a 
period as stated below from the date of original purchase.
CAR AUDIO PRODUCT – ONE (1) YEAR, PARTS AND LABOUR 
(The labour to install or remove the product is not warranted) 
LIMITATIONS AND EXCLUSIONS 
This warranty does not apply to products purchased outside Canada or to 
any product which has been improperly installed, subjected to usage for 
which the product was not designed, misused or abused, damaged during 
shipping, or which has been altered or repaired in any way that affects the 
reliability or detracts from the performance, nor does it cover any product 
which is used commercially. Dry cell batteries are also excluded from 
coverage under this warranty. 
This warranty is extended to the original end user purchaser only. A 
purchase receipt or other proof of the original purchase date is required 
before warranty service is performed. 
THIS EXPRESS, LIMITED WARRANTY IS IN LIEU OF ALL OTHER 
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
PURPOSE. 
IN NO EVENT WILL PANASONIC CANADA INC. BE LIABLE FOR ANY 
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES. 
In certain instances, some jurisdictions do not allow the exclusion or 
limitation of incidental or consequential damages, or the exclusion of 
implied warranties, so the above limitations and exclusions may not be 
applicable. 
 
U.S.A. PANASONIC CONSUMER ELECTRONICS COMPANY, 
DIVISION OF PANASONIC CORPORATION OF AMERICA 
One Panasonic Way, Secaucus, New Jersey 07094 
PANASONIC SALES COMPANY, 
DIVISION OF PANASONIC PUERTO RICO, INC. 
Ave. 65 de infanteria, Km. 9.5, San Gabriel Industrial Park 
Carolina, Puerto Rico 00985 PANASONIC AUTO PRODUCTS LIMITED WARRANTYLIMITED WARRANTY COVERAGE 
If your product does not work properly because of a defects in materials 
and workmanship.
Panasonic Consumer Electronics Company or Panasonic Sales Company 
(collectively referred to as “the warrantor”) will, for the length of the 
period indicated in the chart below, which starts with the date of original 
purchase (“warranty period”), at its option either (a) repair your product 
with new or refurbished parts, or (b) replace it with a new or refurbished 
product. The decision to repair or replace will be made by the warrantor. 
Categories Parts Labor
Audio Components (except items listed 
below) One (1) Year One (1) Year 
MXE Series Audio Components (except items 
listed below)Two (2) Years Two (2) Years 
Speakers One (1) Year Not Applicable 
Accessories (in exchange for defective items) Ninety (90) Days Not Applicable 
During the “Labor” warranty period, there will be no charge for labor. 
During the “Parts” warranty period, there will be no charge for parts. 
You must carry in or mail in your product during the warranty period. 
If non-rechargeable batteries are included, they are not warranted. This 
warranty only applies to products purchased and serviced in the United 
States or Puerto Rico. This warranty is extended only to the original 
purchaser of a new product which was not sold “as is”. A purchase receipt 
or other proof of the original purchase date is required for warranty 
service. 
CARRY-IN OR MAIL-IN SERVICE 
For Carry-In or Mail-In Service in the United States, call 1-800-211-PANA 
(7262) or visit 
Panasonic Web Site: http://www.panasonic.com
For assistance in Puerto Rico, call Panasonic Sales Company 
(787)-750-4300 or fax (787)-768-2910. 
LIMITED WARRANTY LIMITS AND EXCLUSIONS
This warranty ONLY COVERS failures due to defects in materials and 
workmanship, and DOES NOT COVER normal wear and tear or cosmetic 
damage. The warranty ALSO DOES NOT COVER damages which occurred 
during shipment, failures which are caused by products not supplied 
by the warrantor, failures which result from accident, misuse, abuse, 
neglect, mishandling, misapplication, alteration, faulty installation, set-up 
adjustment, maladjustment of consumer control, improper maintenance, 
improper antenna, inadequate signal reception or pickup, power line 
surge, improper voltage supply, lightning, modifi cation, commercial use 
(such as use in hotels, offi ces, restaurants, or other business uses) or 
rental use of the product, or service by anyone other than the technician 
form Factory Servicenter or other authorized service centers, or damage 
that is attributable to acts of God.
THERE ARE NO EXPRESS WARRANTIES EXCEPT AS LISTED UNDER 
“LIMITED WARRANTY COVERAGE”. THE WARRANTOR IS NOT LIABLE 
FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM 
THE USE OF THIS PRODUCT, OR ARISING OUT OF ANY BREACH OF 
THIS WARRANTY. (As examples, this excludes damages for lost time, 
cost of having someone remove or re-install an installed unit if applicable, 
travel to and from the sevicer, and loss of media, date or other memory 
contents. The items listed are not exclusive, but are for illustration only.)
For hearing or speech impaired TTY users, 
TTY: 1-877-833-8855 Accessory Purchases: Purchase Parts, Accessories and Instruction Books online 
for all Panasonic Products by visiting our Web Site at: 
http://www.pasc.panasonic.com
or, send your request by E-mail to: 
[email protected]
You may also contact us directly at: 
1-800-332-5368 (Phone) 1-800-237-9080 (Fax Only) 
(Monday-Friday 9 am to 8 pm, EST.) 
Panasonic Services Company 
20421 84th Avenue South, Kent, WA 98032 
(We accept Visa, MasterCard, Discover Card, American 
Express, and Personal Checks) 
For hearing or speech impaired TTY users, 
TTY: 1-886-605-1277Service in Puerto Rico Panasonic Puerto Rico, Inc. 
Panasonic Sales Company
Factory Servicenter: 
Ave. 65 de infantería, Km. 9.5, San Gabriel Industrial Park, 
Carolina, Puerto Rico 00985 
Phone (787) 750-4300, Fax (787) 768-2910Toronto
Panasonic Canada Inc. 
5770 Ambler Drive
Mississauga, ON L4W 2T3
Tel: (905) 624-8447 
Fax: (905) 238-2418  
						

