2. Vehicles & accessories
  3. Motor vehicle electronics
  4. Car audio amplifiers
  5. SoundQubed
  6. AQ-20

SoundQubed AQ-20 Owner's manual

  • Hello! I am an AI chatbot trained to assist you with the SoundQubed AQ-20 Owner's manual. I’ve already reviewed the document and can help you find the information you need or explain it in simple terms. Just ask your questions, and providing more details will help me assist you more effectively!
Thank you for purchasing SoundQubed amplifiers for your car audio systems and competitions.
SoundQubed has introduced our SQ line of the products.
All SoundQubed amplifiers are designed with the sole purpose of being the best tool for the job.
SoundQubed amplifiers are designed for the highest possible efficiency and highest total output.
SoundQubed amplifiers make good amounts of power from stock electrical systems and are designed for the best sound quality reproduction.
The high efficiency comes from paying close attention to every stage through the amplifier's circuit.
High speed controller chipsets, efficient power devices, precise thermal management and engineering are the key to SoundQubed's design.
DESIGNF EATURES
High Power & Sound Quality Digital Monoblock amplifiers
Fully Working down to 4/2/1 ohm ( Linked down to 2ohm )
2 ~ 3 Ounce copper printed circuit board
High current mosfet switching devices
24dB/Oct precision crossover
Oversized O gauge power & Ground terminal
Heavy duty aluminum heatsink
Highest quality bolt fixing Rca jack
4 Ways of accurate protection circuits :
Speaker short
DC offset
Low & High Voltage protection
Thermal protection
The Highest possible efficiency and quality with hand-wound power supply transformers
SPECIF ICAT IONS
S P E C I F IC A T I ON S Q1 7 5 0 D Q1 1 2 0 0 D Q1 2 2 0 0 D Q1 3 5 0 0 D .1 A Q 2 0
Frequency Response 20Hz ~ 250Hz
Signal to Noise Ratio 100dB
Damping Factor 250 <
Input Sensitivity 5V ~ 0.15V
Low Pass Crossover 24dB / Oct
Low Pass Crossover Range 20Hz ~ 200Hz
Subsonic Crossover Range 10Hz ~ 50Hz @ 24dB/OCt
Bass Boost 0 ~ 6 dB narrowed bad 30~50Hz
Remote Controller Included
Output Master / Input Slave YES
Hand-wound Power Supply 1 pc 2 pcs 2 pcs 4 pcs 8 pcs
PCB Board 1 oz 1 oz 2 oz 3 oz 3 oz
Power Terminal Blocks 4 ga 4 ga 0 ga 0 ga x 2 0 ga x 3
Working Voltage 8.5V~16V 8.5V~16V 8.5V~16V 8.5V~18V 8.5V~15V
Fuse R ating for Single 30A x 3 40A x 3 200A 400A 900A
Fuse R ating for linked 180A 240A 400A 800A 1800A
OUTPUT POWER
OU T P U T P OW E R Q 1 7 5 0 Q1  1 2 0 0 Q1  2 2 0 0 Q1 3 5 0 0 D . 1 A Q2 0
Output Power @ 1ohm 300Wx1 510x1 770Wx1 1400Wx1 3000Wx1
Output Power @ 4ohm 750Wx1 1200Wx1 2200Wx1 4300Wx1 10200Wx1
Output Power @ 2ohm 1500Wx1 2400Wx1 4400Wx1 8600Wx1 20400Wx1
Output Power @ 2ohm Max 3000Wx1 4800Wx1 8800Wx1 17200Wx1 40800Wx1
GAIN
5Vto0.15V 10Hzto50Hz 0dB6bB 35Hz 250Hz
SUBSONIC BOOST LPF
BASS
SPEAKER
REMOTE
HeadUnit
RemoteControl
ToRcaJackinputofadditionalSoundQubedamplifiers
R L
L
L R
 ++
OUTPUT
MASTER
INPUT
SLAVE
INPUT
PRO
PWR
OUTPUT
IN OUT
RCAJACKINPUT
Connect preamp signal cables from the headunit to RCA
input of SoundQubed amplifiers
RCAJACKOUTPUT
Connection to RCA JACK input of additional
SoundQubed amplifier
POWER&PROTECTIONINDICATOR
Power LED, Green-lit shows correct operation Protect
LED, RED-lit shows general malfunction, faulty
connection or 4 ways protection
GAIN(5VTO0.15V)
Matching the output voltage of the headunit's RCA line-
outs to SoundQubed amplifier's input section.
