K-array KR400S User manual

USER MANUAL - english version
KR400S
PRELIMINARY

PRELIMINARY

CONTENTS
PRELIMINARY
SYMBOLS 6
1. INTRODUCTION (KL21ma and the KR400S system) 8
2. APPLICATIONS 8
3. KEY FEATURES 9
4. UNPACKING 9
5. WARRANTY 9
6. SAFETY 10
7. PHYSICAL 11
8. AMPLIFIER 13
8.1 AC POWER CONNECTOR 13
8.2 VOLTAGE REQUIREMENT 13
8.3 CURRENT REQUIREMENT 13
8.4 REAR PANEL 14
8.5 POWER CONNECTOR WIRING 15
8.6 AUDIO INPUT CONNECTOR WIRING 15
8.7 AMPLIFICATION AND PROTECTION CIRCUITRY 16
9. SYSTEM CONFIGURATION ON THE FLOOR 17
10. HANGING INSTALLATION INSTRUCTIONS 25
10. DSP CONTROL & REMOTE CONTROL 28
10.1 CLONER FUNCTION & PRESET SYSTEMS 29
11. REMOTE CONTROL SOFTWARE 29
12. PRESETS DIAGRAMS 38
13. SERVICE 41
14. KR400s TECHNICAL DETAILS 42

This symbol alerts the user to the presence of recommendations about product’s
use and maintenance.
This symbol, wherever it appears, alerts you to important operating and
maintenance instructions in the accompanying literature. Read the manual!
Warning! Dangerous voltages: RISK of electric shock.
K-array declares that this device is in compliance with the applicable
CE standards and regulations. Before putting the device into operation,
please observe the respective country-specic regulations!
WEEE
Please dispose of this product at the end of its operational lifetime by
bringing it to your local collection point or recycling centre for such
equipment.
This device complies with Restriction of Hazardous Substances Directive.
SYMBOLS
PRELIMINARY

PRELIMINARY

8
KR400S
PRELIMINARY
1. INTRODUCTION (KL21ma and the KR400S system)
The KR400S is a high performance ultra-slim powered two way system designed for small to
medium wavefront systems, in both mobile and installed applications.
The KR400S includes two KR400 satellites and 2 KL21ma powered subwoofers.
The KL21ma features a 2500 watt 21” drive unit with neodymium magnet structure and
suspension engineered for maximum linear excursion. Its ultra-light reex cabinet is tted with
four pocket handles and one 35mm pole mounting point for easy installation of the satellite
speakers.
The KR400S features a line array of 24 x 3” high efciency neodymium magnet drivers
enclosed in an ultra-strong chassis, to ensure high resistance and durability in the most
demanding working conditions.
Thanks to its true line array technologies and powerful DSP system, the KR400S achieves
outstanding power and coherence throughout the intended coverage allowing a wide dynamic
range and faithful sound reproduction.
All the components are designed by the K-array R&D department and are custom made and
tested by the K-array quality control system.
KR400S
2. APPLICATIONS
• Theatrical sound reinforcement
• Concert halls, clubs, houses of worship
• Portable and installed audio-visual systems
• Cinema and special effects

9
KR400S
PRELIMINARY
3. KEY FEATURES
• Unique performance-to-size ratio
• High power 132dB continuous, 138dB peak
• Fitted with integral handles
• Line array emission wavefront
• Integrated mounting system
• Full Aluminum ultra strong frame
• DSP on board with 16 dedicated presets
• Remote PC control software (RS485)
• Ultra fast set-up and dismantling system
4. UNPACKING
Each K-array loudspeaker is built to the highest standard and thoroughly inspected before
leaving the factory. Carefully inspect the shipping carton, then examine and test your new
loudspeaker. If you nd any damage, immediately notify the shipping company. Only the
consignee may institute a claim procedure regarding the system’s electronic equipment.
5. WARRANTY
K-array systems are warranted against manufacturing defects in materials or
craftsmanship over a period of 2 years from the date of original purchase. During the
warranty period K-array will, at its discretion, either repair or replace products which prove
to be defective provided that the product is returned in its original packaging, shipping
prepaid, to an authorized K-array service agent or distributor. K-array cannot be held
responsible for defects caused by unauthorized modications, improper use, negligence,
exposure to inclement weather conditions, acts of God or accidents, or any use of this
product that is not in accordance with the instructions provided by K-array. K-array is not
liable for consequential damages. This warranty is exclusive and no other warranty is
expressed or implied. This warranty does not affect your statutory rights.

10 PRELIMINARY
KR400S
6. SAFETY
• It is important that loudspeaker systems are used in a safe manner.
• Professional loudspeakers are capable of producing extremely high sound levels
and should be used with care. Hearing loss is cumulative and can result from levels
above 90dB if people are exposed for an extended period.
• Never stand close to loudspeakers driven at high volume.
• Suspending the system should only be done by qualied personnel following safe
rigging practices. Secure xings to the building structure are vital. Seek help from
architects, structural engineers or other specialists if in any doubt.
• Do not operate the speaker 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 re.
• Only connect the power supply to an appropriate power adapter.
• Do not install the speaker in wet or humid locations without using weather protection.
• Do not allow water or any foreign object to get inside the speaker. Do not put objects
containing liquid on, or near, the unit.
• To reduce the risk of overheating the amplier, avoid exposing it to direct sunlight.
Do not install the unit near heat emitting appliances, such as a room heater or stove.
• No naked ame sources such as lighted candles should be placed near the device.
• The speaker should be placed so that its location does not interfere with its proper
cooling.
• Do not attempt to disassemble the unit. The unit contains no user-serviceable parts.
Repairs should only be performed by factory trained service personnel.
• Be sure that the adapter has the correct voltage value.
WARNING

