K-array KU44 User manual

KU44 Ver. 1.1
KU44
USER GUIDE
English

KU44 Ver. 1.1
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TABLE OF CONTENTS
SYMBOLS ................................................................................ 3
1. INTRODUCTION ..................................................................... 4
2. KEY FEATURES ...................................................................... 4
4. pACKAgE CONTENTS .............................................................. 4
3. AppLICATIONS....................................................................... 4
5. SAFETY INFORMATION............................................................ 5
6. UNpACKINg ......................................................................... 6
7. p h Y S I C A L ............................................................................. 6
7.1 MOUNTINg SCREw hOLES FOR ACCESSORIES ............................................. 7
8. wIRINg ................................................................................ 8
8.1 K-2SpK ACCESSORY ............................................................................. 9
9. SET-Up AND CONFIgURATIONS ...............................................10
9.1 SUSpENDINg FROM ThE FLY-BAR ...........................................................10
9.2 hANgINg ON ThE wALL ..................................................................... 11
9.3 RUBBER FEET ................................................................................... 11
10. SERVICE ............................................................................ 12
11. TEChNICAL SpECIFICATIONS................................................... 13
12. CERTIFICATION.................................................................... 14

KU44 Ver. 1.1
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This symbol alerts the user to the presence of recommendations about
product’s use and maintenance.
This symbol alerts the user to the presence of recommendations about the
product’s use and maintenance.
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!
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 device complies with Restriction of Hazardous Substances Directive.
SYMBOLS
Warning! Dangerous voltages: RISK of electric shock.
Terminals marked with this symbol are HAZARDOUS LIVE and the external
wiring connected to these terminals requires installation by a qualified
professional or the use of ready-made leads or cords.

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1. INTRODUCTION
2. KEY FEATURES 3. AppLICATIONS
K-array has created a thin subwoofer to complement its notable Slim Array Technology incorporated in
its speakers. The KU44 line array element is an extremely compact, array-able bass element designed
to combine with mid-high speakers to provide a full range frequency response with prodigious output
in a virtually invisible profile.
The line source sub has a frequency range of 50 Hz to 150Hz and is comprised of two 4” neodymium
transducers and two 4” passive radiators engineered for maximum linear excursion and minimum residual
noise.
For easier use and integration with all KA amplifiers, the KU44 allows the user to choose between two
different values of impedance (8/32 Ω). At 32 Ωas many as eight KU44 can be powered off a single
KA amplifier channel.
KU44 is made entirely of steel, making it extremely resistant, even when deployed outside in tough
weather conditions. This is ideal for water-front environments where ordinary bass speakers would
corrode. It cannot be penetrated by foreign objects like dust, sand or water, which over time can damage
an ordinary audio element.
A variety of dedicated hardware accessories provide architects with numerous mounting options for
permanent and portable installations best suited for theatres and other venues where invisible line
arrays are ideal.
Installing a line array of KU44 subwoofers at the side or behind a line array of Kobras allows to create a
full range sound source with true line-array characteristics down to 50 Hz.
All KU44 components are designed by the K-array R&D department and custom made under the K-array
quality control system.
• Unique performance-to-size ratio
• Ideal for line-array configurations
• 2 x 4” long-excursion woofers
• 2 x 4” passive radiators
• Extended frequency response
• Selectable impedance (8Ω/ 32Ω)
• Weather proof, suitable for outdoor
installations
• To extend the low range of a line array of
mid-high speakers
• Theaters
• Houses of worship, Conference halls
• Portable and installed AV systems
4. pACKAgE CONTENTS
• 1 x Subwoofer
• 1 x 4-pin Phoenix connector
• 1 x serial cable

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Read these instructions - Keep these instructions - Heed all warnings
5. SAFETY INFORMATION
Warning. Failure to follow these safety instructions could result in injury
or damage to the device or other property.
IMPORTANT SAFETY INSTRUCTIONS
• Read these instructions.
• Keep this instructions.
• Heed all warnings.
• Follow all instructions and keep all warnings.
• 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.
• 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.
• 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.
• Do not make repairs yourself. 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.
• 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.
• 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. 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.

4,8in
121mm
4,6in
116mm
19,7in
500mm
4,8in
121,8mm
4,0in
101mm
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6. 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.
7. p h Y S I C A L
Weight
5.9 kg (13.0 lbs)

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7.1 MOUNTINg SCREw hOLES FOR ACCESSORIES
Mounting screw holes for wall brackets
Mounting screw holes for K-JOINT2

8Ω32Ω
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8. wIRINg
The KU44 is comprised of two 4” neodymium transducers, combined with two 4” passive transducers.
The two transducers can be wired in parallel (resulting in a 8Ωtotal impedance) or in serial (resulting
in a 32Ωtotal impedance). To do this, we provide a 4-pin female Phoenix connector where users
can make the wiring; then the female Phoenix connector is plugged into the male Phoenix connector
situated at the back of the speaker.
We provide also a “serial cable” that can be used to connect the two central pins of the phoenix
connector in the 32Ωconfiguration.
NOTE
The K-array KA84 amplifier can drive up to eight KU44 at 32Ω
per channel. The K-array KA24 and KA14 amplifiers can drive up
to two KU44 at 8Ω per channel.

