K-array ninja kj50vb User manual

REV. A ENGLISH

CONTENTS
m
m
m
m
m
m
m
m
s
s
1. Introduction p. 5
4.
6. Key Features and Applications p. 7
7. Wiring p. 8
8. Coverage Patterns p. 9
p. 9
p. 11
p. 11
p. 12
9. Specifications p. 13
10. Service p. 14
2. Unpacking p. 5
3. Symbols p. 6
Safety p. 6
5. Warranty p. 7
8.1 Horizontal switch setting
8.2 Vertical DSP setting
8.3 Ceiling line array configuration
8.4 Horizontal line array configuration
K
array
p. 3

Congratulations on your purchase of the K-Array KJ50vb Variable Beam, High Power speaker system.
Along with its ultra-slim profile, substantial output capability and smooth frequency response over the full
vocal range, the KJ50vb has the unique capability to switch-select the Horizontal coverage pattern and to
vary the Vertical coverage through DSP control.
The KJ50vb is specifically designed to work with the K-Array KA7-7 four-channel power amplifier. The KA7-7
provides the discrete pre-set DSP control settings for speaker protection, equalization and the vertical
beamwidth and steering capabilities.
The KJ50vb speaker system is capable of operating with other power amplifiers and DSP control systems.
For these applications please contact K-Array technical support at [e-mail].
Each K-array loudspeaker is built to the highest standard and thoroughly inspected before leaving the factory.
Carefully inspect the shipping carton before opening it, and then examine and test your new loudspeaker. If
you find any damage immediately notify the shipping company. Only the consignee may institute a claim for
damages incurred in shipping. It is suggested that you retain the original packaging so that the system can be
repacked at a future date if necessary.
Please note that K-array and its distributors cannot accept any responsibility for damage to any returned
product through the use of non-approved packaging.
2. UNPACKING
1. INTRODUCTION
Variable Beam High Power Speaker System
p. 5

3. SYMBOLS
!
This symbol, wherever it appears, alerts you to
important operating and maintenance istructions
in the accompanying literature. Read the manual!
Separate collection of electrical and
electronic devices.
For information about the disposal of
Wa s t e E l e c t r i c a l a n d E l e c t r o n i c
Equipment (WEEE), please refer to the
website at
www.scanning.datalogic.com
This symbol alerts the user
t o t h e p r e s e n c e o f
recommendations about
p r o d u c t ' s u s e a n d
maintenance.
This device complies with Restriction of
Hazardous Substances Directive.
The item meets all the
e s s e n t i a l " H e a l t h a n d
Safety" requirements of the
r e v e l a n t E u r o p e a n
Directives.
4. 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 a long
period.
Never stand close to loudspeakers driven at high level.
Ensure that the floor or stage is level and solid.
Be aware that speakers producing very high power levels can move or creep. To avoid this, place friction
material between the floor and speaker.
: Suspending the system should only be done by qualified personnel following safe rigging
practices. Secure fixings to the building structure are vital. Seek help from architects, structural engineers or
other specialists if in any doubt.
WARNING
Do not operate the speaker for an extended period of time with the sound distorting. This is an indication of
malfunction, which in turn can cause heat to generate and result in a fire.
p. 6

5. WARRANTY
K-array KJ50vb are warranted against manufacturing defects in materials or craftsmanship over a period of
from the date of original purchase. During the warranty period K-array will, at it's 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 authorised K-array service agent or distributor. K-array cannot be held
responsible for defects caused by unauthorised modifications, improper use, negligence, exposure to
inclement weather conditions, act of God or accident, 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.
2
years
To obtain warranty service contact your dealer or distributor for repair or placement.
!
!
!
!
!
!
!
!
!
Selectable horizontal coverage
Variable vertical coverage from
external DSP control. +/- 15° focus area
Multiple 2" long excursion full-range drivers
Smooth frequency response
Electronically protected
High dynamic range capability
Top quality components for outstanding
performance
Ulra- thin frame for invisible installation
Available in white
6. FEATURES & APPLICATIONS
!
!
!
!
!
TV stage monitoring
Live stage monitoring
Ceiling PA or monitor installations
Permanent installations
Under balcony applications
Features Applications
p. 7

