Master audio JK26 User manual

JK26 / JK10 / JK12 / JK15
JK12W / JK15W / JK18W1 / JK18W2 / JK218W2 / JK218W4
Pol.Ind.Norte-Perpinyà,25
08226 TERRASSA (Barcelona-SPAIN)
Copyright © 2014 [email protected]
All rights reserved www.master-audio.com
Jan 14
User’s manual / Manual usuario

Master Audio
Joker Series (Passive). Version 1.4 Jan14 2
ENGLISH
1. INTRODUCTION
1.1. General
Master Audio would like to thank you for your confidence in our Joker Series. We
suggest you to read the following instructions carefully in order to obtain the best
performance.
1.2. Features and presentation
JK26
- Two-way Full Range Speaker System
- 2x6" neodymium woofers with Kevlar cone and 1.5” voice coil
- 1" neodymium tweeter with Titanium diaphragm
- Accurate designed crossover to achieve the best performance
- 400W musical program
- Sensitivity: 95 dB (1W/1m)
JK10
- Two-way Full Range Speaker System
- 10" woofer with 2.5” voice coil
- 1.4" PETP diaphragm driver
- 50º to 100º (H) x 55º (V) asymmetrical dispersion horn
- Accurate designed crossover to achieve the best performance
- 500W musical program
- Sensitivity: 97 dB (1W/1m)
JK12
- Two-way Full Range Speaker System
- 12" woofer with 3” voice coil
- 1.75" PETP diaphragm neodymium driver
- 50º to 100º (H) x 55º (V) asymmetrical dispersion horn
- Accurate designed crossover to achieve the best performance
- 700W musical program
- Sensitivity: 98 dB (1W/1m)
JK15
- Two-way Full Range Speaker System
- 15" woofer with 3” voice coil
- 1.75" PETP diaphragm neodymium driver
- 50º to 100º (H) x 55º (V) asymmetrical dispersion horn
- Accurate designed crossover to achieve the best performance
- 800W musical program
- Sensitivity: 99 dB (1W/1m)

Master Audio
Joker Series (Passive). Version 1.4 Jan14 3
JK12W
- Low frequency reinforcement unit
- 12" woofer with 3” voice coil
- 800W musical program
- Sensitivity: 96 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26
JK15W
- Low frequency reinforcement unit
- 15" woofer with 4” voice coil
- 1000W musical program
- Sensitivity: 98 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26/JK10
JK18W1
- Low frequency reinforcement unit
- 18" woofer with 4” voice coil
- 1000W musical program
- Sensitivity: 98 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26/JK10/JK12/JK15
JK18W2
- Low frequency reinforcement unit
- 18" woofer with 4” voice coil
- 2000W musical program
- Sensitivity: 99 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26/JK10/JK12/JK15
JK218W2
- Low frequency reinforcement unit
- 2x18" woofers with 4” voice coil
- 2000W musical program
- Sensitivity: 101 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26/JK10/JK12/JK15
JK218W4
- Low frequency reinforcement unit
- 2x18" woofers with 4” voice coil
- 4000W musical program
- Sensitivity: 102 dB (1W/1m)
- Passive-parallel or bi-amplified use with JK26/JK10/JK12/JK15

Master Audio
Joker Series (Passive). Version 1.4 Jan14 4
2. CONNECTIONS
2.1. Connection description
1 1
Fig.1. Joker (passive) connectors
1- SPEAKON: All models use two Speakon terminals and are duly prepared for a
perfect connection in a parallel system. Terminal Pins +1/-1 must be always used,
disregarding the +2/-2 which are not internally connected.
WARNING: It is strongly recommended to use a two-conductor high quality wire, non-
shielded and two-coloured. We recommend using a minimum section of 4mm2for
each conductor. Avoid long wire distances as they induce to important power and
quality losses
2.2. Configurations
2.2.1. Full Range Stereo configuration
Connect each output of the amplifier LEFT/RIGHT to each cabinet using two
independent wires.
Fig.2. Full range stereo configuration

