4-acoustic Pro Audio SQ Series User manual

4-acoustic.com
SQ-Series Operation Manual REV01 1120
Pro Audio
Germany
4
acoustic
Operation Manual
SQ-1200 |SQ-1600 |SQ-2000|SQ-2400
SQ-1604 |SQ-2404 |SQ-3204

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SQ-Series Operation Manual REV01 1120
Table of Content
1.) Important Safety Instructions
1.1) Explanations Of Graphical Symbols........................................................................................ Page 4
1.2) Explanations Of Risk................................................................................................................. Page 5
1.3) Important Safety Instructions................................................................................................. Page 5
2.) Declarations
2.1) EC Declaration Of Conformity ................................................................................................. Page 6
2.2) FCC Compliance Notice ............................................................................................................ Page 6
2.3) WEEE Directive........................................................................................................................... Page 6
3.) Welcome
3.) Welcome....................................................................................................................................... Page 7
4.) Unpacking
4.1) Unpacking & Checking for Shipping Damage........................................................................ Page 8
5.) Installation
 5.1)InstallingYourAmplier .......................................................................................................... Page 8
6.) Dimensions
6.1) SQ-1200, SQ-1600, SQ-2000, SQ-2400 Dimensions ................................................................ Page 9
6.2) SQ-1604, SQ-2404, SQ-3204 Dimensions ................................................................................ Page 9
7.) Controls And Indicators
7.1) SQ Two Channel Front Panel ................................................................................................... Page 10
7.2) SQ Two Channel Back Panel .................................................................................................... Page 10
7.3) SQ Four Channel Front Panel .................................................................................................. Page 11
7.4) SQ Four Channel Back Panel ................................................................................................... Page 11
7.5) SQ Two Channel Switch Setting............................................................................................... Page 12
7.6) SQ Two Channel Switch Setting............................................................................................... Page 13
8.) Connecting
8.1) AC Mains Connection................................................................................................................ Page 14
8.2) Audio Input Connection ........................................................................................................... Page 15
8.3) Speaker Connection.................................................................................................................. Page 16
9.) System Setup
9.1) Typically Stereo System Setup ................................................................................................ Page 17
9.2) System Setup With 4-Wire Cable............................................................................................. Page 18
9.3) Subwoofer Setup In Bridge Mode ........................................................................................... Page 19
9.4) Four Channel Sound System.................................................................................................... Page 20
9.5) Two Channel Parallel Mode ..................................................................................................... Page 21
9.6) Stereo System Setup with Subwoofer and Mid/High Cabinets ........................................... Page 22
9.7) Stereo Subwoofer Setup With Build In Crossover ................................................................ Page 23
9.7) Setting System Gain Structure ................................................................................................ Page 24
9.8) Bridge Mode Function .............................................................................................................. Page 25
10.) Copyright
10.) Copyright .................................................................................................................... Page 25
11.) Technical Specication
 11.)TechnicalSpecicationSQ-1200,SQ-1600,SQ-2000,SQ-2400............................................. Page 26
 11.)TechnicalSpecicationSQ-1604,SQ-2404,SQ-3204 ............................................................. Page 27

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1.1) EXPLANATIONS OF GRAPHICAL SYMBOLS
The triangle with the lightning bolt is used to
alert the user to the risk of electric shock.
Symbol for earth/ground connection.
Symbol indicating that the equipment is for
indoor use only.
Symbol for conformity with Directive
2002/96/EC and Directive 2003/108/EC of the
European Parliament on waste electrical and
electronic equipment (WEEE).
The RoHS Symbol shows that this product is
RoHS compliant.
The CE-mark indicates the compliance with
the low voltage and electromagnetic compa-
tibility.
The triangle with the exclamation point is
used to alert the user to important operating
or maintenance instructions.
When the unit is installed in a cabinet or a
shelf, make sure that it has sucient space
on all sides to allow for proper ventilation.
(50 cm from the front and rear
Ventilation Openings)
To completely disconnect this apparatus from
the AC Mains, disconnect the power supply
cord plug from the AC receptacle.
To reduce the risk of Electric Shock, do not
attempt to open any parts of the unit. No
user serviceable parts inside. Refer servicing
to qualied service personal.
The Mains plug of the power supply cord
must remain readily accessible.
Do not expose this equipment to rain or
moisture, dripping or splashing liquids. Ob-
jects lled with liquids, such as vases, should
not be placed on this apparatus.
Connection to the Mains shall be done only
by an electrotechnical skilled person accor-
ding the national requirements of the coun-
tries where the unit is used.
WARNING
1.) Important Safety Instruction

