User´s Guide
SX 218
Antes de utilizar el equipo, lea la sección
“Precauciones de seguridad” de este
manual. Conserve este manual para
futuras consultas.
Before operating the device, please read
the “Safety precautions” section of this
manual. Retain this manual for future
reference.
CONTENTS
SAFETY PRECAUTIONS
WARRANTY
DECLARATION OF CONFORMITY
INTRODUCTION
CONFIGURATION
LINE DRAWINGS
SPECIFICATIONS
AMPLIFIER
Description
ON / OFF
Overload indicator
Equalisation
Overheating
Low main voltage
Current consumption
Troubleshooting
ACCESSORIES
APPENDIX
Line connections: Unbalanced and balanced
3
4
5
6
7 a 10
11
11
12 a 14
15
16
Manual del Usuario / SX-218A / User’s Manual
Precauciones de Seguridad
SX-218 Active
Cajas acústicas activas / Self-powered loudspeaker enclosures
Safety Precautions
El signo de exclamación dentro de un triángulo indica la
existencia de importantes instrucciones de operación y
mantenimiento en la documentación que acompaña al producto.
Conserve y lea todas estas instrucciones. Siga las advertencias.
ATENCIÓN: Es un producto clase A, por lo que en entornos
domésticos puede causar radio-interferencias, en cuyo caso el
usuario tendrá que tomar las medidas oportunas.
De acuerdo con EN55103-2, usar el equipo sólo en entornos E1,
E2, E3 ó E4.
No desconecte la tierra en el conector de alimentación pues es
peligroso e ilegal. Equipo de Clase I.
El signo del rayo con la punta de flecha, alerta contra la
presencia de voltajes peligrosos no aislados. Para reducir el
riesgo de choque eléctrico, no retire la cubierta.
Sólo use este equipo con el cable de red de alimentación
adecuado para su país.
No instale el aparato cerca de ninguna fuente de calor como
radiadores, estufas u otros aparatos que produzcan calor. Debe
instalarse siempre sin bloquear la libre circulación de aire por las
No exponga este equipo a la lluvia o humedad. No use este
aparato cerca del agua (piscinas y fuentes, por ejemplo). No
exponga el equipo a salpicaduras ni coloque sobre él objetos
que contengan líquidos, tales como vasos y botellas. Equipo IP-
20.
Este símbolo indica que el presente producto no puede ser
tratado como residuo doméstico normal, sino que debe
entregarse en el correspondiente punto de recogida de equipos
eléctricos y electrónicos.
Equipo diseñado para funcionar entre 15ºC y 42ºC con una
humedad relativa máxima del 95%, con un rango de ±10% de la
tensión nominal de alimentación indicada en la etiqueta trasera
(según IEC 60065:2001). Si debe sustituir el fusible preste
atención al tipo y rango.
The exclamation point inside an equilateral triangle is intend to
alert the users to the presence of important operating and
maintenance (servicing) instructions in the literature
accompanying the product. Heed all warnings. Follow all
instructions. Keep these instructions.
WARNING: This is a class A product. In a domestic environment
this product may cause radio interferences in which case the
user may be required to take adequate measures.
Use this product only in E1, E2, E3 or E4 environments
according to EN55103-2.
Do not remove mains connector ground, it is dangereous and
illegal. Class I device.
The lightning and arrowhead symbol warns about the presence
of uninsulated dangerous voltage. To reduce the risk of electric
shock, do not remove the cover.
Only use this equipment with an appropriate mains cord for your
country.
Do not install near any heat sources such as radiators, heat
registers, stoves or other apparatus that produce heat. The
circulation of air through the heatsink must not be blocked.
Do not expose this device to rain or moisture. Do not use this
apparatus near water (for example, swimming pools and
fountains). Do not place any objects containing liquids, such as
bottles or glasses, on the top of the unit. Do not splash liquids
on the unit. IP-20 equipment.
This symbol on the product indicates that this product should
not be treated as household waste. Instead it shall be handed
over to the appicable collection point for the recycling of
electrical and electronic equipment.