2 x parallel IN/OUT
8-PIN SPEAKON
AMPLIFIER
CH. 1 & 2
SPEAKON 1
AMPLIFIER
CH. 3 & 4
SPEAKON 2
SPEAKER
INPUT
7. WIRING
CH 1,2 OUT
CH 3,4 OUT
CH3+
CH1+
CH2+
CH3-
CH1-
CH2-
2+
2+
1+
1+
2-
2-
1-
1-
CH4+
CH4-
CH1
CH2
CH3
CH4
1+
1-
2+
2- 3+ 3-
4+
4-
8-pin speakon
4-pin speakon
4-pin speakon
4-pin speakon
4-pin speakon
8-pin speakon
Signal input to the KJ50vb is
vi a an 8 -p in S pe ak on
connector with a parallel
w i r e d T h r u o u t p u t f o r
extending to additional
cabinets. Four amplifier
channels are employed. The
recommended amplifier is
the K-Array KA7-7 four-
channel amplifier, which
supplies 350 watts/channel
into a 4 ohm load. The KA7-7
h a s D S P p r e s e t s
specifically designed for the
K J 5 0 v b , i n c l u d i n g t h e
Vertical focus and steering
features. The wiring is via 2 x
4-pin Speakon connectors.
See the wiring diagram.
To c o n n e c t t o o t h e r
amplifiers follow the same
p i n c o n f i g u r a t i o n .
For use with other DSP
controllers contact tech@k-
array.com
p. 8

HORIZONTAL COVERAGE
CH 3
CH 4
MID-FAR FIELD
FAR FIELD
CH 4
CH 3
SPOT
FLOOD
SPOT
FLOOD
HORIZONTAL COVERAGE
CH 2
NEAR FIELD
MID-NEAR FIELD
CH 1
CH 2
CH 1
SPOT
FLOOD
SPOT
FLOOD
HORIZONTAL COVERAGE
CH 3
CH 4
MID-FAR FIELD
FAR FIELD
CH 4
CH 3
SPOT
FLOOD
SPOT
FLOOD
HORIZONTAL COVERAGE
CH 2
NEAR FIELD
MID-NEAR FIELD
CH 1
CH 2
CH 1
SPOT
FLOOD
SPOT
FLOOD
8. COVERAGE PATTERNS
8.1. HORIZONTAL SWITCH SETTING
Horizontal coverage can be
selected using the 4 x switches
located on the back of the speaker
cabinet.
These can be set for ‘Spot’ 10° or
‘Flood’ 100°.
The switches can be safely
activated while the speaker is
receiving signal. (Please note the
Safety Warning regarding hearing
damage).
The combined Mode allows you to
select a combination of Near and
Far Field Coverage.
p. 9

HORIZONTAL COVERAGE
CH 3
CH 4
MID-FAR FIELD
FAR FIELD
CH 4
CH 3
SPOT
FLOOD
SPOT
FLOOD
CH 2
CH 1
HORIZONTAL COVERAGE
NEAR FIELD
MID-NEAR FIELD
CH 1
CH 2
SPOT
FLOOD
SPOT
FLOOD
p. 10

Vertical coverage is controlled
by DSP settings in the KA7-7
amplifier from 70° ‘ ’ to 10°
‘ ’
In ‘ ’ Mode the Vertical
focus can be adjusted by +/- 15°
Wide
Narrow
Narrow
8.2. VERTICAL DSP SETTING
A Ceiling Line Array Configuration is a unique
application of the KJ50vb.
Because of its very thin profile the KJ50vb is
perfectly suited for low-ceiling venues.
The vertical steering capability means that the
speakers do not need to be located directly
overhead but can be positioned off the stage or
dance floor.
8.3. CEILING LINE ARRAY CONFIGURATION
70° 10°
p. 11