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Joker Series (Passive). Version 1.4 Jan14 5
2.2.2. Full Range Parallel configuration
Connect the amplifier's output to the Speakon’s input of the first cabinet, always
respecting the polarity positive +1, negative -1. Then, make a bridge from the first
cabinet to the second one. This configuration allows us to connect up to four cabinets
to the same amplifier.
Fig.3. Full range parallel configuration
2.2.3. Passive configuration with Subwoofer
There will be times when you will be interested in reinforcing your Joker Systems with
subwoofer units, in passive mode. In this case only one amplifier will be used for the
whole system.
Connect one of the outputs of the amplifier to the subwoofer through a wire. Then,
make a bridge from the slave Speakon connector of the subwoofer to its respective
mid-high top unit, always respecting the correct polarity between both systems. Do
the same with the other channel.
It is also correct, if the installation requires so, to make the connection in the opposite
way, that is, from the amplifier to the satellite and then to the subwoofer.
Fig.4. Passive with subwoofer configuration

Master Audio
Joker Series (Passive). Version 1.4 Jan14 6
2.2.4. Bi-Amplified configuration with Subwoofer
A wire with the maximum available section (4mm2minimum) should link the low
frequencies output channel of the amplifier to one of the subwoofers. Two subwoofers
can be also connected by bridge one to another, as long as the polarity is strictly
respected.
Connect the other output of the amplifier to the Full Range cabinets.
It is also possible to use only one amplifier for the low reinforcement, connecting each
one of the subwoofers to the two outputs of the amplifier and consequently,
connecting the Full Range cabinets to a second amplifier.
Fig.5. Bi-amplified with subwoofer configuration (option 1)
Fig.6. Bi-amplified with subwoofer configuration (option 2)
WARNING!!!!: In order to allow a bridge connection between cabinets, each one of
them has been provided with two Speakon connectors that allow the Input / Output
function indistinctly. Terminal Pins +1/-1 must be always used, disregarding the +2/-2
which are not internally connected.

Master Audio
Joker Series (Passive). Version 1.4 Jan14 7
3. MOUNTING AND PLACEMENT
For a proper installation of the acoustic cabinet systems, it is strongly recommended
to read carefully the following advices.
3.1. Placement
The Full Range cabinets should be located in a high position (between two or three
meters), slightly inclined to the audience. If the loudspeakers are located too low, the
listeners at the end of the room will not hear a good sound quality.
.
Fig.7. Flying placement
It is advisable to locate the subwoofer units on the floor as they can take advantage
of the so-called “floor-effect”, thus increasing the response in the low frequencies.
If possible, place the subwoofers under the same acoustic axis used for the satellites.
If the above option cannot be carried out, then they should be placed in an
intermediate point between the left and right channels.
3.2. Tripod use
The JK26, JK10, JK12 and JK15 models are equipped with a tripod socket for use
with a standard 35mm tripod.
Do not use the tripod on non-flat floors and be careful not to raise the cabinet too high
on the tripod, as it may become unstable.
Fig.8. Full range cabinet with tripod

Master Audio
Joker Series (Passive). Version 1.4 Jan14 8
3.3. Full range cabinet with subwoofer
The JK12W, JK15W, JK18W1 and JK18W2 are equipped with a M20 Plate for a
35mm distance rod. You can use it to place over the subwoofer the models that are
equipped with the tripod socket (JK26, JK10, JK12 and JK15). Be careful not to use
this system on non-flat surfaces as it may become unstable.
Fig.9. Full range cabinet with subwoofer
3.4. Live applications (mobile)
For a mobile application, whether it is an outdoor or indoor installation, the common
location is to place the bass units (one or two per channel) on each side of the stage.
Fig.10. Mobile applications
To obtain a clear and free-distortion reproduction, it is advisable to place the mid-high
units on top of the low units keeping between them an approximate height of two
meters. If such height cannot be achieved nor maintained, it is advisable to use the
classical tripod for each mid-high cabinet and leave the low units on the floor.

Master Audio
Joker Series (Passive). Version 1.4 Jan14 9
WARNING!!! For installations that suffer from acoustic problems and in which it is
necessary to reinforce the response in the low frequencies, it is advisable to group all
the subwoofers together in the same point. By this way, cancellations will be avoided
and a higher acoustic pressure level will be obtained.
3.5. Asymmetrical and rotatable horns
The JK10, JK12 and JK15 models incorporate an asymmetrical dispersion horn which
will optimise coverage either in horizontal or vertical position.
To rotate the horn, unscrewed the frontal grille, and then, unscrewed the four fixing
screws of the horn. Rotate it 90 degrees taking care of the wires. Screw the horn
again and finally place the frontal grille in its right position.
Fig.11. Rotatable horn
Good coverage of audiences often is a conflicting combination of:
*wide coverage for the closest audience (short throw)
*narrow coverage for distant areas (long throw)
The asymmetrical dispersion horn coverage varies from "short throw" to "long throw"
along the vertical axis (keeping a constant vertical directivity). In conclusion,
directivity feature of (50º to 100º(H), 55º(V)) can be seen as if the horn itself had "two"
horizontal directivities (audience coverage), which depend on the distance. For short
distances the horn should be used with its "wide" dispersion (100º). For long
distances the horn should be used with its "narrow" dispersion (50º).
We suggest you to pay attention to the following examples.
3.5.1. Vertical-Positioned Cabinets (Flown and aiming to the audience)
We need wide coverage (100º) for the closest listeners and narrow coverage for the
distant audience.

