KRX PORTABLE SYSTEMS Ver. 1.3
KRX202, KRX402, KRX802
USER GUIDE
English
KRX202
KRX402
KRX802
KRX PORTABLE SYSTEMS Ver. 1.3
TABLE of CoNTENTS
SYMBoLS ................................................................................ 3
1. INTRoDUCTIoN ..................................................................... 4
2. KEY fEATURES ...................................................................... 4
3. APPLICATIoNS ....................................................................... 4
4. SAfETY INfoRMATIoN ............................................................ 5
5. UNPACKING ......................................................................... 7
6. PRoDUCT PHYSICAL ovERvIEw ................................................ 8
6.1 KR X 202 ........................................................................................... 8
6.2 KRX402 ........................................................................................... 9
6.3 KRX802 ..........................................................................................10
7. wIRING ............................................................................... 11
8. SYSTEM SETUP .................................................................... 12
9. AMPLIfIER ........................................................................... 15
9.1 AC PowER ....................................................................................... 15
9.2 voLTAGE REQUIREMENT ...................................................................... 15
9.3 CURRENT REQUIREMENT ..................................................................... 15
9.4 PRoTECTIoN CIRCUITRY ...................................................................... 16
9.5 SUBwoofER REAR PANEL ................................................................... 17
9.6 RS485 NETwoRK .............................................................................. 19
10. ToUCH SCREEN fUNCTIoNS ................................................. 20
11. SERvICE ........................................................................... 23
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KRX PORTABLE SYSTEMS Ver. 1.3
SYMBoLS
K-array declares that this device is in compliance with applicable CE
standards and regulations. Before putting the device into operation, please
observe the respective country-specific regulations!
Waste Electrical and Electronic Equipment (WEEE)
Please dispose of this product at the end of its operational lifetime by bringing
it to your local collection point or recycling center for such equipment.
This symbol alerts the user to the presence of recommendations about the
product’s use and maintenance.
Warning: DANGEROUS VOLTAGE.
Terminals marked with this symbol carry a risk of electric shock, therefore
external wiring connected to these terminals requires installation by a
qualified professional or the use of ready-made leads or cords.
This symbol alerts the user to the presence of recommendations about
product’s use and maintenance.
This device complies with the Restriction of Hazardous Substances Directive.
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KRX PORTABLE SYSTEMS Ver. 1.3
1. INTRoDUCTIoN
By combining the KX12 with active K-array subwoofers, three new portable systems - which differ in size
of the subwoofers and number of KX12 units used - have been added to K-array’s portfolio.
With powered subwoofers that maintain the same digital editing features of all K-array active subwoofers,
the KRX systems feature an integrated touch screen, providing intuitive control over the main DSP
functions, such as input/output levels, signal routing, offset delays for subwoofer and mid-high speaker
output (up to 10 ms each) and overall system delays (up to 330 ms). All DSP functions, including EQ,
can also be controlled remotely via software through USB or RS485 (3 pin XLR).
The KRX202 is the smallest of these three new systems and is composed of one KX12 standing on
a KMT18 18” subwoofer by means of an extendable pole and proper joining and stacking hardware.
Possible applications are DJ use, clubs and anywhere a lot of pressure is needed close to the speakers.
The KRX402 is the middle range system that delivers more pressure and a more extended bass response
than the smaller KRX202. It is comprised of two KX12 speakers paired with one 21” KMT21 subwoofer.
The largest of the three systems is the KRX802. With three KX12 speakers combined with a KMT218
subwoofer, the system converts into a line array that delivers maximum SPL, very low frequency and
best bass response. No longer a point source, the KRX802 covers larger distances with higher pressure
in larger venues.
2. KEY fEATURES
• Unique performance-to-size ratio
• Variable angle array design
• Stainless steel chassis
• Customized colors (only under specific request)
3. APPLICATIoNS
• Clubs, DJ set
• Portable and installed AV systems
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KRX PORTABLE SYSTEMS Ver. 1.3
4. SAfETY INfoRMATIoN
Read these instructions - Keep these instructions - Heed all warnings
Warning. Failure to follow these safety instructions could result in fire,
shock or other injury or damage to the device or other property.
The lighting flash with arrowhead symbol within
This symbol alerts the user to the presence of
recommendations about the product’s use and
maintenance.
an equilateral triangle is intended to alert the
user to the presence of not isolated, dangerous
voltage within the product enclosure that may
be of magnitude to constitute a risk of electrical
shock.
