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- AUDIOL AB DQX-7200
DQX-7200
Digital amplier
USER MANUAL
P. 2
AUDIOLAB DQX-7200 -
DQX-7200
Digital amplier
DQX-72 00 is a digital power amplier with a maximum output power of 4 x 6500W @ 8-ohm / 4 x
1100W @ 4-ohm / 4 x 1800W @ 2-ohm and a maximum bridged output power of 3600W (RMS) @
4-ohm. The unit has a very ecient power/weight
relation and measures only 1 rack unit. The amplier comes with an advanced SMPS circuit and APFC
design to provide a variable power supply with extremely high eciency. DQX-7200 further provides
circuit protection for short-circuit, over-voltage or
under-voltage, temperature control, DC protection,
peak clipping, amplitude limiting and VHF protection, as well as an automatic temperature control
fan system. Very few ampliers on the market oer
that high power eciency with such low distortion
as the DQX-7200.
Specications
Output
• Rated output power (8-Ohm): 4 x 650W
• Rated output power (4-Ohm): 4 x 1100W
• Rated output power (2-Ohm): 4 x 1800W
• Rated output power (Bridge @ 16-Ohm):
1300W
• Rated output power (Bridge @ 8-Ohm): 2200W
• Rated output power (Bridge @ 4-Ohm): 3600W
Performance
• Input impedance: 20K ohm
• Input sensitivity: 1 Vrms
• Frequency Response: 20Hz~20KHz
• THD: <0.05%
• Crosstalk (at 1Khz): > 70 dB
• Signal to noise ratio: >105dB
• Damping factor: >200
• Slew rate: 50V/us
• CMR: 50 dB
• Protections: Over heat, Thermal, Long term
output power control, short-circuit, overload
& DC protection.
Connectors & backpanel controls
• 1 PowerCON
• 4 balanced female XLR-3
• 4 speakon speaker outputs
• Gain Switch: Gain switch selector with 1
Vrms, 32 & 26 dB.
• Mode selector: Mono, Stereo & Bridge
Physical
• Cooling: Two Front-to-back fans, temperature controlled speed.
• Net Weight: 9 kg. / 20 lbs.
• Dimensions: 483x364x44 mm. / 19x14.3x1.7 in.
1. OVERVIEW
English version
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- AUDIOL AB DQX-7200
English version
2. IMPORTANT SAFETY INSTRUCTIONS
• Only can plug the unit to the AC outlet which is
instructed in the user manual or the specications shown on the adapter. Otherwise it may
cause re or electric shock.
• Do not allow water to enter the unit or to
make it damp. Otherwise it may cause re or
electric shock.
• Do not place a container with liquid or small
metal objects on the unit. Otherwise, liquid or
small metal objects will fall inside de unit that
may cause re or electric shock.
• Do not place heavy objects (including this unit)
on the power cord, especially which is covered
by the carpet. Otherwise it may damage the
power cord, which will lead to a re or electric
shock.
• Avoid using the unit in the following places:
- Expose it under the splashing oil foam and
steam, such as near cooking stoves, humidiers and other places.
- At the unstable surface, such as the shaking
desktop or slope.
- Expose it under the hot environments, such
as the car with all the windows be cloased or
subject to direct sunlight.
- Expose it under the high humidity environments or the places with dust accumulation.
• Do not place the power cable near heaters.
Otherwise it may lead to melt, then causing a
re.
• Hold the insulation of the plug when unplug
the power cord from the AC outlet. Do not pull
the cable directly. Otherwise it may damage the cord, which leads to a re or electric
shock.
• Do not touch the power plug with wet hands.
Otherwise it may cause electric shock.
• This unit has a front and rear ventilation holes
to avoid aecting the inside device cooling, do
not block them. Otherwise it may cause a
re. Specially attention:
- Do not place the unit on its side or upside
down.
- Do not place the unit in poorly ventilated
places, such as a bookcase or closet.
- Do not use tablecloth to cover the unit, or
put it on the carpet and the bed.
• Leave enough space around the unit, in order to facilitate proper ventilation. The space
should be: At least 10cm for both sides,
at least 10cm for above. If it can not keep
enough air ow, the unit´s internal temperature will rise that may cause a re.
• To relocate the unit, please unplug the power
from the AC plug and unplug all connected
cables. Otherwise it may damage the cables
then lead to a re or electric shock.
• As the accessories of the unit (such as
machine feet, manual bag, desiccant, etc.),
please put it on the place which the children
can not catch easily.
• Do not scratch, bend, twist, stretch, or heat
the power cord. Otherwise it may damage
the power cord, and then will lead to a re or
electric shock.
• Do not open the unit´s casing. Otherwise
it may cause electric shock. If you think the
unit needs to be chacked, maintained or
repaired, please contact the dealer.