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8.1 K-2SpK ACCESSORY
This accessory is used to connect a Speakon cable to a KU44. It features two Speakon connectors wired
in parallel giving you the possibility to wire two or more KU44s in parallel using only Speakon cables.
The two wires situated at the back of the K-2SPK carry the signal from the 1+ contact (red wire) and
1- contact (black wire) of the Speakon connector. Wire them to the phoenix connector as shown in the
previous section (by default, they are wired in serial configuration). Use the four screws and the four
hexagonal spacers included to mount the K-2SPK on the KU44.
AMPLIFIER
OUTPUT
KU44s wired in parallel via Speakon cables

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9. SET-Up AND CONFIgURATIONS
K-array offers a variety of dedicated accessories to mount and interconnect the speakers for a wide
range of applications.
9.1 SUSpENDINg FROM ThE FLY-BAR
up to 12 KU44 units can be suspended using the K-FLY2 accessory (fly-bar) and the K-JOINT2 accessory
(hardware used to connect together two units or to connect a unit to the fly-bar).
Question: How many K-JOINT2 do I need?
Answer: One per unit. If you want to fly a
cluster composed of 4 x KU44,
you’ll need 4 x K-JOINT2.
FAQ
Please read carefully the K-FLY2 User Guide downloadble from our
website for installation details and important safety instruction:
http://www.k-array.com/en/kfly2.html

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9.2 hANgINg ON ThE wALL
The KU44 can be mounted on the wall with the K-WALL2L or K-WALL2 accessories (not included).
K-WALL2L and K-WALL2 accessories
9.3 RUBBER FEET
KU44 can be positioned on a flat surface in horizontal position thanks to the four rubber feet
included. If necessary, the rubber feet can be easily removed.

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10. 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 housing. 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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11. TEChNICAL SpECIFICATIONS
ACOUSTICS
Power handling 2 x 60 W
Impedance 8 / 32 Ωselectable (2 x 16 Ω)
Frequency range (-10 dB) 50 Hz – 150 Hz (1)
SPL 1W/1mt 84 dB (2)
Maximum SPL 110 dB (cont.) – 116 dB (peak) (3)
COVERAGE
Horizontal omni
Vertical omni
CROSSOVER
Type External crossover required
Frequency Low pass @ 150 Hz
TRANSDUCERS
Type 2 x 4” neodymium magnet woofers with 1” voice coil
Type 2 x 4” passive transducer
POWER AUDIO IN/OUT
Connectors 1 x 4-pin phoenix connector
Wiring Serial or parallel
RECOMMENDED AMPLIFIERS
Type KA14, KA24
CERTIFICATION
IP 54 (Full water protection with K-KUIP4 acessory)
PHYSICAL
Dimensions 11.6 cm x 50.0 cm x 10.1 cm (4.6” x 19.7” x 4.0”)
Weight 5.9 kg (13.0 lbs)
Notes for data
1. With dedicated preset;
2. Measured @4 mt then scaled @1 mt;
3. Measured with musical signal
New materials and design are introduced into existing products without previous notice.
Present systems may differ in some respects from those presented in this catalogue.
The contents of this manual are furnished for informational purposes only. K-array s.u.r.l. assumes no responsibility for any errors or inaccuracies that may
appear in this manual. K-array s.u.r.l. reserves the right to make modifications without prior notice.

K-array s.r.l. a socio unico società soggetta alla attività di direzione e coordinamento di HP Sound Equipment spa
P. IVA / VAT / CF 06206990480 -R.E.A. 609589 Cap. soc. i.v. € 100.000,00
Sede legale: via Paolina Romagnoli 17 50038 Scarperia e San Piero -Firenze -ITALYtel [phone] fax [phone]
[email protected] www.k-array.com
DECLARATION OF CONFORMITY
Manufacturer/Importer: K-array s.u.r.l.
Brand:K-ARRAY
Address: via Paolina Romagnoli 17 50038 Scarperia e S. Piero Firenze ITALY
Date of Issue: 01 /10 /2015
Model Code: KU44, KU44W
Declaration: Complies with safety essential requirements of Council Directive
2004/108/EC on the approximation of the Laws of the Member States relating to
electromagnetic compatibility.
2006/95/EC on the harmonisation of the laws of member state relating equipment
designed for the use within certain voltage limits
This declaration applies to all specimens manufactured in accordance with the attached
manufacturing drawings which form part of this declaration. Assessment of compliance
of the product with the requirements relating to electromagnetic compatibility and low
voltage directive was based on the following standards:
EMC:
EN 55103-1:2009
EN 55103-2:2009
EN 61000-3-2:2006+A1+A2
EN 61000-3-3:2008
Safety:
EN 60065:2002+A1+A11+A2+A12
Marking:
Applying Year: 2015
Applied by: K-array s.u.r.l.
Via Paolina Romagnoli 17
50038Scarperia e S. Piero
Firenze Italy
Tel. [phone]
Fax [phone]
Signed by: Franco Spataro
Technical Manager
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12. CERTIFICATION