IMPORTANT SAFETY INSTRUCTIONS
• Read these instructions.
• Keep this instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
• 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 are provided for your safety. If the provided plug does not
fit into your outlet, consult an electrician for replacement of the obsolete outlet.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Use only with the cart, stand, tripod, bracket, or table specified 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.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified 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.
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KRX PORTABLE SYSTEMS Ver. 1.3
WARNING
• Since the device is a CLASS I apparatus, it must be only connected to an AC three-wire grounding outlet.
If your outlet isn’t grounded, contact a licensed electrician to replace it with a property grounded
outlet.
• To reduce the risk of electric shock, unplug the AC mains connector before installing audio cable.
Reconnect the power cord only after making all signal connections. Do not use the product if the
power cord is broken or frayed. Protect the power cord from being walked upon or pinched.
• To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug
from the AC receptacle.
• Avoiding hearing damage. Professional loudspeakers are capable of producing extremely high sound
levels and should be used carefully. Never stand close to loudspeakers driven at high volume. Set
the volume to a safe level. You can adapt over time to a higher volume of sound that may sound
normal but can be damaging to your hearing. Hearing loss get worse every time you’re exposed to a
sound level of 90 dB or over for an extended period of time. If you experience ringing in your ears
or muffled speech, stop listening and have your hearing checked. The louder the volume, the less
time is required before your hearing could be affected.
• Voltage requirement. Make sure that the supplied voltage stays within the specified range. Verify that
your mains connection satisfies the power ratings of the device.
• Only connect the power supply to an appropriate power outlet
• Do not install the amplifier in wet or humid locations without using weather protection.
• TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, do not expose this apparatus to rain or moisture
and objects filled with liquids, such as vases, should not be placed on this apparatus.
• The main plug of the power supply cord shall remain readily accessible.
CAUTION
• Choking Hazards. This device contains small parts, which may present a choking hazard to small
children. Keep the device and its accessories away from small children.
• It is important that loudspeaker systems are used in a safe manner.
• Do not make repairs yourself. Caution, risk of electric shock. Do not open the device, it contains
potentially hazardous voltage. Never attempt to disassemble, repair or modify the system yourself.
Disassembling the unit may cause damage that is not covered under the warranty. The device
contains no user-serviceable parts. Repairs should only be performed by factory trained service
personnel. Do not plug the power cord in if you suspect that your device needs service or repair.
• Sound distortion. Do not operate speakers for an extended period of time with sound distortion. This
is an indication of malfunction, which in turn can generate heat and result in a fire.
• Cooling. During the use, it is normal for the device to get warm. The exterior of the device functions
as a cooling surface that transfers heat from inside the unit to the cooler air outside. The device
should be placed so that its location does not interfere with its proper cooling. For example, the
device shouldn’t be placed next to surfaces that can interfere with the properly cooling of the rear
panel’s radiators. When operating, the device should not be cover with additional protections.
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KRX PORTABLE SYSTEMS Ver. 1.3
• Temperature. Operate the device in a place where the temperature is between -20°C and 35°C (-4°F
to 95° F). Avoid dramatic changes in temperature or humidity when using it, as condensation may
form on or within the device.
• Take care not to spill any food or liquid through the device’s grill. Do not attempt to dry the device
with an external heat source, such as a hair dryer.
• Carrying, handling and installing the device. The device contains sensitive components. Do not drop,
disassemble, open, crush, bend, deform, puncture, shred, incinerate, paint, or insert foreign objects
into it. If your device has been dropped or damaged unplug the power cable immediately.
• Set up. Set up your device on a stable retaining horizontal surface. If combined or mechanically
connected with other products, always verify the stability of the resulted system. Install the unit
only in a location that can structurally support the weight of the unit, far away from people who
can interfere with the stability of the system. In case of outdoor installation, protect the device from
rain and moisture. Assure that the wind does not interfere with the system’s stability, taking extra
securities like chains, weights, ropes or any other certified anchoring systems. Doing otherwise may
result in the unit falling down, causing personal injury or property damage or even death. The system
should only be suspended by qualified personnel following safe rigging practices. Secure fixings
to the building structure are vital. To clarify any doubt you may have, seek help from architects,
structural engineers or other specialists.
• This audio system is not intended for use in the operation of nuclear facilities, aircraft navigation
or communication systems, air traffic control systems,or for any other uses where the failure of the
audio system could lead to death, personal injury, or sever environmental damage.