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ContentsEnglish 2
Français 36
Español 70Safety Information .....................  2
Customer Services Directory .........  6
Limited Warranty ......................  7Before Reading These Instructions
 ...  8
Before Use ..............................  9
Features ................................ 10
Location of Controls .................. 12
Speaker System Setting 
  .................... 16
Speaker System Setting 
  .................... 19
Speaker System Setting 
  ................... 20
Note for Bridge Speaker Connection ....
21
Installation ............................. 22
Wiring .................................. 24
Wiring  ............... 26
RCA ......................................................... 26
SPEAKERS INPUT ................................... 27
Wiring  ............... 28
RCA ......................................................... 28
SPEAKERS INPUT ................................... 29
Wiring  ............. 30
RCA ......................................................... 30
SPEAKERS INPUT ................................... 31
Troubleshooting ....................... 32
Maintenance ........................... 34
Specifi cations ......................... 34
 Check the connections according to the manual of 
the device you have connected, and switch on the 
connected device’s power supply. 
 Adjust the GAIN to a satisfactory volume. (page 13, 14) 
 Refer to individual instruction and installation manuals 
for each device for detailed installation and wiring.Before Use Before Reading These Instructions
Differences among 3 Models This Operating instruction manual is for 3 models CY-PA4003U, CY-PA2003U and CY-PAD1003U. All illustrations 
throughout this manual represent model CY-PA4003U unless otherwise specifi ed. The following table describes the 
differences among 3 models. 
Models 
FeaturesCY-PA4003U CY-PA2003U CY-PAD1003U
Speaker connection 4/3/2-channel speaker 2/1-channel speaker 1-channel speaker
Maximum power output 250 W4 channel 600 W2 channel 1 100 W1 channel
Input channel  4-channel 2-channel 2-channel
4CH/2CH input selection Yes No No
HPF (High Pass Filter) Yes Yes No
Subsonic fi lter switch No No Yes
Fuse 35 A2 25 A3 25 A3
Speaker input connector 2 (1 for front speaker, 1 for 
rear speaker)1 (for left/right speaker) 1 (for left/right speaker)
Panasonic welcomes you to our constantly growing 
family of electronic products owners. We endeavor to give 
you the advantages of precise electronic and mechanical 
engineering, manufactured with carefully selected 
components, and assembled by people who are proud 
of the reputation their work has built for our company. 
We know this product will bring you many hours of 
enjoyments, and after you discover the quality, value and 
reliability we have built into it, you too will be proud to be 
a member of our family. 
CY-PA4003U 
4 Channel Power Amplifi er 
CY-PA2003U 
2 Channel Power Amplifi er 
CY-PAD1003U 
Digital Mono Amplifi er 
Accessories
Item Diagram Qty.
Operating Instructions 
(YEFM285830A) 1
Owners Information Card1
Installation Hardware (screws, cords, etc.) (page 22)Note: 
 The number in parenthesis underneath each accessory 
part name is the part number for maintenance and 
service. 
 Accessories and their parts numbers are subject to 
modifi cation without prior notice due to improvements.  
						