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SQ-Series Operation Manual REV01 1120
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings.
Install in accordance with the manufacturer’s
instructions.
8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other
apparatus (including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polarized
or grounding-type plug. A polarized plug has two
blades with one wider than the other. A
grounding-type plug has two blades and a third
grounding prong. The wide blade or the third
prong is provided for your safety. If the provided
plug does not t into your outlet, consult an
electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched, particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.
11. Only use attachments/accessories specied
by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table
specied by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid
injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time.
14. Refer all servicing to qualied service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
15. Use the mains plug to disconnect the apparatus
from the mains.
16. WARNING: To reduce the risk of re or electric
shock, do not expose this apparatus to
rain or moisture.
17. Do not expose this equipment to dripping or
splashing and ensure that no objects lled with
liquids, such as vases, are placed on the equipment.
18. The mains plug of the power supply cord shall
remain readily operable.
19. Do not connect the unit’s output to any other
voltage source such as battery, mains source, or
power supply, regardless of whether the unit is
turned on or o.
20. Do not remove the top (or bottom) cover. Removal
of the cover will expose hazardous voltages. There
are no user serviceable parts inside and removal
may void the warranty.
21. An experienced user shall always supervise this
professional audio equipment, especially if
inexperienced adults or minors are using the
equipment.
22. The US National Dierences clause 16.3 requires
that network cables must be ame rated VW-1.
Before using the device, be sure to carefully read the safety instructions. Keep this document
with the device at all times.
!
CAUTION / VORSICHT
RISK OF ELECTRIC SHOCK!
DO NOT OPEN
STROMSCHLAG-GEFAHR
NICHT ÖFFNEN
CAUTION:
TO REDUCE THE RISK OF
ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
VORSICHT:
ÖFFNEN SIE NICHT DAS GEHÄUSE
STROMSCHLAGGEFAHR
REPARATUR NUR DURCH
FACHPERSONAL
1.3) IMPORTANT SAFETY INSTRUCTIONS
1.2) EXPLANATIONS OF RISK