5. UNPACKING
Each K-array speaker is built to the highest standard and thoroughly inspected before leaving the
factory. Upon arrival, carefully inspect the shipping carton, then examine and test your new amplifier.
If you find any damage, immediately notify the shipping company. Only the consignee may institute a
claim procedure regarding the system’s electronic equipment.
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KRX PORTABLE SYSTEMS Ver. 1.3
6. PRoDUCT PHYSICAL ovERvIEw
6.1 KR X 202
13,4in
7,9in
200,5mm
12,6in
320mm
64,4
1635
-
340mm
51,8
1315
23,5in
596,5mm
18,3in
465mm
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KRX PORTABLE SYSTEMS Ver. 1.3
6.2 KRX402
81,0
2057
-
68,4in
1737mm
13,4in
340mm
7,9in
200,5mm
12,6in
320mm
30,0in
763mm
21,9in
555mm
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KRX PORTABLE SYSTEMS Ver. 1.3
6.3 KRX802
mm
91,0
2311
-
78,4in
1991mm
13,4in
340mm
7,9in
200,5mm
12,6in
320mm
23,6in
600mm
36,7in
932,5mm
18,9in
480mm
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KRX PORTABLE SYSTEMS Ver. 1.3
7. wIRING
KX12’s internal wiring is designed to pick up the audio power signal from pins 1+ / 1- of a Speakon NL4
connector. Pins 1+ and 1-, such as pins 2+ and 2-, are directly wired from one socket to the other, so that
the two sockets are equivalent and can connect the speaker to the amplifier or to another KX12 driven
in parallel by the same amplifier channel.
Connect the Subwoofer’s Speaker Output to the first unit of the cluster with the provided long two-poles
Speakon cable and connect the other units together with the provided short two-poles Speakon cables.
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KRX PORTABLE SYSTEMS Ver. 1.3
8. SYSTEM SETUP
The next step-by-step instructions demonstrate how to mount a KRX802. The mounting procedure for
the other systems is not dissimilar.
1. Screw the pole into the subwoofer.
2. Insert the K-FLY22 adapter and screw the knob.
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KRX PORTABLE SYSTEMS Ver. 1.3
4. Insert the first KX12 unit. Secure with the two 8x40 piston pins provided with the system.
5. Insert two joint blocks and secure each of them with the two 5x30 piston pins provided with the
system. The orientation of the joint blocks and the holes used will affect the angle between the
K-FLY22 and the KX12, as shown in the next page.
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KRX PORTABLE SYSTEMS Ver. 1.3
5. Repeat Steps 4 and 5 to add the other units.
Please secure the subwoofer to a stable
surface with chains, ropes or any other
certified anchoring systems.
The pictures below show how to regulate the angles
If you want the to angle the speaker by 0°, +5°, +10° or +15°, position the joint block so that
the letter “A” is at the bottom. Plug a piston pin in the hole labeled “A”, adjust the angle of
the speaker and plug the second piston pin in the hole corresponding to the desired angle.
If you want the to angle the speaker by -5°, -2.5°, +2.5° or +7.5°, position the joint block so
that the letter “B” is at the bottom. Plug a piston pin in the hole labeled “B”, adjust the angle
of the speaker and plug the second piston pin in the hole corresponding to the desired angle.
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KRX PORTABLE SYSTEMS Ver. 1.3
9. AMPLIfIER
9.1 AC PowER
The amplifier module and any audio equipment connected to it (mixing consoles, processors, etc.) must
be properly connected to the AC power distribution, preserving AC line polarity. Every grounding point
must be connected to a single node or common point using the same cable gauge as the neutral and
line cable. Bad grounding connections between speakers and the rest of the equipment may produce
noise, hum or serious damage to the input/output stages in the system’s electronic equipment.
Before applying AC to any K-array self-powered speaker, be sure
that the voltage potential difference between neutral and earth
ground is less than 5 VAC.
9.2 voLTAGE REQUIREMENT
The amplifier’s auto-range power supply feature allows the amp unit to operate safely and with no audio
discontinuity when the AC voltage stays within a nominal range of 100 - 240 V (operating range 85 265 V) at 50 to 60 Hz.
Please verify that your AC main connections are capable of satisfying the power rating for the device.
CAUTION. Do not connect the system to AC power mains
exceeding 265 V. Doing so will cause significant damage to the
device and create serious risk for users!