• Do not modify this unit. Otherwise it may
cause re o electric shock.
• If these is lightning, please turn o the unit
as soon as possible, and unplug the power
cable from the power outlet.
• When connect the speakers to the amplier´s output jacks, only can use dedicated
speaker cable. Using other cables may cuase
re.
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AUDIOLAB DQX-7200 -
English version
• When connect the unit, please turn o all the
musical instruments, audio equipments and
speakers. Please use the correct cable, and
connect it in accordance with regulations.
• Before turning on the power supplu of this
unit, please be sure to spin the volume control
to minimum. Otherwise, a sudden burst of
sound may damage your hearing.
• If you do not use the unit for a long period
of time, please unplug the plug from the AC
outlet. Otherwise it may cause re.
• If the power cord is damaged (such as cut or
bare wire), please ask for a replacement from
the dealer. Otherwise, continue to use this
unit that may cause re or electric shock.
• If this unit falls down from height or the cover
is damaged, please immediately turn o the
unit and unplug the plug from the AC outlet,
otherwise it may cause re or electric shock.
At the same time please contact the dealer.
• When nding any obnormality, such as
smoke, odor, noise or foreign matter and
other liquid enter into the unit, please immediately turn o the power switch and unplug
the power cord from the AC outlet. Otherwise, continue to use that may cause re or
electric shock. Please contact the dealer for
repair at the same time.
For your safety and the unit to work properly,
please strictly follow the manual´s instructions for installation and operation!
3. GENERAL DESCRIPTIONS
Basic functions descriptions
• Universal PFC (Power Factor Correction)
power supply, which can be used all over the
world.
• This product is impleenting a three-year warranty commitment to protect your investment
interests.
• The front panel has a large number of LEDs to
provide you accurate working status information of the product.
• Adopt the modular circuit design to facilitate
cooling and maintenance.
• Adopt the smart variable speed fan to force
the air cooling.
• Ecient circuit protections design can avoid
output short circuit, DC, load, over-temperature, over/under-voltage, high frequency
overload protections and so on.
How to use this manual
This manual provides you the information of the
safe and proper setting and operation for this
unit. But it does not cover the use instructions
of every occasion and all the situations that may
arise. For more information, please visit: audiolab.amproweb.com or contact our technical
support, system installer or dealer.
Symbol Description
The exclamarion mark within the triangle symbol is used to prompt the user
to pay attention to the important or
special instructions.
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- AUDIOL AB DQX-7200
English version
The lightning symbol within the triangle
symbol is used to prompt the user pay
attention to the risk of electric shock.
Service Information Card
Attach a "maintenance information card" at the
end of this manual, if the unit is fault and send
back to the dealer or service center for repair,
please ll out the form and deliver with the unit.
4. INSTALLATION
Warning: Before you beginning to install
the unit, please make sure to carefully
read and follow the "important safety
instructions" at the beginning of the manual.
Open the packaging and check whether the unit
is damage or not during the transportation. If the
unit is found damaged, please immediately notify
the transportation company. Only you have the
right to ask for the transport damage compensation. Pleae keep the box well as the damage evidence and provide it for the side delivery checking. Our company will provide you with necessary
assistance.
In aditio, we also recommend you saving all packaging materials for the need of the transportation.
Do not transport the unit without a package to
avoid damaging the unit. To make the unit work
normally, you also need to prepare the following
parts (our company does not provide):
1. Input wiring cable; Output wiring cable;
2. Ethernet cables (individual series need to use
the advanced features);
3. Network router (individual series need to
use advanced features);
4. Rack or unit mounting bracket (provide a
stable table for the unit stacked).
Warning: The third pin (grounding) of
the AC power cord connector which this
unit uses is the necessaty security components. Do not use adapters or other methods
to make the ground connection failure.
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AUDIOLAB DQX-7200 -
English version
Structure diagram
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- AUDIOL AB DQX-7200
English version
Cooling Description
This digital amplier series is designed according
to international 1 U size standards.
The cooling methods is: pumping the outside air
into inside the unit through the vents of the front
panel, and the bring out the heat through the
aluminium radiator in the unit and then out frim
the rear panel vents. The "smart" variable speed
DC fan is equipped in the unit, and then it can
adjust the wind speed through the temperature
detection and circuit detection for the heat sink
module. When the unit inside overheats, it will
adjust the fan speed to increase cooling eciency
immediately.
Connection mode illustration
Stereo mode connection illustration
If ant heat-sink overheats, the detection circuit
will reduce output power. If the amplier overheats, the temperature protection detection
circuit and its circuit will shut down and power
o until it cools to safe temperature.
After using this unit for a period of time (not
referring to the turn-on time), if it can not meet
the cooling eect after the fan running with high
speed for a long time, please turn o the machine and remove the mesh enclosure to clean
up the dust (only for the unit with the mesh
enclosure design).