Working temperature ranges from 15ºC to 42ºC with a relative
humidity of 95%, with ±10% of the rated main voltage value
indicated on the rear label (according to IEC 60065:2001). If the
fuse needs to be replaced, please pay attention to correct type
and ratings.
El cableado exterior conectado al equipo requiere de su
instalación por una persona instruida o el uso de cables flexibles
ya preparados.
Si el aparato es conectado permanentemente, la instalación
eléctrica del edificio debe incorporar un interruptor multipolar con
separación de contacto de al menos 3mm en cada polo.
Desconecte este aparato durante tormentas eléctricas,
terremotos o cuando no se vaya a emplear durante largos
periodos.
No emplace altavoces en proximidad a equipos sensibles a
campos magnéticos, tales como monitores de televisión o
material magnético de almacenamiento de datos.
No existen partes ajustables por el usuario en el interior de este
equipo. Cualquier operación de mantenimiento o reparación
debe ser realizada por personal cualificado. Es necesario el
servicio técnico cuando el equipo se haya dañado de alguna
forma, como que haya caído líquido o algún objeto en el interior
del aparato, haya sido expuesto a lluvia o humedad, no funcione
correctamente, haya recibido un golpe o su cable de red esté
dañado.
Limpie con un paño seco. No use limpiadores con disolventes. Clean only with a dry cloth. Do not use any solvent based
The outer wiring connected to the device requires installation by
an instructed person or the use of a flexible cable already
prepared.
If the apparatus is connected permanently, the electrical system
of the building must incorporate a multipolar switch with a
separation of contact of at least 3mm in each pole.
Unplug this apparatus during lightning storms, earthquakes or
when unused for long periods of time.
Do not place loudspeakers in proximity to devices sensitive to
magnetic fields such as television monitors or data storage
magnetic material.
No user serviceable parts inside. 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.
cleaners.
Manual del Usuario / SX-218 / User’s Manual
3
SX-218
Cajas acústicas pasivas / Passive loudspeaker enclosures
Precauciones de Seguridad
Safety Precautions
El signo de exclamación dentro de un triángulo indica la
existencia de importantes instrucciones de operación y
mantenimiento en la documentación que acompaña al producto.
Conserve y lea todas estas instrucciones.
Siga las advertencias.
El doble cuadrado indica equipo de Clase II. The double square indicates Class II device.
Las especificaciones se encuentran en la etiqueta de la parte
posterior del producto.
No exponga este equipo a la lluvia o humedad. No use este
aparato cerca del agua (piscinas y fuentes, por ejemplo). No
exponga el equipo a salpicaduras ni coloque sobre él objetos
que contengan líquidos, tales como vasos y botellas. Equipo IP-
20.
Este símbolo indica que el presente producto no puede ser
tratado como residuo doméstico normal, sino que debe
entregarse en el correspondiente punto de recogida de equipos
eléctricos y electrónicos.
Equipo diseñado para funcionar entre 15ºC y 42ºC con una
humedad relativa máxima del 95%.
El cableado exterior conectado al equipo requiere de su
instalación por una persona instruida o el uso de cables flexibles
ya preparados.
The exclamation point inside an equilateral triangle is intend to
alert the users to the presence of important operating and
maintenance (servicing) instructions in the literature
accompanying the product.
Heed all warnings. Follow all instructions.
Keep these instructions.
The specifications can be found on the rear label of the product.
Do not expose this device to rain or moisture. Do not use this
apparatus near water (for example, swimming pools and
fountains). Do not place any objects containing liquids, such as
bottles or glasses, on the top of the unit. Do not splash liquids
on the unit. IP-20 equipment.
This symbol on the product indicates that this product should
not be treated as household waste. Instead it shall be handed
over to the appicable collection point for the recycling of
electrical and electronic equipment.
Working temperature ranges from 15ºC to 42ºC with a relative
humidity of 95%.
The outer wiring connected to the device requires installation by
an instructed person or the use of a flexible cable already
prepared.