9.3 CURRENT REQUIREMENT
The amplifier presents a dynamic load to the AC mains, drawing additional current as operating levels
increase. Different cables and circuit breakers heat up at varying rates, so it is essential to understand
current ratings and how they correspond to circuit breaker and cable specifications. Maximum continuous
RMS current - measured over a period of at least ten seconds - is used to calculate the temperature
increase in cables, which drives the proper size and gauge cable and rating for slow-reacting thermal
breakers. Maximum burst RMS current - measured over a period of approximately one second - is used
to select the rating for fast reacting magnetic breakers.
For best performance, voltage drops should not exceed 10% at 100 V or 10% at 230 V. The minimum
electrical service amperage required by a K-array loudspeakers system is the sum of their maximum
continuous RMS current. K-array recommends allowing an additional 30% above the minimum amperage
to prevent peak voltage drops at the service entry.
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KRX PORTABLE SYSTEMS Ver. 1.3
9.4 PRoTECTIoN CIRCUITRY
Both the Power supply and the amplifier sections are equipped with several protection circuits.
Power supply protections aim to isolate a faulty section in electrical power system from the rest of
the device in order to prevent the propagation of the fault and limit device damages. They comprise
overcurrent, overvoltage and thermal protections.
Amplifier protections are triggered by audio signal current and voltage – by comparing input and output –
and NTC (Negative Temperature Coefficient) thermistors. A Peak Current Shut Down and a Temperature
Protection Limiter protect the output stage.
High frequency stationary signals, like steady sinusoidal signals – improperly referred as continuous or
permanent signals – with high amplitude tend to stress the amplifier section of the modules as well as
the loudspeakers voice coils. When a high frequency stationary loud signal is feed into the amplifier a
dedicated Limiter limits its mean current depending on its level and frequency.
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KRX PORTABLE SYSTEMS Ver. 1.3
9.5 SUBwoofER REAR PANEL
19
14
15
1
5
4
2
3
9
5.5 A
2.9 A
16
10
14 A
1.6
16 A
230
3.5
17
11 12
20
13
18
6
7
8
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KRX PORTABLE SYSTEMS Ver. 1.3
1) CH1 Line Input. XLR line level input with +4 dBu sensitivity.
2) CH2 Mic/Line Input. XLR input, with selectable sensitivity for Mic (-30 dBu) or Line (+4 dBu).
3) Mic/Line switch. Selects CH2 input sensitivity for Mic ( -30 dBu) or Line ( +4 dBu) level.
4) Phantom Power switch. Turns phantom power (48V) on/off on CH2 input.
5) Limiting LEDs. Independent LEDs for the CH1 and CH2 inputs, which blink when the optical limiter
engages to protect the corresponding preamp circuit. Limiter threshold is +5 dBu.
6) CH1 Parallel Line Out. XLR parallel output providing a direct signal from the CH1 Line Input. This
output cannot be processed or controlled via the K-Framework software.
7) DSP Out. When the DSP Out switch is not pressed (off), this connector provides a direct signal
from the CH2 input. At the moment this connector doesn’t output any signal if the DSP Out switch
is pressed (on). This function will be useful for future applications.
8) DSP Out Switch. See point 7.
9) AES/EBU Digital Input. XLR input connector for two-channel AES/EBU digital audio, accepting
sample rates up to 96 kHz.
10) AES/EBU Digital Output. XLR output, providing two-channel digital audio from AES/EBU Input,
This output cannot be processed or controlled via the K-Framework software.
11) REMOTE RS485 Link Input. XLR input for connecting the KMT from another RS485 device in a
K-Framework network. RS485 Link Input can also be used to connect a computer running the
K-Framework software (requires K-USB USB-to-RS485 adapter).
12) REMOTE RS485 Link Output. XLR output for connecting additional RS485 devices in a K-Framework
network.
13) REMOTE USB Input. Connects a computer running the K-Framework software, for remote control
of the KMT. Users can manage an entire network of RS485 devices with one PC connected via
USB.
14) Speaker Out. Powered Speakon output, used to drive passive speakers, like a mid-high module
or a passive subwoofer.
15) Power switch. Turns the KMT system on and off.
16) AC Input. PowerCon input for AC power. See p. 11 for voltage and power requirements.
17) AC Link. PowerCon output for feeding AC mains power to additional K-array components with a
PowerCon AC input socket.
18) Power On LED. Indicates the system is ON.
19) TOUCH SCREEN Control panel. Provides access to the main functions of the DSP on board (see
Section 8)
20) 5 Volt Power Connector. Provides 5VDC/500mA to power e-fun accessories.