Master Audio
Joker Series (Passive). Version 1.4 Jan14 10
Fig.12. Vertical position
3.5.2. Horizontal-Positioned Cabinets (Flown and aiming to the audience)
We need wide coverage (100º) for the closest listeners and narrow coverage for the
distant audience.
Fig.13. Horizontal position
WARNING: The horns have the "Nearfield" mark printed on the 100º horizontal
coverage side.
Fig.14. “Near Field” logo

Master Audio
Joker Series (Passive). Version 1.4 Jan14 11
3.6. Rotatable logo
JK26, JK10, JK12 and JK15 model logos can be rotated.
3.7. Flying
Only experienced people should fly speaker cabinets. Extreme care should be taken
to assure the load bearing capabilities of the structures where the cabinets will be
placed.
Hanging hardware (as chains, eyebolts, lock pins...) should be regularly inspected
and replaced if in doubt.
WARNING!!! DO NOT SUSPEND THE CABINETS FROM THE HANDLES!!!!
3.7.1. JK26, JK10, JK12 and JK15 horizontal flying with “U” bracket
The JK26 may be wall mounted by the SP26 “U” bracket accessory.
The JK10 may be wall mounted by the SP10 “U” bracket accessory.
The JK12 may be wall mounted by the SP12 “U” bracket accessory.
The JK15 may be wall mounted by the SP15 “U” bracket accessory.
Several mounting points
Fig.15. “U” bracket
Mounting:
1- Hold the bracket against the mounting surface, so you can mark the locations of
the mounting holes
2- Drill corresponding pilot holes on the wall and attach the bracket with screws
3- Remove the top hat socket from the cabinet and put the M8 round plate
4- Set the cabinet on the bracket and fix it through the two M8 bracket knobs
5- Adjust the cabinet for desired position and angle
For more information refer to “SP-XX” user’s manual.

Master Audio
Joker Series (Passive). Version 1.4 Jan14 12
3.7.2. JK26, JK10, JK12 and JK15 flying with ACR-M8 eyebolts
These models provide several M8 flying points. Their correct use will permit the flying
in horizontal or vertical position.
Fig.16. JK26 rigging points
Fig.17. JK10 rigging points

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Joker Series (Passive). Version 1.4 Jan14 13
Fig.18. JK12 rigging points
Fig.19. JK15 rigging points

Master Audio
Joker Series (Passive). Version 1.4 Jan14 14
JK26 JK10 JK12 JK15
Horizontal flying 2&5 or 3&6 or 9&10 or 11&12 (front rigging points)
1&4 or 7&8 (back tilt points)
Vertical Flying 2&3 or 5&6 or 9&11 or 10&12 (front rigging points)
1 or 4 or 7 or 8 (back tilt points)
We offer as optional accessory the ACR M8 eyebolt.
3.7.3. JK26, JK10, JK12 and JK15 flying with SP35 wall stand
These models may be wall mounted by the SP35 wall stand accessory.
Fig.20. SP35 wall stand
Mounting:
1- Hold the wall stand against the mounting surface, so you can mark the locations of
the mounting holes
2- Drill corresponding pilot holes on the wall and attach the bracket with screws
3- Set the cabinet on the 35mm pole
4- Adjust the cabinet for desired angle
3.7.4. JK26, JK10, JK12 and JK15 vertical flying with “HR” bar
Use HR26 flying bar for JK26
Use HR10 flying bar for JK10
Use HR1215 flying bar for JK12
Use HR1215 flying bar for JK15