SUBSONICCROSSOVERFREQUENCY(10TO
50HZ@24DB/OCT)
Control the high pass point for the speaker outputs to
eliminate extremely low frequencies.
BASSBOOST(0TO6BB@NARROWEDBAND30~50HZ)
It controls boost.
REMOTELEVELCONTROLPORT
This port is for connecting turn-down remote level control Remote level control
adjusts the level.
LPFCROSSOVERFREQUENCY(35TO250HZ@24DBOCT
)OUTPUTMASTER/INPUTSLAVE
OUTPUT MASTER / INPUT SLAVE connection makes 2pcs of SoundQubed
amplifiers as daisy chain connection to 2 ohm. Do not use output master / input
slave connections as 1 ohm.
SPEAKEROUTPUTS
it connects SoundQubed amplifiers to speakers. Minimum speaker cable is 12
gauge. 1ohm for Single unit & 2 ohm for Linked connection.
SQDIGITALAMPLIFIERS'POWER,GROUND,REMOT EENDPANEL
GND(GROUNDCONNECTION)
It is connected to the Negative or ground cables
of the Vehicle. Recommended cable is 0 gauge.
+12V(POWERCONNECTION)
This must be connected to the fuse positive
terminal ( +12V ) of the battery. Recommended
wire is 0 gauge.
REM(REMOTE)
It is connected to switched +12V with a Trigger cable coming from the head unit.
SPEAKEROUTPUTS
it connects SoundQubed amplifiers to speakers. Minimum speaker cable is 12 gauge. All
Single unit of SoundQubed digital amplifiers work to 1ohm. All linked SoundQubed digital
amplifiers work to 2ohm.
GND
POWER POWER POWER
REM GND GND+12V +12V+12V
HeadUnit
RemoteTurnon
+
12VBattery
+
12VBattery
+
12VBattery
AQ4SPECIF ICAT IONS
SPECIFICATIONS
Frequency Response 20Hz ~ 30KHz
Signal to Noise Ratio 105dB
Damping Factor 200 <
Input Sensitivity 9V ~ 0.2V
1.2 CH
Crossover Range 45 ( 450 ) Hz ~ 450 ( 4.5 ) Hz
Crossover Multiply x1, x10
Croosover selector CLONE 3.4CH / FULL / HPF
3.4 CH
Subsonic Crossover range 10Hz ~ 360Hz
Crossover range 45 ( 450 ) Hz ~ 450 ( 4.5 ) Hz
Crossover Multiply x1, x10
Crossover selector LP-BP / HPF-FULL
Bass Boost 0 ~ 12dB
OUTPUTPOWER AQ4
Power @ 4ohm 90W x 4
Power @ 20hm 125W x 4
Power @ 4ohm mono 250W x 4
AQ4INPUT&SPEAKEROUTPUT ENDPANEL
RCAJACKINPUT
Connect preamp signal cables from the headunit to RCA input of
SQ-4
GAIN(9VTO0.2V)
Matching the output voltage of the headunit's RCA line-outs to
SQ-4's input section.
XOVERFREQUENCY(45(450)HZ~4500(4.5K)HZ)@
12DB
Control X-over point for the speaker outputs
XOVERFREQUENCYMULTIPLY
It adjusts X-over frequency x1 and x10. In x1 position, its range is
45Hz ~ 450Hz. In x10 position, then adjust 450Hz ~ 4.5KHz
1/2CHXOVERSELECTOR
It has Clonse 3/4ch-FULL-HPF Clonse 3/4ch means same X-over
setting as 3/4CH
SUBSONICCROSSOVERFREQUENCY(10TO360HZ@
12DB/OCT)
Control the high pass point for the speaker outputs to eliminate extreme low
frequencies.
BASSBOOST(0TO12DB@NARROWEDBAND30~50HZ)
It controls boost
POWER&PROTECTIONINDICATOR
Power LED, Green-lit shows correct operation of SQ-4. Protect LED,
RED-lit shows general malfunction, faulty connection or thermal protection
3/4CHXOVERSELECTOR
It has LPF-BP/ HPF-FULL
LINEOUT
It has line outputs to another amplifier
SQ4POWER,GROUND,REMOT EENDPANEL
GND(GROUNDCONNECTION)
It is connected to the Negative or ground cables of the Vehicle.
Recommended cable is 4 gauge.