Page 6 of 28 4-acoustic.com
NOTE: This equipment has been tested and found to
comply with the limits for a Class H digital device, pur-
suant to part 15 of the FCC Rules. These limits are desi-
gned to provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency ener-
gy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to
radio communications. However, there is no guarantee
that interference will not occur in a particular installati-
on. If this equipment does cause harmful interference to
radio or television reception, which can be determined by
turning the equipment o and on, the user is encouraged
to try to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
 dierentfromthattowhichthereceiveris
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
2.3) WEEE Directive
If the time arises to throw away your product, please
recycle all the components possible.
This symbol indicates that when the end-user
wishes to discard this product, it must be sent
to separate collection facilities for recovery
and recycling. By separating this product from
other household-type waste, the volume of
waste sent to incinerators or land-lls will be
reduced and natural resources will thus be
conserved.
The Waste Electrical and Electronic Equipment Directive
(WEEE Directive) aims to minimize the impact of electri-
cal and electronic goods on the environment. 4-Acoustic
comply with the Directive 2002/96/EC and 2003/108/EC
of the European Parliament on waste electrical nance
the cost of treatment and recovery of electronic equip-
ment (WEEE) in order to reduce the amount of WEEE that
is being disposed of in land-ll site. All of our products
are marked with the WEEE symbol; this indicates that
this product must NOT be disposed of with other waste.
Instead it is the user’s responsibility to dispose of their
waste electrical and electronic equipment by handing it
over to an approved reprocessor, or by returning it to
4-Acoustic for reprocessing. For more information about
where you can send your waste equipment for recycling,
please contact 4-Acoustic or one of your local distribu-
tors.
2.1) EC Declaration of Conformity
Manufacturer:
4-Acoustic Pro Audio Germany
INLINE Marketing GmbH
Bunsenstrasse 32
59227 Ahlen, Germany
We declare that under our sole responsibility the
the products:
AudioPowerAmplier
SQ-1200, SQ-1600, SQ-2000, SQ2400
SQ-1604, SQ-2404, SQ-3204
are in conformity with the provisions of the following EC
Directives, including all amendments, and with national
legislation implementing these directives:
• 2006/95/EC Low Voltage Directive
• 2004/108/EC Electromagnetic Compatibility Directive
• 2002/95/CE RoHs Directive
The following harmonized standards are applied:
EN 55103-1:2009 /A1:2012
EN 55014-1:2006 /A1:2009 /A2:2011
EN 55022:2010 /AC:2011
EN 61000-3-2:2006 /A1:2009 /A2: 2009
EN 61000-3-3:2013
EN 61000-3-11:2000
EN 61000-3-12:2011
EN 55103-2:2009 /IS:2012
EN 61000-4-2:2009
EN 61000-4-3:2006 /A1:2008 /IS1:2009 /A2:2010
EN 61000-4-4:2012
EN 61000-4-5:2006
EN 61000-4-6:2014
EN 61000-4-11:2004
EN 60065:2002 /A1:2006 /A11:2008 /A2:2010 /A12:2011
Ahlen, 01st November 2020
Detlef Risse
2.) Declarations
2.2) FCC Compliance Notice
This device complies with part 15 of the FCC rules. Ope-
ration is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
CAUTION: Changes or modications not expressly
approved by the party responsible for compliance could
void the user’s authority to operate the equipment.

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SQ-Series Operation Manual REV01 1120
Welcome at 4-Acoustic
ThankyouforselectingourSQ-Seriesamplierforyoursoundsystemdemand.
Wearecondentthatyouwillbesatisedwiththeprofessionalfeatures,excellentperfor-
manceandreliabledurabilityoeredbythisseries.
4-AcousticSQ-SeriesamplierscanbeusedinanunlimitedrangeofPAapplicationssuchas
touring, clubs, opera houses, theaters, churches, cinema, and theme parks.
Forsafeinstallationanduseofthisamplierpleasestudythisoperationmanualthoroughly
tobecomeacquaintedwiththebasiccongurationandcontroloptionsavailable.
ItprovidesabriefintroductiontothefeaturesandfunctionalityoftheSQ-Seriesamplier,
and it also contains the information required to safely install the product and place it in ser-
vice.
It is recommended that you also review all other product documentation to ensure familiari-
tywiththevariouscongurationandcontroloptions.
Thankyouagainforyourcondencein4-Acousticproducts.
3.) Welcome
Detlef Risse

Page 8 of 28 4-acoustic.com
First carefully inspect the shipping package before
opening it.
If you nd any damage notify the shipping company
immediately.
If there is no damage at the packing open it and imme-
diately inspect your new amplier.
Your 4-Acoustic amplier has been completely tested
and inspected before leaving the factory.
The box contains the following:
• SQ-Series amplier
• This operation manual
We recommend that you save all packing materials for
use if you ever need to transport the unit. Never ship
the unit without the factory carton and packing mate-
rials.
Disposal of the packing material. The transport and
protective packing have been selected from materials
which are environmentally friendly for disposal and
can normally be recycled. Rather than just throwing
these materials away, please ensure they are oered
for recycling.
4.1) Unpacking & Checking For
Shipping Damage
5.1) Installing Your Amplier
Before you begin, make sure your
amplierisdisconnectedfromthe
power source.
The common installation of the SQ-Amplier Series is in 19“
standard rack cabinets. In order to limit the risk of mechani-
cal damages, the ampliers must be xed to the rack using
both frontal and rear mounting brackets. (See Figure 5.1)
Note: Instead of connecting the amplier to the power grid
directly, plug the amplier’s mains connections to a power
distribution panel inside the rack cabinet.
Proper Cooling
When using an equipment rack, mount units directly
on top of each other. Close any open spaces in the
rack with blank panels. (Open spaces will reduce coo-
ling eciency.) DO NOT block front or rear air vents.
The rack should be a minimum of two inches (5.1 cm)
away from the amplier, and the back of the rack
should be a minimum of four inches (10.2 cm) from
the amplier back panel. Air ow is front to back as
illustrated in Figure 5.2.
CAUTION
4.) Unpacking 5.) Installation
Figure 5.1
Figure 5.2