Master Audio
Joker Series (Passive). Version 1.4 Jan14 15
Fig.21. “HR” flying bar for Joker cabinets
3.7.5. JK12W, JK15W, JK18W1, JK18W2, JK218W2, JK218W4 flying
These models are not prepared for flying.
3.8. Joker grille
To remove the front grille, first remove the screws on the left side.
Screws
Fig.22. Grille screws

Master Audio
Joker Series (Passive). Version 1.4 Jan14 16
4. TECHNICAL FEATURES
JK26 JK10 JK12 JK15
Impedance 8Ω/16Ω8Ω
Sensitivity (1W/1m) 95 dB 97 dB 98 dB 99 dB
Frequency response
(-10dB) 70Hz-20kHz 52Hz-18kHz 48Hz-19kHz 45Hz-19kHz
Program power 400W 500W 700W 800W
Directivity 90º x 90º 50º to 100º x 55º
Components
LF 2 x 6”
neodymium
woofers
1 x 10”
woofer 1 x 12” woofer 1 x 15” woofer
HF 1 x 1”
neodymium
tweeter,
titanium
diaphragm
1 x 1.4” PETP
diaphragm
driver
1 x 1.75” PETP
diaphragm
driver
Cabinet
Type Bass-reflex
Height 532 mm 539 mm 609 mm 689 mm
Width 250 mm 365 mm 410 mm 460 mm
Depth 260 mm 340 mm 405 mm 450 mm
Weight (net) 8,7 Kg 16,3 Kg 21,7 Kg 26,2 Kg
Connectors 2 x Speakon (In/Link)
Material Birch plywood, Steel front grille with acoustic foam
Finish Hi-resistance weatherproof matt Polyurea paint
JK12W JK15W JK18W1 JK18W2
Impedance 8Ω
Sensitivity (1W/1m) 96 dB 98 dB 98 dB 99 dB
Frequency response
(-10dB) 40Hz-200Hz 38Hz-200Hz 34Hz-190Hz 34Hz-190Hz
Program power 800W 1000W 1000W 2000W
Directivity omnidirectional
Components
LF 1 x 12”
woofer
(3” v.c.)
1 x 15”
woofer
(4” v.c.)
1 x 18”
woofer
(4” v.c.)
Cabinet
Type Band-pass
Height 387 mm 475 mm 552 mm 552 mm
Width 520 mm 630 mm 740 mm 740 mm
Depth 530 mm 630 mm 710 mm 710 mm
Weight (net) 24,2 Kg 35,5 Kg 48,9 Kg 47,8 Kg
Connectors 2 x Speakon (In/Link)
Material Birch plywood, Steel front grille with acoustic foam
Finish Hi-resistance weatherproof matt Polyurea paint

Master Audio
Joker Series (Passive). Version 1.4 Jan14 17
JK218W2 JK218W4
Impedance 4Ω
Sensitivity (1W/1m) 101 dB 102 dB
Frequency response
(-10dB) 28Hz-110Hz 28Hz-110Hz
Program power 2000W 4000W
Directivity omnidirectional
Components
LF 2 x 18”
woofers
(4” v.c.)
2 x 18”
woofers
(4” v.c.)
Cabinet
Type Bass-reflex
Height 572mm
Width 1070mm
Depth 805mm
Weight (net) 77,8 Kg 78,4 Kg
Connectors 2 x Speakon (In/Link)
Material Birch plywood, Steel front grille with acoustic foam
Finish Hi-resistance weatherproof matt Polyurea paint

Master Audio
Joker Series (Passive). Version 1.4 Jan14 18
5. APPENDIX
POWER LOSSES (%) AND DAMPING FACTOR, RELATED TO WIRE LENGTH AND
SECTION
(*) Referred to an amplifier with a Damping Factor of 200:1. Wire sections under 2.50 mm2
are completely inadvisable.
For fixed installations with 4 Ohms load, it is better to have one wire for each speaker
system. It is not advisable to bridge one cabinet to another.
Wire length
(m) Section (mm2) Resistance
(Ohms) Power losses 8Ohms 4Ohms 2Ohms Damping losses(*) 8 Ohms 4 Ohms
0.75 0.042 0.53% 1.05% 2.10% 98 49
1.50 0.025 0.31% 0.63% 1.25% 123 62
2.50 0.013 0.16% 0.33% 0.65% 151 75
1
4.00 0.008 0.10% 0.20% 0.40% 167 83
0.75 0.210 2.63% 5.25% 10.5% 32 16
1.50 0.125 1.56% 3.13% 6.25% 48 24
2.50 0.065 0.81% 1.63% 3.25% 76 38
5
4.00 0.040 0.50% 1.00% 2.00% 100 50
0.75 0.420 5.25% 10.50% 21.00% 17 9
1.75 0.250 3.13% 6.25% 12.50% 28 14
2.50 0.130 1.63% 3.25% 6.50% 47 24
10
4.00 0.080 1.00% 2.00% 4.00% 67 33
0.75 0.840 10.50% 21.00% 42.00% 9 5
1.50 0.500 6.25% 12.50% 25.00% 15 7
2.50 0.260 3.25% 6.50% 13.00% 27 13
20
4.00 0.160 2.00% 4.00% 8.00% 40 20
0.75 2.100 26.25% 52.50% --- 4 2
1.50 1.250 15.63% 31.25% 62.50% 6 3
2.50 0.650 8.13% 16.25% 32.50% 12 6
50
4.00 0.400 5.00% 10.00% 20.00% 18 9