+12V(POWERCONNECTION)
This must be connected to the fuse positive terminal ( +12V ) of the
battery. Recommended wire is 4 gauge
REM(REMOTE)
It is connected to switched +12V with a Trigger cable coming from the
head unit
SPEAKEROUTPUTS
it connects SQ-4 to speakers. Minimum speaker cable is 12 gauge.
Minimum impedance is 2ohm stereo or 4ohm mono.
POWER,GROUND,REM OTECONNECT ION
+12V(POWERCONNECTION)
Before mounting AudioQ amplifiers, please disconnect the negative (-) wire from battery to protect any accidental damage to SoundQubed amplifiers
and car audio system. SQ-750, SQ-1200 & SQ-4 are designed to use 4 gauge power cable and ground connection and equipped with fuses. SQ-
2200, SQ-3500D.1 and SQ-20 are using 0 gauge power and 0 gauge power and ground connection and not equipped with fuses Connect the power
cables to power terminal labeled as +12V. You have to install the external fuses on the power cable for SQ-2200, SQ-3500D.1 and SQ-20 Connect
one end of fuse holders to the power cable and the other end of fuse holders to positive battery within 20 cm of the same cable. This fuse location will
protect the system and the vehicle against the possibility of a short circuit in the power cable. Be sure to use fuses and fuse holdera adequate for the
application
GND(GROUNDCONNECTION)
Locate a secure grounding connection as close to amplifier as possible. Make sure the location is clean and provides a direct electrical connection to
the frame of the vehicle. Connect one end of a short piece of the same size cable as the power cable to the grounding point. Run the one end of the
cable to the grounding point. Run the other end of the cable to the mounting location. Connect the ground cable to the screw terminal labeled as
GND.
REM(REMOTECONNECTION)
Run a remote turn on cable from the switched +12V source. You will be using to turn on the system components. This may be a toggle switch, a
relay, or your source unit's remote trigger cables, or power antenna trigger cable Connect the remote turn on cable to the power terminal labeled as
REM.
INSTALLATION
*.INTALLATION
In case, You install SoundQubed amplifiers by yourself, please read owner's manual and follow your installation steps very carefully. Before you start
your installation, Please take all steps into consideration. or you can have a SQ authorized distributor check the installation and set your car audio
systems.
*.MOUNTINGPREPARATION
Disconnect the negative (-) battery cable before mounting SoundQubed amplifiers or making any connections. Check the battery and alternator
ground (-) connections. Make sure they are properly connected and Free of corrosion Before selecting a mounting location for SoundQubed
amplifiers Please take some concerns into consideration with cooling efficiency and safety.
*.MOUNTINGLOCATION
SoundQubed amplifiers use heavy-duty and good heat radiation heatsink design for avoiding excessive heat from SoundQubed amplifier's circuitry.
But for better heat radiation performance, it is good to find the mounting location where you can install SoundQubed amplifiers vertically with the
heatsink fins and better air flow around SoundQubed amplifiers. For the safety, You have to find dry and well ventilated location and make sure any
cables and car equipment are not interfaced with mounting location. Be sure the mounting location and drilling of pilot cables for mounting wil not
present a hazard to any cables, control cables, fuel lines, fuel tanks, hydraulic lines or other vehile systems or components
SPEAKERCONNECT ION
SoundQubed amplifiers are recommended to use 12 gauge or thicker speaker connecting cables. Run 12 gauge speaker connecting cables from the
your speakers to SoundQubed amplifier's mounting location. Keep speaker cables away from power cables and SoundQubed amplifier's input cables.
Use grommets anywhere the cables have to pass through the holes in the metal frame or sheet metal. Connect the speakers according to the type of the
terminals on each speaker. Strip 3/8" of insulation form the end of each cable and twist the cables strands together tightly. Make sure there insulation
from the end of each cable and twist the cables together tightly. Make sure there are no stray strands that might touch other cables or terminals and
cause a short circuit. Crimp spade lugs over the cable ends or tin the ends with solder to provide a secure termination Connect the cable ends to
SoundQubed amplifiers as per speaker system diagram.
SQDIGITALAMPLIFIERS'SPEAKERCONNECTIONDIAGRAM
WARNING!!