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FeaturesCY-PA4003U 250 W  4 channel maximum power output
Total 1 000 W maximum power output
An amplifi er connected to the 4-, 3- or 
2-channel speaker
2CH/4CH input selection:The 4-channel speaker output is available under the 
2-channel speaker input setting. Low-Pass Filter for subwoofer, High Pass 
Filter:Switchover of LPF/OFF/HPF is available.CY-PA2003U 600 W  2 channel maximum power output
Total 1 200 W maximum power output 
Low-Pass Filter for subwoofer, High Pass 
Filter:Switchover of LPF/OFF/HPF is available.CY-PAD1003U 1 100 W  1 channel maximum power output 
Low-Pass Filter for subwoofer:Switchover of LPF/OFF is available.
Head Unit 
(In-dash color LCD monitor/
DVD player): 
CQ-VD7003U, option
or
CQ-VD6503U, option 
Center speaker:  
EAB-CF2, option
4 Channel Power Amplifi er: 
CY-PA4003UDigital Mono Amplifi er (for 
subwoofer): 
CY-PAD1003U 
Subwoofer: CJ-SW3003U, option
5.1-channel Surround System (Combination with other Panasonic car audio products)You can enjoy a powerful 5.1-channel surround system by connecting Head Unit (CQ-VD7003U, CQ-VD6503U, option), 
4-channel amplifi er (CY-PA4003U) and monaural amplifi er for subwoofer (CY-PAD1003U). 
For more details, refer to the operating instructions for the connected devices. 

High Level Speaker Input connection:The high-quality playback sound is produced when 
connecting the unit to the speaker output lead of the Head 
Unit.
Use it when the Head Unit is not equipped with the 
terminal for the RCA output lead.Bass boost control system:The bass boost circuit is employed to play back the deep 
bass on the front and rear speakers.Crossover Frequency Control:The frequency band in the treble and the bass, which 
are played back on the front and rear speakers, can be 
adjusted. RCA output terminals: Equipped with RCA output for adding a power amplifi er. 
Front speakers: 
CJ-DA1733U, optionSurround Speakers: 
CJ-DA5723U, option  
						

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 High level speaker input terminal (SPEAKERS 
INPUT) 
  When connecting Head Unit without RCA output 
terminals.
 Power/protection indicator (PWR/PROTECT)
  Lights green: When the Head Unit power is on. 
 Lights red: 
  • When the speaker cords are short-circuited.
  •  When the speaker output line comes contact with the 
car grounding wire.
  •  When this unit fails and the speaker output generates 
a DC power source.
  •  When the amplifi er internally creates a high-pitched 
sound.
  •  When the connection of the Head Unit or this unit is 
not completed.Location of Controls       Caution Turn off the power supply before changing the 
switch setting.
 Stop to use the unit when the red indicator 
(PROTECT) lights up. 
  If the red indicator lights up, this unit will 
automatically shut down. Confi rm the speaker and 
other audio system’s wiring. 
 BASS BOOST control knob
  Turn this knob to boost the 45 Hz frequency sound. 
  It enhances the low-pitched sound.
  For some speakers, the sound may be distorted 
because of the excessive power input to them. In that 
case, turn down the bass level until the distortion 
stops.  
  Setting range: 0 dB to 15 dB 
 GAIN control knob
  In some instances, the acoustical output from each 
speaker may not be balanced properly depending upon 
the type of speakers or Head Unit being used. 
  Up:  Turn up the knob when the sound volume is not 
satisfactory even though the volume of the Head 
Unit is increased.
  Down:  Turn down the knob when the sound is 
distorted.
 Input select switch (LINE, SPEAKERS)
  LINE: When using RCA INPUT connectors. 
  SPEAKERS: When using SPEAKER INPUT connectors. 
 Channel A speaker output connector (SPEAKERS)
  Left Side () 
  Left Side () 
  Right Side () 
  Right Side () Fuses (FUSES) (35 A2)
 Upper cover
 Channel B speaker output connector (SPEAKERS) 
  Left Side () 
  Left Side () 
  Right Side () 
  Right Side ()
 Battery connector (12 V)
  To the car battery, continuous 12 V DC. 
 Amplifi er control connector (CONT)  
  To the head unit’s external amplifi er control power  
lead or to the car battery, continuous 12 V DC.
 Ground connector (GND) 
  To a clean, bare metallic part of the car chassis.   Crossover fi lter switch (LPF, OFF, HPF) 
  LPF (Low Pass Filter): LPF cuts off the treble, and 
outputs only a low-pitched sound for the subwoofer.
  OFF: All frequency bands are output without fi ltering. 
Select when a subwoofer is not connected.
  HPF (High Pass Filter): Sound is output from the 
speakers for a high-pitched sound and midrange 
sound after deleting the low-pitched sound.
 Crossover frequency control knob (FREQUENCY)  
  The frequency band of the treble and the bass played 
back on the front and rear speakers is adjusted.
  Setting range: 50 Hz to 250 Hz 
 Speaker output terminals (For CH A)  
  Equipped with RCA output for adding a power 
amplifi er. 
  It is not a Speaker input terminal. 
 Channel A input terminals (LEFT, RIGHT)  
 Channel B input terminals (LEFT, RIGHT)  
 Speaker channel select switch (4CH, 2CH) 
  4CH: When connecting Head Unit with 2 preout leads.
  2CH: When connecting Head Unit with 1 preout lead.The upper cover can be reinstalled along with the 
reinstallation of the main body of the unit, such that 
the cover is aligned with other devices for neat and 
better look.