Page 9 of 28
SQ-Series Operation Manual REV01 1120
6.1) SQ-1200, SQ-1600, SQ-2000, SQ2400 Dimensions
6.2) SQ-1604, SQ-2404, SQ-3204 Dimensions
6.) Dimensions
75,5
483
90
432
38,6038,60
39916,5
5
75,5
90
483
433
38,638,60
490
16,50
10
3204

Page 10 of 28 4-acoustic.com
L - AC Mains Powercord
Powercord with power supply plug
I - Speaker Output Section
Spkn and Binding Post connector per channel connect to
loudspeakers.
H - Cooling Fan Outlet
Outlet for cooling air ow. Do not block or cover this outlet
J - Switches
Switches for input mode and sensitivity setup.
K - Analog Input Section
Balanced Analog Inputs and Loop-Through Outputs for each
channel. A 3-pin female XLR connector for the signal input
and a 3-pin male XLR for the link throu output are provided
for each channel. The signal at the link outputs are paralle-
led with the input signal for feeding the input signal to other
ampliers.
7.) CONTROLS AND INDICATORS
7.1) SQ-1200, SQ-1600, SQ-2000, SQ2400 Front Panel
IL
J
K
H H
7.2) SQ-1200, SQ-1600, SQ-2000, SQ2400 Back Panel
A - Level and Signal Indicators
LEDs indicate signal presence and cliping:
Signal green = -20dB below rated output
Clip red = clipped signal detected at Input or Output
B - Protect Mode
Indicator Illuminates when the amplier output has stopped
operating.
C - Power CH A/B
Indicator Illuminates when power supply is activated for
channel 1/2.
G - Cooling Vent Grille
Provides cooling air ow ventilation from front to back. Do
not block or cover these vents.
E - Gain Control
Output level control for each channel.
F - Power Switch
Power LED´s Illuminate when the amplier is connected to
the mains power supply and switched on.
D - Bridge Mode CH A/B
Indicator (yellow) Illuminates when Bridge Mode is activated
for channel pair A/B.
G A
C,D
G F
B
A
B
E E
JM
M - Fuse
Resetable Fuse

Page 11 of 28
SQ-Series Operation Manual REV01 1120
7.3) SQ-1604, SQ-2404, SQ-3204 Front Panel
3204
K
J
H H
7.4) SQ-1604, SQ-2404, SQ-3204 Back Panel
7.) CONTROLS AND INDICATORS
G A
C,D
G F
A
BB
E E
E E
C,D
B
A - Level and Signal Indicators
LEDs indicate signal presence and cliping:
Signal green = -20dB below rated output
Clip red = clipped signal detected at Input or Output
B - Protect Mode
Indicator Illuminates when the amplier output has stopped
operating.
C - Power CH A/B and C/D
Indicator Illuminates when power supply is activated for
channel A/B and C/D.
G - Cooling Vent Grille
Provides cooling air ow ventilation from front to back. Do
not block or cover these vents.
E - Gain Control
Output level control for each channel.
F - Power Switch
Power LED´s Illuminate when the amplier is connected to
the mains power supply and switched on.
D - Bridge Mode CH A/B, C/D
Indicator (yellow) Illuminates when Bridge Mode is activated
for channel pair A/B or C/D.
IIL
M
L - AC Mains Powercord
Powercord with power supply plug.
I - Speaker Output Section
Spkn and Binding Post connector per channel connect to
loudspeakers.
H - Cooling Fan Outlet
Outlet for cooling air ow. Do not block or cover this outlet
J - Switches
Switches for mode and sensitivity setup.
K - Analog Input Section
Balanced Analog Inputs and Loop-Through Outputs for each
channel. A 3-pin female XLR connector for the signal input
and a 3-pin male XLR for the link throu output are provided
for each channel. The signal at the link outputs are paralle-
led with the input signal for feeding the input signal to other
ampliers.
M - Fuse
Resetable Fuse