Master Audio
Joker Series (Passive). Version 1.4 Jan14 19
ESPAÑOL
1. INTRODUCCIÓN
1.1. Generalidades
Master Audio le agradece la confianza depositada en nuestros productos de la Serie
Joker. Le sugerimos lea atentamente las indicaciones que a continuación
exponemos, confiando en que le serán de gran utilidad para obtener sus mejores
resultados.
1.2. Características y presentación
JK26
- Sistema de 2 vías Full Range
- Dos altavoces de 6" de neodimio con cono de Kevlar y bobina de 1,5”
- Tweeter exponencial de 1" de neodimio, con diafragma de Titanio
- Filtro divisor pasivo diseñado con precisión para obtener los mejores resultados
- 400W de programa musical
- Sensibilidad de 95 dB (1W/1m)
JK10
- Sistema de 2 vías Full Range
- Altavoz de 10" con bobina de 2,5”
- Motor de agudos con diafragma de PETP de 1,4”
- Difusor de dispersión asimétrica 50º a 100º (H) x 55º (V)
- Filtro divisor pasivo diseñado con precisión para obtener los mejores resultados
- 500W de programa musical
- Sensibilidad de 97 dB (1W/1m)
JK12
- Sistema de 2 vías Full Range
- Altavoz de 12" con bobina de 3”
- Motor de agudos de neodimio con diafragma de PETP de 1,75"
- Difusor de dispersión asimétrica 50º a 100º (H) x 55º (V)
- Filtro divisor pasivo diseñado con precisión para obtener los mejores resultados
- 700W de programa musical
- Sensibilidad de 98 dB (1W/1m)
JK15
- Sistema de 2 vías Full Range
- Altavoz de 15" con bobina de 3”
- Motor de agudos de neodimio con diafragma de PETP de 1,75"
- Difusor de dispersión asimétrica 50º a 100º (H) x 55º (V)
- Filtro divisor pasivo diseñado con precisión para obtener los mejores resultados
- 800W de programa musical
- Sensibilidad de 99 dB (1W/1m)

Master Audio
Joker Series (Passive). Version 1.4 Jan14 20
JK12W
- Refuerzo de bajas frecuencias
- Altavoz de 12" con bobina de 3”
- 800W de programa musical
- Sensibilidad de 96 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26
JK15W
- Refuerzo de bajas frecuencias
- Altavoz de 15" con bobina de 4”
- 1000W de programa musical
- Sensibilidad de 98 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26/JK10
JK18W1
- Refuerzo de bajas frecuencias
- Altavoz de 18" con bobina de 4”
- 1000W de programa musical
- Sensibilidad de 98 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26/JK10/JK12/JK15
JK18W2
- Refuerzo de bajas frecuencias
- Altavoz de 18" con bobina de 4”
- 2000W de programa musical
- Sensibilidad de 99 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26/JK10/JK12/JK15
JK218W2
- Refuerzo de bajas frecuencias
- Dos altavoces de 18" con bobina de 4”
- 2000W de programa musical
- Sensibilidad de 101 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26/JK10/JK12/JK15
JK218W4
- Refuerzo de bajas frecuencias
- Dos altavoces de 18" con bobina de 4”
- 4000W de programa musical
- Sensibilidad de 102 dB (1W/1m)
- Fácil utilización en pasivo-paralelo / bi-amplificado con JK26/JK10/JK12/JK15