El equipo cuenta con dos conectores de entrada en paralelo
para facilitar la conexión de varias cajas en paralelo.
No emplace altavoces en proximidad a equipos sensibles a
campos magnéticos, tales como monitores de televisión o
material magnético de almacenamiento de datos.
El colgado del equipo sólo debe realizarse utilizando los herrajes
de colgado recomendados y por personal cualificado. No
cuelgue la caja de las asas.
No existen partes ajustables por el usuario en el interior de este
equipo. Cualquier operación de mantenimiento o reparación
debe ser realizada por personal cualificado. Es necesario el
servicio técnico cuando el equipo se haya dañado de alguna
forma, como que haya caído líquido o algún objeto en el interior
del aparato, haya sido expuesto a lluvia o humedad, no funcione
correctamente, haya recibido un golpe o su cable de red esté
dañado.
Limpie con un paño seco. No use limpiadores con disolventes. Clean only with a dry cloth. Do not use any solvent based
Note that the two Speakon input connectors are wired in parallel
to provide easy parallel connection of several enclosures.
Do not place loudspeakers in proximity to devices sensitive to
magnetic fields such as television monitors or data storage
magnetic material.
The appliance should be flown only from the rigging points and
by qualified personnel. Do not suspend the box from the
handles.
No user serviceable parts inside. 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.
cleaners.
4
Manual del Usuario / SX-218 / User’s Manual
GARANTÍA
Todos nuestros productos están garantizados por un periodo de 24
meses desde la fecha de compra.
Las garantías sólo serán válidas si son por un defecto de
fabricación y en ningún caso por un uso incorrecto del producto.
Las reparaciones en garantía pueden ser realizadas,
exclusivamente, por el fabricante o el servicio de asistencia técnica
autorizado.
Otros cargos como portes y seguros, son a cargo del comprador
en todos los casos.
Para solicitar reparación en garantía es imprescindible que el
producto no haya sido previamente manipulado e incluir una
fotocopia de la factura de compra.
WARRANTY
All D.A.S. products are warrantied against any manufacturing defect
for a period of 2 years from date of purchase.
The warranty excludes damage from incorrect use of the product.
All warranty repairs must be exclusively undertaken by the factory
or any of its authorised service centers.
To claim a warranty repair, do not open or intend to repair the
product.
Return the damaged unit, at shippers risk and freight prepaid, to
the nearest service center with a copy of the purchase invoice.
Manual del Usuario / SX-218A / User’s Manual
5
DECLARACIÓN DE CONFORMIDAD
DECLARATION OF CONFORMITY
D.A.S. Audio, S.A.
C/ Islas Baleares, 24 - 46988 - Pol. Fuente del Jarro - Valencia. España
(Spain).
Declara que la serie SX-218:
Declares that SX-218 series:
Cumple con los objetivos esenciales de las Directivas:
Abide by essential objectives relating Directives:
lDirectiva de Baja Tensión (Low Voltage Directive) 2006/95/CE
lDirectiva de Compatibilidad Electromagnética (EMC) 2004/108/CE
lDirectiva RoHS 2011/65/CE
lDirectiva RAEE (WEEE) 2002/96/CE
Y es conforme a las siguientes Normas Armonizadas Europeas:
In accordance with Harmonized European Norms:
lEN 60065:2002 / A11:2008
Audio, video and similar electronic apparatus. Safety requirements.
lEN 55103-1:2009
Electromagnetic compatibility. Product family standard for audio, video,
audio-visual and entertainment lighting control apparatus for
professional use. Part 1:Emission.
lEN 55103-2:2009
Electromagnetic compatibility. Product family standard for audio, video,
audio-visual and entertainment lighting control apparatus for
professional use. Part 2:Immunity.
6
Manual del Usuario / SX-218 / User’s Manual
INTRODUCTION
When low reforcement is required the D.A.S. subwoofer systems offer the right solution.
Ideal for fixed installations like pubs, disco and bars, and mobile applications.