Page 12 of 28 4-acoustic.com
7.5) SQ-1200, SQ-1600, SQ-2000, SQ2400 Switch Settings
Ground Lift: Select if the signal ground is connected to the amplifier.
Sensitivity: Select the input sensitivity.
Low Pass Filter: 100Hz 12dB/Oct if use Subwoofer without external crossover.
Input Mode: Select between Mono (Parallel), Stereo and Bridge Mode.
Clip Mode: Select if you connect 4Ωor 8Ω speaker to your amplifier.
The two channel models oer the following control options by setting up the control switches.
Clip Mode: To setup the internal clip limiter select the impedance of the speaker you are
 connectingtotheamplier.Select4Ohmor8Ohm.
GroundLift: Ifnessaryyoucandisconnectthesignalgroundfromtheamplier.Selectifthe 
ground of the signal will be connected or not.
Sensitivity Switches: Selectbetweenthreedierentinputsensitivitylevel.(0,775V/1,0V/1,5V)
The right setting and a correct system gain structure is very important to reach maximum
signal headroom, less noise and avoid clipping at any position of your sound structure.
Please refer to 9.7 Setting System Gain Structure.
Low Pass Filter: TousesubwooferwithoutaseperatecrossoverorDSPprocessoryourSQamplier
 hasabuildin100Hz/12dBlowpasslterasacrossoverforsubwoofer.
Select LPF if you want to use subwoofer without external crossover.
Input Mode: SelectbetweenStereo,Mono(Parallel)orBridgeMode.
If the switch is set to mono (parallel) mode the signal of the input socket CHA will be
internal linked to the Input signal for CHB.
In bridge mode channel A and B become to one bridge mode channel with much more
Power. Please refer to the details 9.8 Bridge Mode Function.
The lowest speaker impedance in bridge mode is 4 Ohm!
7.) CONTROLS AND INDICATORS
Figure 7.1

Page 13 of 28
SQ-Series Operation Manual REV01 1120
Sensitivity: Select the input sensitivity CH-AB and CH-CD.
Input Mode: Select between Mono (Parallel), Stereo and Bridge Mode.
7.6) SQ-1604, SQ-2404, SQ-3204 Switch Settings
The four channel models oer the following control options by setting up the control switches.
Sensitivity Switches: Selectbetweenthreedierentinputsensitivitylevel.(0,775V/1,0V/1,5V)
The right setting and a correct system gain structure is very important to reach maximum
signal headroom, less noise and avoid clipping at any position of your sound structure.
Please refer to 9.7 Setting System Gain Structure.
Input Mode: SelectbetweenStereo,Mono(Parallel)orBridgeMode.
If the switch is set to mono (parallel) mode the signal of the input socket CHA will be
internal linked to the Input signal for CHB. The signal of CHC will be linked to CHD.
In bridge mode CHA and CHB and (or) CHC and CHD become to one bridge mode channel
with much more Power. Please refer to the details 9.8 Bridge Mode Function.
The lowest speaker impedance of each output in bridge mode is 4 Ohm!
7.) CONTROLS AND INDICATORS
Figure 7.2

Page 14 of 28 4-acoustic.com
8.) CONNECTING
8.1) AC Mains Connection
This amplier comes with a mains power cord and plug used in your country. The AC mains voltage and current
must be sucient to deliver the power you need to drive this amplier. Ampliers don’t produce energy so all the
power the amplier need to provide to your speaker comes out of your mains connection.
Before connecting the powersupply check if the amplier is switched o. Connect the power cord with the
Mains supply before you switch on your amplier.
The ground connection of the supplied AC power cord connector is a required safety feature. Do not attempt to
disable this ground connection by using an adapter or other methods.
Please check the label on the back panel of your amplier about the correct power supply. Make sure that your
power source meets this requirement before you connect the mains supply. A wrong power supply could cause
damage of your amplier and connected equipment. If you are unsure please consult your electrician.
WARNING
Figure 8.1