11
PRELIMINARY
KR400S
7. PHYSICAL
77.7 cm
77.7 cm
77.7 cm
55.5 cm
55.5 cm
55.5 cm
55.5 cm
30.60”
30.60”
30.60”
21.85”
21.85”
21.85”
21.85”
weight: 39 kg (86 lbs)
KL21ma

12 PRELIMINARY
KR400S
265 cm
100.5 cm
100.5 cm
205.2 cm
8.8 cm
8.8 cm
8.8 cm
11.5 cm
11.5 cm
19.88”
39.57”
39.57”
80.90”
3.56”
3.56”
3.56”
4.53”
4.53”
weight: 2 X 9 kg (2 x 19.84 lbs)
weight: 57 kg (152.66 lbs)
KR400

13
PRELIMINARY
KR400S
8. AMPLIFIER
8.1 AC POWER CONNECTOR
8.2 VOLTAGE REQUIREMENT
8.3 CURRENT REQUIREMENT
The amplier module and the rest of the audio equipment connected to it (mixing
consoles, processors, etc.) must be connected to the AC power distribution in a
proper way, preserving AC line polarity and connecting earth ground such that all
grounding points are connected to a single node or common point using the same
cable gauge as the neutral and line(s) cables. Bad grounding connections between
speakers and the rest of the audio system may produce noise, hum and/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.
KL21ma operates safely and without audio discontinuity if the AC voltage
stays within 85 and 270V, at 50 or 60 Hz.
The device is set by default to be connected to 230V AC Power.
Verify that your mains connection is capable to satises the power ratings of
the device.
CAUTION
Connecting the system to an AC power mains with a
voltage exceeding 270V will cause signicant damage to
the device and create a serious risk for users!
The KL12ma presents a dynamic load to the AC mains, which causes the amount of
current to uctuate between quiet and loud operating levels. Since different cables
and circuit breakers heat up at varying rates, it is essential to understand the types of
current ratings and how they correspond to circuit breaker and cable specications.
The maximum continuous RMS current is the maximum RMS current in a period of
at least ten seconds. It is used to calculate the temperature increase in cables, which
is used to select cables that conform to electrical code standards. It is also used to
select the cable size and gauge, and the rating for slow-reacting thermal breakers.
The maximum burst RMS current is the maximum RMS current in a period of ap-
proximately one second. It is used to select the rating for magnetic breakers. The
maximum instantaneous peak current during burst is used to select the rating for fast
reacting magnetic breakers.

14 PRELIMINARY
KR400S
For best performance, the AC Cable voltage drop should not exceed 10% at 115V
and 5% at 230V.
The minimum electrical service amperage required by a K-array loudspeakers
system is the sum of their maximum continuous RMS current. We recommend
allowing an additional 30% above the minimum amperage to prevent peak voltage
drops at the service entry.
900VA(>10 sec) - 3500VA (<1 sec)
KL21ma max continuous apparent power (VA)
8.4 REAR PANEL
125678910
111213 34
1. LED pointer ON/OFF
2. Speakon power output. To use
with KR400 satellite or with KL21
passive subwoofer.
3. Address selector,
(rotary x10 - x1)
4. Preset selector,
press one to change, keep 10 sec. to store
5. ID number for remote control
6. Preset in use
7. RS485 connections for remote
control (don-t connect to LAN port)
8. Input PAD level
9. Ground lift switch
10. Balanced XLR IN/OUT parallel
11. PowerCon Input
12. PowerCon parallel Output
(max 5A @110V)
13. Power switch

15
PRELIMINARY
KR400S
8.5 POWER CONNECTOR WIRING
8.6 AUDIO INPUT CONNECTOR WIRING
The KL21ma’s ampliers receive DC power from the 3-pin blue PowerCon connector
on their back panel. The white PowerCon connector is a parallel OUTPUT for
supplying power to other devices (max 5A @110V supported). When AC power
is applied to the speaker, the auto-range power supply automatically selects the
correct operating voltage.
To create your own power cables, please use the following wiring diagrams:
The Audio section includes a female balanced XLR connector and a male XLR
connector wired in parallel. Thanks to these connectors it is possible to feed a
module and send the same signal to another one through the LINK connector. It is
possible to connect up to 30 different modules in parallel on the same balanced line
(with a source of 600 ohm output impedance). A Level Control potentiometer (PAD)
allows different set levels. In order to create your own signal cables, please use the
following wiring diagrams:
brown = hot
blue = neutral
yellow/green =
earth ground
hot
XLR connector
grd
cold
hot grd
cold
21
3
2
1
3
INPUT PARALLEL
OUTPUT

16 PRELIMINARY
KR400S
The KL21ma is powered by a 2-channel high power digital amplier feeding the
connected KR400 modules with a power output of 1800W in each channel.
All the specic functions for the KL21ma, such as crossovers, frequency, phase
response, and driver protection are determined by a DSP processor installed inside
the amplier.
The devices have three different types of audio signal limiter. The Clip limiter, the
Average Power limiter and the High Frequency limiter reduce the risk of damaging
the components of the speakers.
A Peak Current Shut Down acts as output stage switching process inhibition that
resets itself after 2 seconds. The tripping point is at 52A.
A temperature protection limiter ensures the output stage gain stays below a
temperature of 85° (approximate temperature of output power device).
8.7 AMPLIFICATION AND PROTECTION CIRCUITRY

17
PRELIMINARY
KR400S
9. SYSTEM CONFIGURATION ON THE FLOOR

18 PRELIMINARY
KR400S

19
PRELIMINARY
KR400S
A

20 PRELIMINARY
KR400S
Speakon
power OUT