CH. 1 near field
CH. 2 mid- near field
CH. 3 mid-far field
CH. 4 far field
Amp. Speakon 1
Ch.s 1 & 2
Amp. Speakon 2
Ch.s 3 & 4
!
8.4. HORIZONTAL LINE ARRAY CONFIGURATION
The Horizontal Line Array Configuration is
another unique application of the KJ50vb.
Up to four speakers can be driven and controlled
by a single KA7-7 amplifier.
The cabinets should be positioned together and
switched to Horizontal t’ position.‘Spo
p. 12
FOUR-CHANNELS
AMPLIFIER
FOUR-CHANNELS
AMPLIFIER
FOUR-CHANNELS
AMPLIFIER
FOUR-CHANNELS
AMPLIFIER

9. SPECIFICATIONS
p. 13
KJ50VB
Acoustics
Speakers power handling 4 x 150 W(AES)
Max power 4 x 200 W 1
Impedance
Frequency range 150 Hz - 20 KHz
SPL 1W/1mt 98 dB 2
Maximum SPL 124 dB continuous - 130 dB peak
Coverage
Horizontal selectable : Spot (10°) / Flood (100°)
Vertical DSP dependent 10°’Narrow’ to 70° ‘Wide’, +/- 15° variable focus in ‘Narrow’ mode
Crossover
Type External Crossover required
Frequency 150 Hz, 24 dB/oct suggested minimum
Transducers
Full-range 36 x 2” neodymium magnet 0.75” VC long-excursion speakers
Audio Input
Connectors 1 x 8-pin Speakon NL8 input
1 x 8-pin Speakon NL8 Thru
Wiring (1+ 1-) = (2+ 2-) =
(3+ 3-) = (4+ 4-) =
Selection Switch
Coverage
Type (with dedicated preset)
Physical
Dimensions 50.3 x 43.3 x 6.1 cm (19.80” x 17.05” x 2.40”)
Weight 10 Kg (22.5 lbs)
Notes for data
1. Maximum RMS applicable power for a musical signal, the reference signal is the one proposed by EIAJ standard.
2. Measured @4 mt then scaled @1 mt
New materials and design are introduced into existing products without previous notice. Present systems may differ in some respects
from those presented in this brochure.

10. SERVICE
p. 14
To obtain service:
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.
1) Contact the official K-array distributor in your country that direct you to the service centre.
2) If you are calling for the service, have the serial number(s) of the unit(s) at hand 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 must return the unit for service.
4) You will be given an RA (Return Authorization) number for job tracking. Refer to this number on shipping
materials and in all correspondence concerning the repair. Shipping charges are the responsibility of the
purchaser.
Cleaning:
•Clean the product enclosures using only a soft, dry cloth.
•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.

The contents of this manual are furnished for
informational purpose only. Hp Sound Equipment s.r.l.
assumes no responsability for any errors or inaccuracies
that may appear in this manual.
Hp Sound Equipment s.r.l. reserves the right to make
modifications without prior notice.
HP Sound Equipment s.r.l. www.k-array.com
Viale Roma 7/i 50037 San Piero a Sieve (Firenze) Italy - tel [phone] fax e-mail: [e-mail][phone]
K-array declares that this device is in compliance
with the applicable CE standards and regulations.
Before putting the device into operation, please
ob s e r v e t he r es pe c t i v e c ou nt ry - s p e c i f ic
regulations!
Approval
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.
WEEE
p. 15

www.k-array.com
by
HP Sound Equipment s.r.l.
Viale Roma 7/i
50037 San Piero a Sieve (Firenze)
Italy
tel [phone] fax [phone]
e-mail: [e-mail]
K
array