Page 15 of 28
SQ-Series Operation Manual REV01 1120
8.) CONNECTING
8.2) Audio Input Connection
The cable quality has a major impact on the sound quality of your entire audio system. Take care to always use high quality
shielded wire cable for input wiring. The higher the density of the shield the better. Spiral wrapped shield should be not used.
- When using unbalanced lines keep the cables as short as possible and no longer than 3 meters.
- High-Level wiring such as loudspeaker wires or AC cords should not run together with audio signal cables. The chance of hum
and noise being induced in the signal cables gets higher as closer this two groups of cable are.
To prevent the risk of overdriving and damage transducers always turn o the entire sound system before start connecting or
change any connections.
Figure 8.2 shows connector pin assignments for balanced analog wiring
Figure 8.3 shows connector pin assignments for unbalanced analog wiring.
Figure 8.4 shows male and female XLR connector pin assignment.
Unbalanced Analog Input
Connector Wiring
2
1
3
2
1
3
PIN1=GND (Ground)
PIN2=SIG+(HOT)
PIN3=SIG-(Cold)
XLR Connector wiring
Figure 8.4
Figure 8.3
Pre-buildorprofessionallywiredbalancedcable(two-conductorplusshield)andconnectorsare
recommended.(Figure8.2)
Unbalancedline(Figure8.3)mayalsobeusedbutmayresultinnoiseoverlongcableruns.
Balanced Analog Input
Connector Wiring.
Figure 8.2

Page 16 of 28 4-acoustic.com
8.3) Speaker Connection
Recommended are professionally wired, high quality, heavy gauge speaker wire and connectors with two or four conductors.
Figure 8.5 shows the wiring with a 4-pole Spkn connector.
Figure 8.6 shows the connecting with banana plugs, spade lugs, or bare wire.
Select the appropriate size of wire based on the distance from amplier to speaker.
Distance Wire Size:
up to 10 Meter 1,5mm²
up to 30 Meter 2,5mm²
over 30 Meter 4,0mm²
CAUTION: Never use shielded cable for speaker wiring.
SHOCK HAZARD:
Whentheamplieristurnedonandpassingasignalpotentiallylethalvoltagesexistatthe
speaker output connectors. Use Class 2 output wiring.
WARNING
Figure 8.5
Figure 8.6
8.) CONNECTING

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SQ-Series Operation Manual REV01 1120
Channel A
Channel B
Audio Source
Channel A Channel B
Stereo Mode
Figure 9.1
9.1) Typically Stereo System Setup
Typical input and output wiring for stereo system setup. Maintain proper polarity (+/–) on output and input connectors. Use
Class 2 output wiring.
IMPORTANT: Turn o the amplier and unplug its power cord.
INPUTS: Connect analog input wiring for both channels.
OUTPUTS: Bindingpostsoutputsgure9.1
Connect Channel 1 loudspeaker’s positive (+) lead to Channel 1 positive
(red) terminal of amp; repeat for negative (–). Repeat Channel 2 wiring as for Channel 1.
 Spknoutputsgure9.2
To wire stereo speakers to the Spkn connectors plug the Channel 1 speaker into the Channel 1 Spkn
connector, and plug the Channel 2 speaker into the Channel 2 Spkn
SWITCHES: Select the input sensitivity accordingly your audio source or mixer.
Select the Input Mode to Stereo.
Channel A
Channel B
Audio Source
Stereo Mode
1+
1-
2-
2+
Channel BChannel A
1+
1-
2-
2+
2 Wire Cable
(1+/1-)
2 Wire Cable
(1+/1-)
Figure 9.2
9.) SYSTEM SETUP