  





For channel A (except )
For channel B (except )


 



How to dismount: 
Unscrew the terminal screw 
with Allen wrench .

Note: 
 Do not insert anything between the upper cover and 
this unit. Doing so will cause damage to this unit. 
						

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 High level speaker input terminal (SPEAKERS 
INPUT) 
  When connecting Head Unit without RCA output 
terminals.
 Speaker output terminals  
  Equipped with RCA output for adding a power 
amplifi er. 
  It is not a Speaker input terminal. 
 Speaker input terminals (LEFT, RIGHT)  
 Input select switch (LINE, SPEAKERS)
  LINE: When using RCA INPUT connectors. 
  SPEAKERS: When using SPEAKER INPUT connectors. Location of Controls 
(continued)
      Caution Turn off the power supply before changing the 
switch setting.
 Stop to use the unit when the red indicator 
(PROTECT) lights up. 
  If the red indicator lights up, this unit will 
automatically shut down. Confi rm the speaker and 
other audio system’s wiring. 
 Crossover frequency control knob (FREQUENCY)  
  The frequency band of the treble and the bass played 
back on the front and rear speakers is adjusted.
  Setting range: 50 Hz to 250 Hz 
 Power/protection indicator (PWR/PROTECT)
  Lights green: When the Head Unit power is on. 
 Lights red: 
  • When the speaker cords are short-circuited.
  •  When the speaker output line comes contact with the 
car grounding wire.
  •  When this unit fails and the speaker output generates 
a DC power source.
  •  When the amplifi er internally creates a high-pitched 
sound.
  •  When the connection of the Head Unit or this unit is 
not completed.
 Speaker output connector 
  
  Left Side () 
  Left Side () 
  Right Side () 
  Right Side ()
 Fuses (FUSES) (25 A3) 
 Upper cover Battery connector (12 V)
  To the car battery, continuous 12 V DC. 
 Amplifi er control connector (CONT)  
  To the head unit’s external amplifi er control power  
lead or to the car battery, continuous 12 V DC.
 Ground connector (GND) 
  To a clean, bare metallic part of the car chassis. 
  
  Subsonic fi lter switch (OFF, ON) 
  Switch ON to remove noise from subwoofer.   GAIN control knob
  In some instances, the acoustical output from each 
speaker may not be balanced properly depending upon 
the type of speakers or Head Unit being used. 
  Up:  Turn up the knob when the sound volume is not 
satisfactory even though the volume of the Head 
Unit is increased.
  Down:  Turn down the knob when the sound is 
distorted.
 BASS BOOST control knob
  Turn this knob to boost the 45 Hz frequency sound. 
  It enhances the low-pitched sound.
  For some speakers, the sound may be distorted 
because of the excessive power input to them. In that 
case, turn down the bass level until the distortion 
stops.  
  Setting range: 0 dB to 15 dB 
 Crossover fi lter switch (LPF, OFF, HPF) 
  LPF (Low Pass Filter): LPF cuts off the treble, and 
outputs only a low-pitched sound for the subwoofer.
  OFF: All frequency bands are output without fi ltering. 
Select when a subwoofer is not connected. 
 