SETTINGS
SX-218
- High performance subwoofer system
- Two 18SXN loudspeakers
- Front-loaded, bass-reflex configuration
- 18 mm plywood
- Finished with ISO-Flex durable black paint
The SX-218 is a high-power subwoofer system
designed to provide outstanding performance in terms of
output power, bandwidth extension and distortion. The
SX-218 incorporates two 18SXN cone transducers. The
newly developed 18SXN loudspeakers are a significant
improvement over their predecessors offering increased
power handling, reduced distortion and power
compression.
The SX-218 enclosure is constructed of 18 mm birch
plywood finished with the durable ISO-Fles black paint.
The rugged cabinet design employs extensive internal
bracing eliminating sound coloration due to panel
resonance. The loudspeakers are protected by a
perforated steel grille sealed against corrosion using a
powder coat finish. The SX-218 is designed for use in
biamped systems with external amplification. A pole
mount socket located on the top panel provides flexibility
when using full-range satellite systems.
SX-218A
- Powered subwoofer system
- 1800 W 3rd generation Class D amplifier
- Two 18SXN high performance loudspeakers
- Front loaded bass-reflex configuration
- Pole mount accessories
The SX-218A is a powered subwoofer system
designed to provide outstanding performance in terms
of output power, bandwith extension and distortion. The
SX-218A incorporates two 18SXN cone transducers.
The newly developed 18SXN loudspeakers are a
significant improvement over their predecessors offering
increased power handling, reduced distortion and power
compression.
The SX-218A which incorporates a new amplifier
(1800 W) design providing ample headroom and
accuracy. The amplifier uses a 3rd generation Class D
design and convection cooling from its sealed
enclosure. Thanks to the amplifiers high efficiency, no
forced ventilation is needed eliminating possible fan
failures. The automatic dual voltage selector ensures a
“no hassle” mains setup anywhere in the world.
The SX-218A enclosure is constructes of 18 mm
birch plywood finished with the durable ISO-Flex black
paint. The loudspeakers are protected by a perforated
steel grille sealed against corrosion using a powder coat
finish. A pole mount socket located on the top panel
provides flexibility when using full-ranges satellite
systems.
Manual del Usuario / SX-218 / User’s Manual
7
CONFIGURATIONS
6 x Convert12A
4 x SX-218A
1 x DSP-2060/2040
LINKLINK
POWER
SUPPLY
LINK LINK
LINK LINK
DSP-2060 / 2040
OUT 1
LINK
LINK LINK
OUT 2
POWER
SUPPLY
OUT 5
OUT 4
LINK
LINKLINK
POWER
SUPPLY
POWER
SUPPLY
Convert 12 Accessories
Rigging frames
AX-Convert12 x 2
Speaker cabling:
4 x PowerCon link 0.5 m
4 x Signal link 0.5 m
2 x Signal link 1 m
1 x DSP-2060A / DSP-2040A
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Manual del Usuario / SX-218 / User’s Manual
POWER
SUPPLY
CONFIGURATIONS (cont´d)
2 x Convert12A
2 x SX-218A
1 Unit preset 1 Unit preset
LINK
LINK
POWER
SUPPLY
Satellite X-Over HPF Satellite X-Over HPF
Convert 12 Accessories
Rigging frames
TRD-6 x 2
Speaker cabling:
2 x Signal link 2 m
1 x DSP-2060A / DSP-2040A
Manual del Usuario / SX-218 / User’s Manual
9
CONFIGURATIONS (cont´d)
Convert 1560A
60º
40º
SX-218A
2 x Convert 1560A
2 x SX-218A
L2
L1
L3
I
o
FI4030mA4pol.
FI-Schalter
6x MCB 16A “C” 1pol.
1x RCD 40A 30mA 4pol.