SoundQubedamplifiersminimumimpedanceis1ohm
orLinkedminimumimpedanceis2ohm
GAIN
5Vto0.15V 10Hzto50Hz 0dB6bB 35Hz 250Hz
SUBSONIC BOOST LPF
BASS
SPEAKER
REMOTE  ++
OUTPUT
MASTER
INPUT
SLAVE
INPUT
PRO
PWR
OUTPUT
INL R RL OUT
4~1ohms
8~2ohms
8~2ohms
GAIN
5Vto0.15V 10Hzto50Hz 0dB6bB 35Hz 250Hz
SUBSONIC BOOST LPF
BASS
SPEAKER
REMOTE  ++
OUTPUT
MASTER
INPUT
SLAVE
INPUT
PRO
PWR
OUTPUT
INL R RL OUT
AQ4SPEAKERCONNECT IONDIAGRAM
WARNING!!
8~4ohms
AQ4minimumimpedanceis2ohmstereoor4ohmmono.
SOUNDQUBEDL INKABLECONNECT ION
SoundQubed linkable connection makes 2pcs of SoundQubed amplifiers to 2 ohm and double output power of single unit's 1ohm. Please study the
following connection diagram carefully to ensure the correct connections.
1. Connecting master amplifier to the headunit
2. Set master amplifier's output master and input slave siwtch to output master position
3. Connect the master and slave SoundQubed amplifiers's rca jack as per diagram
4. Set slave amplifier's output master and input slave switch to input slave position.
5. Connect speaker cable (+) on master amplifier to subwoofer (+)
6. Connect speaker cable (+) on slave smplifier to subwoofer (-)
7. Connect speaker cable (-) on master amplifier to speaker cable (-) on slave amplifier
GAIN
5Vto0.15V 10Hzto50Hz 0dB6bB 35Hz250Hz
SUBSONIC BOOST LPF
BASS
SPEAKER
REMOTE
HeadUnit RemoteControl
R L
LL R
 ++
OUTPUT
MASTER
INPUT
SLAVE
INPUT
PRO
PWR
OUTPUT
IN
GAIN
5Vto0.15V 10Hzto50Hz 0dB6bB 35Hz250Hz
SUBSONIC BOOST LPF
BASS
SPEAKER
REMOTE
LL RR
 ++
OUTPUT
MASTER
INPUT
SLAVE
INPUT
PRO
PWR
OUTPUT
TROUBL ESHOOT INGT IPS
NOSOUND(NOOUTPUT)
1. Pls check all connections, cables' routing short voltage at SoundQubed amplifiers and headunit.
2. Pls check fuses. If it is blown, pls replace with new one.
3. Pls check whether the speakers work well. you can test the speakers by connecting to another amplifier.
PROTECTION
SoundQubed amplifiers have the safest protection circuits. When the amplifier is shutdown, Protection LED ( RED light ) is turned on at endpanel.
SoundQubed amplifiers will be back on, when resetting headunit by turning off and on if there is no circuit fault.
1. Overload : make sure the recommended subwoofer speaker's minimum impedance and do not use lower than recommended ( minimum )
impedance. Single unit of SoundQubed amplifier recommended subwoofer speakers impedance is 1ohm. Linked SoundQubed amplifier's
recommended subwoofer speakers impedance is 2ohm. SQ-4 channel amplifier's minimum impedance is 2ohm stereo or 4ohm mono.
2. Overheat ( Thermal ) : SoundQubed amplifiers will be on some minutes later when they are shut down due to overheat. For better heat
dissapation, Pls make better airflow and no obstruction around SoundQubed amplifiers.
3. Speaker Short : Pls make sure the speaker wire connection and re-route speaker wires.
4. DC offset : When over 4V DC, SoundQubed amplifiers will be protected. Pls check whether SoundQubed amplifiers work after removing
FCA-input. If SoundQubed amplifiers work after removing RA-input, then pls measure DC by checking RCA-input L and R. Then DC is over
4V at input. Pls try by replacing headunit or source unit.
5. High & Low voltage protection : SoundQubed amplifiers have high and low voltage protection. SQ-750, SQ-1200 and SQ-2200 have voltage
protection range from 8.5 ~ 16 Volts. SQ-3500D.1 has 8.5 ~ 18 Volts. SQ-20 has 8.5V ~ 15 Volts. So make sure the battery voltage is within
recommended voltage ranges.
NOISEPROBLEMS
1. Readjust input level and check the speaker quality at another amplifier. Pls Replace poor quality seakers with good quality ones.
2. Pls check Ground contact between SoundQubed amplifiers and headunit.
3. Pls check Rca Jack and replace with new one or re-route Rca Jack cable.
4. Engine noise is caused by poor grounding of amplifiers, headunit, other components, battery or alternator, so pls check all grounding
connections.
POORBASSRESPONSE
1. Pls check speaker cables and reverse polarity of one channel
/