  HPF (High Pass Filter): Sound is output from the 
speakers for a high-pitched sound and midrange 
sound after deleting the low-pitched sound.
 


The upper cover can be reinstalled along with the 
reinstallation of the main body of the unit, such that 
the cover is aligned with other devices for neat and 
better look.How to dismount: 
Unscrew the terminal screw 
with Allen wrench .
 



 
 


 
 
  
  SP () 
  SP () 
  SP () 
  SP ()
Note: 
 Do not insert anything between the upper cover and 
this unit. Doing so will cause damage to this unit. 
						

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Speaker System Setting 
4CH Input4-channel Speaker System3-channel Speaker System
2-channel Speaker System (Monaural)
INPUT CH A
RCA cord (option)
(from Head Unit output terminal)
INPUT CH B
Speaker output CH A
Speaker output CH BLeft  
(min. 2 )
INPUT CH A
INPUT CH B
RCA cord (option)
(from Head Unit output terminal)
Speaker output CH A
Speaker output CH BSubwoofer 
(Bridge connection) 
(Monaural)
RCA cord (option)
(from Head Unit output terminal)
Speaker output CH A
LeftRight 
(min. 4 )INPUT CH A INPUT CH B
Subwoofer 
(Bridge connection) 
(Monaural)LeftRight 
(min. 4 )
Speaker output CH BSubwoofer 
(Bridge connection) 
(Monaural)
LeftRight (min. 4 )
RCA cord (option)
(from Head Unit output terminal)
Speaker output CH A 
(Outputs left channel audio.) Input the front left channel 
(white)/rear left channel 
(white).  Input the front right channel (red)/rear right 
channel (red).  
(Bridge connection) Left 
(min. 4 )
Speaker output CH B
(Outputs right channel audio.)(Bridge connection) 
Right 
(min. 4 )
2-channel Speaker System (Stereo)
Switch to 4CH. 
Switch to 4CH. Switch to 4CH. 
Switch to 4CH.  Right 
(min. 2 )
Left  (min. 2 )Right  (min. 2 )
Left  
(min. 2 )Right 
(min. 2 )
Note: 
 When the Head Unit is connected to the RCA cord, note 
that the RCA white and red leads differ in color from the 
unit terminals.
 Connect both front left/rear left and front right/rear 
right inputs. Using a single input connection halves the 
output. Special Application
Example: Connecting left channel audio output to 
CH A and right channel audio output to CH B. 
						

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Speaker System Setting 
 (continued)
2CH Input4-channel Speaker System2-channel Speaker SystemInput the left channel (white). 
RCA cord (option)
(from Head Unit output terminal)Input the right channel (red). 
Speaker output CH A
Speaker output CH BInput the left channel (white).  Input the right channel (red). 
Not used. 
Speaker output CH A
Left (min. 4 )
Speaker output CH B
(Bridge connection) Note: 
 The fader control is ineffective.
 The speaker outputs A and B are at the same 
level.
 The 3-channel speaker output is not allowed 
with the 2-channel input connection. 
 When the Head Unit is connected to the RCA 
cord, note that the RCA white and red leads 
differ in color from the unit terminals.
(Bridge connection) 
Right (min. 4 )Note: 
 This is not a monaural output.
 The 3-channel speaker output is not allowed 
with the 2-channel input connection.  
 When the Head Unit is connected to the RCA 
cord, note that the RCA white and red leads 
differ in color from the unit terminals.Switch to 2CH. 
Switch to 2CH.  Left  
(min. 2 )Right 
(min. 2 )
Left (min. 2 )
Right (min. 2 )
Speaker System Setting 1-channel Speaker System (Monaural)2-channel Speaker System (Stereo)
Subwoofer 
(Bridge connection) 
(Monaural)   INPUT
RCA cord (option)
(from Head Unit output terminal)
Speaker output 
Left  
(min. 2 )Right 
(min. 2 )
INPUT
RCA cord (option)
(from Head Unit output terminal)
Speaker output 
LeftRight 
(min. 4 )
Not used. Special Application
Example: If the Head Unit only has a single pre-out, 
connect it to this unit for 4-channel audio output. 
RCA cord (option)
(from Head Unit output terminal)
Special Application
Example: If the Head Unit only has a single pre-out, 
connect it to this unit for 2-channel audio output.