IN IN IN
IN IN IN
1 2 3
1 2 3
OUT OUT OUTOUT OUT OUT
OUT OUT OUTOUT OUT OUT
OUT OUT OUT
IN IN IN
DASnet DASnet DASnet
OUT OUT OUT
IN IN IN
IN IN IN
IN IN IN
Audio Audio Audio
Audio Audio Audio
DASnet DASnet DASnet
DSP-2060
40º
TM
10
SX-218A
Convert 1560A
DCD preset 40º horizontal coverage
POWER
SUPPLY
60º
Manual del Usuario / SX-218 / User’s Manual
Vertical Coverage 60º
CONFIGURATIONS (cont´d)
60º
POWER
SUPPLY
POWER
SUPPLY
POWER
SUPPLY
60º
POWER
SUPPLY
L2
L1
L3
I
o
FI4030mA4pol.
FI-Schalter
6x MCB 16A “C” 1pol.
1x RCD 40A 30mA 4pol.
IN IN IN
6 x SX- 218A
6 x Convert 1560A
IN IN IN
1 2 3
1 2 3
OUT OUT OUTOUT OUT OUT
OUT OUT OUTOUT OUT OUT
OUT OUT OUT
IN IN IN
DASnet DASnet DASnet
OUT OUT OUT
IN IN IN
IN IN IN
IN IN IN
Audio Audio Audio
Audio Audio Audio
DASnet DASnet DASnet
DSP-2060
60º
POWER
SUPPLY
POWER
SUPPLY
3 x SX-218A 3 x SX-218A
3 x Convert 1560A 3 x Convert 1560A
60º
POWER
SUPPLY
Manual del Usuario / SX-218 / User’s Manual
Vertical Coverage 60º
Horizontal Coverage 60º
11
LINE DRAWINGS
ALL DIMENSIONS IN MILIMETERS
690
10121012
580580
SX-218ASX-218
Top View
Top View
SPECIFICATIONS
Nominal Power Amplifier
Frequency Range (-10 dB)
Maximum Peak SPL at 1m
Transducers/ Replacement Parts
AC Power Requeriments
Dimensions (H x W x D)
Input Type
Input Impedance
Sensitivity
Enclosure Material
Color/Finish
Connectors
Accessories
Front View
690
Front View
Right View
Right View
Model ModelSX-218A SX-218
3600 Wpeak - 1800 Wcontinuous
Balanced Differential Line
Line: 20 kohms
Line: 1.95V (+8dBu)
35 Hz - 160 Hz (variable LPF)
140dB
LF: 2 x 18SXN/GM 18SX
Birch Plywood
Black Paint
INPUT: 2 x Female XLR
LOOP THRU: 2 x Male XLR
AC INPUT: PowerCON
AC OUTPUT: PowerCON
115V, 6A, 50 Hz / 60 Hz
230 V, 3A, 50 Hz / 60 Hz
RMS Power Handling
Peak Power Handling
Frequency Range (-10 dB)
Nominal Impedance
On-axis Sensitivity 1W/1m
Rated Peak SPL at 1m
Enclosure Material
Color/Finish
Connectors
Dimensions (H x W x D)
Accessories
Weight
2000 W
8000 W
35 Hz - 160 Hz
4 Ohms
101 dB SPL
140 dB
Birch Plywood
Black/ISO-Flex Paint
2 x Nl4 SpeakON
101.2 x 69 x 58 cm
39.8 x 27.2 x 22.8 in
68.5 kg (151 lb)
AXS-convert12
TRD-6
101.2 x 69 x 58 cm
39.8 x 27.2 x 22.8 in
71.5 kg (157 lb)
Weight
AXS-convert12
TRD-6
Rear View
Rear View
D.A.S. Audio S.A. continuously strives to enhance its products through investigation and development. All
specifications are subject to change without prior warning.
12
Manual del Usuario / SX-218 / User’s Manual
AMPLIFIER
Description
1) INPUT :
1/4” Jack+XLR c
connector. This is a balanced connector just like the
LOOP THRU connector with the following pin
assignments
:
1 or S =GND (ground).
2 or T =(+) Non inverted input.
3 or R =(-) Inverted input.
2) SATELLITE OUTPUT :
A and B, XLR-type output signal connectors for
connecting several units together and sending them all
the same input signal or filtered signal (by using
THRU/HPF).