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AUDIOLAB DQX-7200 -
Mono mode connection illustration
Bridge mode connection illustration
English version
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- AUDIOL AB DQX-7200
Interface Illustration
5. OPERATION
Warning: Before turning on the unit,
please make sure the unit is power o,
the power switch is in the "OFF/o" position, and all the volume knob has been set to the
lowest position.
Speaker protection
Clpping not only make thw sound worse, but also
will damage the high frequency drive unit. It is recommended you that don´t do the clipping to the
unit´s signal to protect the speaker. In addittion,
to avoid the speaker drive circuit burned which is
caused by the strong infrasound signal transmission of the unit, breathing or the high level which
is caused by the dropping of the microphone and
the low frequency signals. It should take one of
the followings ways:
1. Install the high-pass lter between the mixer
output and unit input.
2. Use the buil-in DSP to set the high-pass lter
(only for the unit with DSP).
3. Install a high-pass lter at the sides of the mix-
er. At the premise of without aecting the
use, set the lter frequency as high as possible. For example, for music is set to 35Hz, for
the microphone is set to 75Hz. I each mixer´s
input channel, set the frequency of the lter
with the relevant channel below the lowest
fundamental frequency.
Warning: Do not put the sensitive highgain devices (such as tape deck) above
or below the unit directly. This will form
a strong magnetic eld to cause a "buzzing"
sound near the unshielded device. If you use a
cabinet, we recommend you to place the sensitive devices at least 20cm to the units.
Start-up procedure
According to the users needs, please follow the
connection illustration section of the stereo,
bridge or mono mode of the manual to install,
if it is necessary to change the mode, please
disconnect the power supply.
English version
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AUDIOLAB DQX-7200 -
Precautions
Although the units is protected when happens the
internal and external fault, but you should take
the folloing measures to let the unit´s operation to
reach the optimum performance and the maximum safety:
1. Before using the unit, please congure the
unit rst to make it work normally. Include the
connections of the input wiring and output
wiring. The improper wiring connection will
cause the serious operational diculties. The
relevant conguration of the unit, please refer
to the "Installation" section of the manual.
2. Please be careful when connect, select the
signal source and control the output level. This
can save you a lot of troubles.
Warning: Do not connect the output end
to the power supply, the battery or the
primary power. This may cause electrical
shock. Note: There is a signal passing after turning
on the unit, the output interface may exist the
fatal voltage.
Operation Front Panel
3. Do not short connect the ground wire and
the input signal ground wire of the cable.
this will form a ground loop and couse the
oscillations.
4. Tampering of modifying the circuit without
authorization will be dangerous and will
make all services provided by agents lose
ecacy.
5. Do not use the unit when the yellow clip LED
is continued ashing.
6. Do not make the mixer overload, otherwise
it will send a clipping signal to the unit. The
unit will accurately reproduce such signals,
which may cause speaker damage.
7. Do not use the unit when the load impedance is lower than the nominal. Because of
the output protecton of the unit, this conguration will result to the premature cliping
and speaker damage.
Item Illustration Functions Description
1
Clip LED The LEd lights up orange when the output signal distortion on the
corresponding channel rises above 1%, which indicates that the "clipping" has occurred because the signal level is too high.
English version
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- AUDIOL AB DQX-7200
Operation Rear Panel
Signal LED
The corresponding LED will light up when the input signal exceeds
-32dB, -20 dB and 10dB. If the signal LED does not light up, please
check the gain setting, the input connections, the signal audio source
and whether the output line is short circuit. If the Signal 20dB or
-10dB Led illuminates with no signal input, there may be ystem
oscillations or some other malfunction. Disconnect the load and
fully reduce the gain. If the LED remains on, shows that the amplier
needs servicing.
2 Gain
Control
The maximum voltage gain of the amplier varies depending on the
model is shown of the designation. The gain controls are marked in
dB of attenuation. There are 21 detents for repeatable adjustments.
The upper 14 steps are about 1dB each, and settings should not be
used for normal program levels, as the input headroom could be
exceeded, but can be used for testing at reduced levels. At the minimum setting, the signal is completely cut o.
3
Power LED
Power on, LED will illuminate green. If no indication, please check
whether the AC power cord or AC outlet is unusual or not.
Thermal
LED
It will light up when the amplier overheats.
Bridge
Mono
Bridge mode, Mono mode.
Fault LED
It will light up red to indicate that protection is in eect. To provide
protection, the unit will not output any sound from the speakers
while this indicator is lit up. It will light up if the heat sink aberheats,
or if a DC voltage is detected at the amplier outputs. Also it will light
up for about a few seconds at time of power-on, as the amplier gets
ready to operate.
4 Power
switch
Switch on ad o the power supply. It will light up green when switch
on.
English version
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