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Channel A (Mid/High)
Channel B (Sub)
Audio Source
Stereo Mode
1+
1-
2-
2+
1+
1-
2-
2+
4 Wire Cable
CH B (SUB)
CH A (MID/HIGH)
2 Wire Cable
(1+/1-)
1+
1-
2-
2+
9.2) System Setup with 4 Wire Cable
Four wire system setups with subwoofer and Mid/High cabinet. Maintain proper polarity (+/–) on output and input connectors.
Use Class 2 output wiring.
IMPORTANT: Turn o the amplier and unplug its power cord.
INPUTS: Connect analog input wiring for both channels.
CHA Mid/High signal
CHB Sub signal
OUTPUTS: Spknoutputgure9.3
Plug the four-wire cable with Spkn plugs to the subwoofer input socket and to the CHA output
socket of the amplier.
The wiring is: Mid/High 1+/1-
Sub 2+/2-
The woofer must be connected 2+/2-. A link Spkn socket in the sub must link the 1+/1- signal
to the mid/high cabinet.
To connect the mid/high cabinet plug a two wire Spkn cable into the link socket of the subwoofer
and the cabinet you want to connect. To wiring must be 1+/1-.
SWITCHES: Select the input sensitivity accordingly your audio source or mixer.
Select the Input Mode to Stereo.
Figure 9.3
9.) SYSTEM SETUP

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SQ-Series Operation Manual REV01 1120
CHA (SUBWOOFER 1)
CHC (SUBWOOFER 2)
Audio Source
(DSM-428)
1+
1-
2-
2+
1+
1-
2-
2+
2 Wire Patch Cable
1+/2+ at the amplifier
1+/1- (or 2+/2-) at the subwoofer
2 Wire Patch Cable
1+/2+ at the amplifier
1+/1- (or 2+/2-) at the subwoofer
Bridge Mode
PARALLEL
9.3) Subwoofer Setup in Bridge Mode
Subwoofer setup in bridge mode. Maintain proper polarity (+/–) on output and input connectors. Use Class 2 output wiring.
IMPORTANT: Turn o the amplier and unplug its power cord.
The lowest speaker impedance of each output channel in bridge mode is 4 Ohm!
The wiring is 1+/2+ at the amplier and 1+/1- (or 2+/2-) at the subwoofer!
INPUTS: Connect analog input wiring for CHA and CHC
CHA Subwoofer 1 signal
CHB Subwoofer 2 signal
OUTPUTS: Spknoutputgure9.4
Plug the two wire patch cables with Spkn plugs to the subwoofer input socket and to the amplier
output sockets CHA and CHC.
The wiring is: Amplier socket 1+/2+
Subwoofer socket 1+/1- or 2+/2-
SWITCHES: Select the input sensitivity accordingly your audio source or mixer.
Select the Input Mode CHA-CHB to Bridge
Select the Input Mode CHC-CHD to Bridge
Figure 9.4
9.) SYSTEM SETUP

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Audio Source
(DSM-428)
Stero Mode
PARALLEL
STEREO
CHC right Mid/High signal
CHB right Sub signal
CHA left Mid/High signal
CHD left Sub signal
CH C / D
4 Wire Cable
1+/1- = CH C
2+/2- = CH D
CH A / B
4 Wire Cable
1+/1- = CH A
2+/2- = CH B
1+
1-
2-
2+
CH D (SUB)
CH C (MID/HIGH)
2 Wire Cable
1+/1- = CH C
1+
1-
2-
2+
2 Wire Cable
1+/1- = CH A
1+
1-
2-
2+
CH A (MID/HIGH)
CH B (SUB)
1+
1-
2-
2+
1+
1-
2-
2+
1+
1-
2-
2+
Typically, four channel sound setups for monitoring, multi room usage, or line array cluster. Maintain proper polarity (+/–) on
output and input connectors. Use Class 2 output wiring.
IMPORTANT: Turn o the amplier and unplug its power cord.
INPUTS: Connect analog input wiring for all channels.
OUTPUTS: Spknoutputsgure9.5
To wire the speakers connect two wire Spkn cables (1+/1-) from each speaker to the corresponding
output socket of the amplier.
SWITCHES: Select the input sensitivity accordingly your audio source or mixer.
Select the Input Mode to Stereo.
Figure 9.5
9.) SYSTEM SETUP
9.4) Four Channel Sound System (SQ-1604, SQ-2404, SQ-3204)