3) LIMIT :
Red LED indicates amplifier saturation. Amplifier
limiter indicator lights.
ombined socket-type input signal
SX-218A
3
5
6
9
LIMIT
SIGNAL
ON
LEVEL
OUTPUT A OUTPUT B
D.A.S. AUDIO S.A. (
CARDIOID OMNI
4
0
+6-oo
POLARITY
- +
MADE IN SPAIN
F
R
LOW-PASS
125Hz
100Hz
Valencia)
F
F
160Hz
CARDIOID
PRESET
R F
10
7
4) SIGNAL :
Green LED indicates signal presence.
5) ON :
11
AC OUTPUT
MAX. 2 UNITS IN PARALLEL
INPUT A
SATELLITE X-OVER
HPF/THRU
INPUT B
Green LED indicates that the unit is ON.
6) LEVEL :
Potentiometer for adjusting the unit level.
7) LOW-PASS CROSSOVER :
8
10
6A 50Hz/60Hz
AC INPUT
115V
N1918
1
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE
Button for LPF adjustment for subwoofer. We
recommend 100 Hz.
SX-218A Amplifier
8) AC INPUT :
PowerCon NAC3FCA mains connector (inserted, rotated and locked for ON). Only use this equipment
with an appropriate mains cord.
9) POLARITY :
Switch for inverting the phase of the unit.
10) CARDIOID PRESET :
Button for switching between two types cardioid response.
11) AC OUTPUT :
PowerCon NAC3FCB connector for AC loop thru allows up to 6 units when using a 230V version (see
unit’s label)). Only use this equipment with an appropriate mains cord.
2
Manual del Usuario /SX-218 / User’s Manual
13
ON / OFF
A sound system should be switched on
sequentially. Switch on the self-powered units last
in your sound system (switch on the subwoofer
before the mid-high system). Switch on the sound
sources such as CD players or turntables, then the
mixer, then the processors, and finally the selfpowered unit. If you have several units, it is
recommended that you switch them on
sequentially one at a time.
Follow the inverse order when switching off,
turning self-powered units off before any other
element in the sound system.
Disconnect the device by removing the mains
connector from the mains socket. The mains
connector and mains socket must always be freely
accessible and never covered or blocked in any
way.
The models use a power cable equipped with
a Neutrik PowerCon NC3FCA connector. Power
can be daisy chained via the NC3FCB output
connector (see details on product label).
IMPORTANT: Do not disconnect the unit
while in use.
Ensure that the device is disconnected from
the mains by observing that the ON LED is turned
off. Please note that the ON LED can stay on for
several seconds after the mains power has been
disconnected.
Overload indicator
This device has an indicator (LIMIT LED) that
lights when the signal is excessive.
The indicator should not be lit continuously.
This distorts the signal (quickly fatiguing your ears)
and may damage the speakers. Therefore, it is
recommended that you never work with this LED
on; at most it should blink only occasionally.
Equalisation
The unit does not need extreme settings of
equalisation to produce quality sound. Avoid high
levels of gain on the equalisers. Gain values above
+3 dB on a console’s EQ are not recommended.
Normally it is enough just to let the unit cool
down after you have corrected the problem so that
the system functions properly again.
Keep grilles clean and dust-free.
Air circulates from the bottom to the top of the
amplifier.
Radiador
Low mains voltage
If mains voltage falls below the shutdown
voltage for the unit, it will stop playing. When
acceptable levels are regained, the unit will switch
back on automatically.
Therefore the current consumed by a 115V
version is double the 230V version to achieve the
same acoustic power level.
Pink Noise
Mains 230 Vrms
SX-218A
1/3 Potencia
2A
Overheating
This equipment does not normally overheat
during normal conditions of use. When overheating
occurs, the unit protects itself. You should then
find out why and if necessary contact an
authorised dealer for technical assistance.
14
Manual del Usuario / SX-218 / User’s Manual
Troubleshooting
PROBLEM
CAUSE
SOLUTION
No sound from the unit. The
SIGNAL LED does not light up.
Full power cannot be obtained. The
LIMIT LED never lights up.