IMPORTANT NOTE
By default, the analog channel CH2 and the digital channel CH4 are not routed
to any output. To activate them, go to the Matrix Page on the LCD screen (see
Chapter 8).
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KRX PORTABLE SYSTEMS Ver. 1.3
9.6 RS485 NETwoRK
The RS485 Link Input and The RS485 Link Output on the rear panel allow to create a network of K-array
devices that users can manage with a PC running the K-Framework software. All devices can be linked
with standard XLR cable.
The PC can be connected to the network either with USB cable or XLR cable (requires K-USB USB-toRS485 adapter accessory) as shown in the diagrams below.
USB cable
PC connected via USB cable
K-U SB
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
XLR cable
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
XLR cable
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
XLR cable
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
XLR cable
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
XLR cable
PC connected via XLR cable + K-USB accessory
Attention. Make sure that you have set a different ID number on each device
before connecting them to a PC running the K-framework. See the INFO section in
Chapter 10. for details.
5.5 A
2.9 A
14 A
1.6
16 A
230
3.5
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KRX PORTABLE SYSTEMS Ver. 1.3
10. ToUCH SCREEN fUNCTIoNS
The main functions of the onboard DSP can be managed with the integrated touch screen. Functions
are grouped into six pages, shown as icons on the Home page.
HoME PAGE
To reach the Home page from any other page,
touch the Home button.
LEvELS
MATR IX
The Levels page allows users to independently manage
the amplitude of the four input channels and the two
output channel of the amplifier.
CH1 and CH2 are the two analog inputs, while CH3 and
CH4 are the two channels of the AES/EBU digital input.
A1 controls the output level sent to the subwoofer and A2
controls the output level sent to the speakers connected
to the Speaker Out.
Click the arrow button on the top right corner to switch
between the Input levels page and the Output levels
page.
The Matrix page allows users to manage the routing of
the four input channels to the subwoofer, to the speaker
connected to the Speaker Out and to the XLR DSP Out.
In the example shown here, the analog signal on the input
channel 1 and the digital signal on the input channel 3
are sent to the subwoofer while the analog signal on the
input channel 2 and the digital signal on the input channel
3 are sent to the speakers connected to the Speaker Out.
All inputs channels are also summed and sent to the XLR
DSP Out.
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KRX PORTABLE SYSTEMS Ver. 1.3
DEL AY
The Delay page allows users to independently set the
delays for the two output channels driving the subwoofer
and the speakers connected to the Speaker Out (up to
3.5 mt) and for Channel 1 and Channel 2 input channels
(up to 114 mt).
Pressing on a delay value, users can set the delay in
milliseconds or meters. Press the OK button to return to
the Delay page.
CoNfIGURATIoN
When you buy a KRX system, the correct preset is
already loaded and the system is ready to use. But it
can happen that you want to connect another model of
K-array speaker to the subwoofer.
In this case, go to the Configuration page and press
the SETUP button. Insert the model and the number of
speakers connected to the Speaker Out.
Press the NEXT button on the top right corner.
Press the APPLY button and the DSP will automatically
adjust the output gain and the crossover to match the
requirement for the speakers connected.
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KRX PORTABLE SYSTEMS Ver. 1.3
PRESET
The Preset page allows users to load presets stored
on-board.
INfo
The Info page contains information about the
current software and firmware, the current preset
loaded and the Board ID of the device.
The Board ID is a number which identify the device
when it is connected in a K-framework network
(see Paragraph 7.6). Make sure that each device in
the network has a different ID number.
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KRX PORTABLE SYSTEMS Ver. 1.3
11. SERvICE
To obtain service:
1) Contact the official K-array distributor in your country. Your local distributor will direct you to the
appropriate service center.
2) If you are calling for service, please have the serial number(s) of the unit(s) available for reference.
Ask for Customer Service and be prepared to describe the problem clearly and completely.
3) If the problem cannot be resolved over the phone, you may be required to send the unit in for
service. In this instance, you will be provided with an RA (Return Authorization) number which should
be included on all shipping documents and correspondence regarding the repair. Shipping charges are
the responsibility of the purchaser.
Any attempt to modify or replace components of the device will invalidate your warranty. Service must
be performed by an authorized K-array service center.
Cleaning:
Use only a soft, dry cloth to clean the product. Do not use any solvents, chemicals, or cleaning
solutions containing alcohol, ammonia, or abrasives. Do not use any sprays near the product or
allow liquids to spill into any openings.
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