Sound is distorted. The LIMIT LED is
not on, or only lights up occasionally.
Sound is distorted and very loud
and LIMIT LED lights up.
Hum or buzz when a mixer is
connected to the unit.
Hum or buzz when using lighting
controls in the same building.
The ON LED does not light up when
the mains connector is connected
and the unit is switched to ON.
1 – The signal source is sending no
signal.
2 – Defective cable.
3 - The amplifier has overheated.
The signal source does not have a
hot enough output.
The mixer or signal source is
distorting.
The system is overloaded and has
reached maximum power.
1.– The console probably has unbalanced outputs. You may be using
an incorrect un-balanced to
balanced cable.
2.– The mixer and the powered
speaker are not plugged into the
same mains outlet.
3.– The audio signal cable is too
long or too close to an AC cable
1.– The audio signal cable is too
long or too close to the lighting
cable.
2.– On a sound system with threephase AC, the lighting equipment
and the UNIT are connected to the
same phase.
1.– Bad or loose AC connection to
the UNIT or the mains outlet.
2 – Faulty AC cable.
3 – The mains voltage is out of
range.
1 – Check that the mixer or sound
source is sending signal to the UNIT.
2 – Check that the cable from the
sound source to the UNIT is
connected correctly. Replace the
cable if defective.
3 - Allow the unit to cool down for
some minutes and it will function
again. Check the main output level
of the mixer or channel gains since
the unit will have been functioning
with excessive levels.
If using a mixer, use the balanced
output if available. Use a
professional mixer with a hotter
output.
Turn mixer channel gains down.
Check that none of your signal
sources are distorting.
Turn down the mixer's output.
1.– Read the appendix of this
manual to make a correct unbalanced to balanced cable.
2.– Connect the mixer and the unit
to the same mains outlet.
3.– Use a cable that is as short as
possible and/or move the audio
signal cable away from mains
cables.
1.– Move the audio signal cable
away from lighting cables. Try to find
out at what point the noise is leaking
into the system.
2.– Connect the sound system to a
different phase than the lights. You
may need the help of an electrician.
1.– Check your connections.
2.– Check the cables, connectors
and AC power with a suitable mains
tester.
3.- If the multimeter determines that
the mains voltage is out the range,
you may need the assistance of an
electrician to find an appropriate
solution.
Manual del Usuario / SX-218 / User’s Manual
15
APPENDIX: Line connections: unbalanced and balanced
There are two basic ways to transport an audio signal with microphone or line level:
Unbalanced line: Utilising a two conductor cable, it transports the signal as the voltage between them.
Electromagnetic interference can get added to the signal as undesired noise. Connectors that carry
unbalanced signals have two pins, such as RCA (Phono) and ¼” (6.35mm, often referred to as jack) mono. 3
pin connector such as XLR (Cannon) may also carry unbalanced signals if one of the pins is unused.
Balanced line: Utilising a three conductor cable, one of them acts as a shield against electromagnetic
noise and is the ground conductor. The other two have the same voltage with respect to the ground
conductor but with opposite signs. The noise that cannot be rejected by the shield affects both signal
conductors in the same way. At the device’s input the two signals get summed with opposite sign, so that
noise is cancelled out while the programme signal doubles in level. Most professional audio devices use
balanced inputs and outputs. Connectors that can carry balanced signal have three pins, such as XLR
(Cannon) and ¼” (6.35mm) stereo.
The graphs that follow show the recommended connection with different types of connectors to balanced
processor or amplifier inputs. The connectors on the left-hand side come from a signal source, and the ones
on the right hand side go to the inputs of the processor or amplifier. Note that on the unbalanced connectors
on the left-hand side, two terminals are joined inside the connector. If hum occurs with balanced to balanced
connections, try disconnecting the sleeve (ground) on the input connector. Note that the illustrations show
what should be connected to what, but that pin locations on an actual XLR connector are different. Also, pin
2 hot is assumed on XLR connectors.
16
Manual del Usuario / SX-218 / User’s Manual
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UM_SX218_01_EN
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