2
Because directivity in the low frequency range is weak, the output sound from the subwoofer diffracts not
only toward the audience but also to the stage in almost the same sound pressure. By using the Cardioid
mode, bass to the audience is summed up and bass to the stage is canceled. This suppresses the bass volume
on the stage, providing a greater allowance before howling, and provides more powerful bass for the audi-
ence.
Place the two DXS18 units facing in opposite directions. Set the CARDIOID switch of the DXS18 facing
the audience to off, and that of the DXS18 facing the stage to on. Make sure that the other settings (LEVEL,
POLARITY, X-OVER) of the units are set to the same.
You can also construct a system for Cardioid mode by vertically stacking two units. Set the CARDIOID
switch of the DXS18 facing to the stage side to on. Make sure that the other settings (LEVEL, POLARITY,
X-OVER) of the units are set to the same.
Set the CARDIOID switch of only the DXS18 unit facing the stage to on. Set the levels of the two DXS18
units facing the audience to the same. Set the level of the DXS18 unit facing to the stage approximately 6
dB greater than the DXS18 units facing the audience.
About Cardioid mode
The distance between a speaker (
A
) facing to the audience sound source speaker and another speaker (
B
)
facing to the stage is defined as
d
. The sound of
B
is inverted compared to
A
and delayed appropriately,
corresponding to distance
d
.
The sound of each speaker is cancelled on the stage
side and summed together on the audience side. The
directional characteristics of this combination are
represented in the polar pattern illustration at right.
Since the form resembles a heart shape, it is called
Cardioid mode.
Setup of Cardioid Mode
NOTE
• Input the same signal to all the DXS18 units to be used. You can also use the units connected in daisy
chain fashion with setting the OUTPUT jack to [THROUGH].
• To obtain the optimum Cardioid characteristics, locate the cabinet away from walls by more than 1.2 m.
Two-unit, side-by-side placement
Two-unit, vertically stacked placement
CAUTION
• When vertically stacking DXS18 units, make sure they are stable and not in danger of falling
over.
• Align the rubber feet of the upper DXS18 unit to the feet cups of the lower DXS18.
• When using vertically stacked DXS18 units, do not place any objects (such as full-range speak-
ers or another DXS18) on top of them or insert speaker poles.
To AC outlet
From mixer
To right
DXS18
From left
DXS18
To full-range
speaker
*1
*2
Off
On
*1 When a full-range speaker is connected subse-
quently.
*2 When a full-range speaker is connected subse-
quently and the high pass filter in the full-range
speaker is not used, set this to [HPF POST].
To full-range speaker
Stage
From mixer
Audience
To full-range speaker
To AC outlet
From mixer
Stage
Audience
From lower
DXS18
To full-range
speaker
*1
From mixer
To upper
DXS18
Off
On
*1 When a full-range speaker is connected subsequently.
*2 When a full-range speaker is connected subsequently and
the high pass filter in the full-range speaker is not used, set
this to [HPF POST].
*2
Three-unit, side-by-side placement
From mixer
To center
DXS18
Off
Off
From center
DXS18
From mixer
Stage
To AC outlet
Audience
From left
DXS18
To right
DXS18
On
d
d
A
B
Inverted
Delayed
Waveform
from A
Waveform
from B
Sound is
cancelled
Sound is summed
* This is the optimum state,
in which the distance d is a
quarter of the wavelength.
Stage
side
Audience
side
Inverted
Delayed
Audience side
Stage side
Stage
side
Audience
side
Directional characteristics
PRECAUTIONS
PLEASE READ CAREFULLY BEFORE
PROCEEDING
Please keep this manual in a safe place for future
reference.
WARNING
Always follow the basic precautions listed below
to avoid the possibility of serious injury or even
death from electrical shock, short-circuiting,
damages, fire or other hazards. These precautions
include, but are not limited to, the following:
Power supply/power cord
• Do not place the power cord near heat sources such as
heaters or radiators, and do not excessively bend or
otherwise damage the cord, place heavy objects on it, or
place it in a position where anyone could walk on, trip
over, or roll anything over it.
• Only use the voltage specified as correct for the device.
The required voltage is printed on the name plate of the
device.
• Use only the supplied power cord.
If you intend to use the device in an area other than in the
one you purchased, the included power cord may not be
compatible. Please check with your Yamaha dealer.
• Check the electric plug periodically and remove any dirt
or dust which may have accumulated on it.
• When setting up the device, make sure that the AC outlet
you are using is easily accessible. If some trouble or
malfunction occurs, immediately turn off the power switch
and disconnect the plug from the outlet. Even when the
power switch is turned off, as long as the power cord is
not unplugged from the wall AC outlet, the device will not
be disconnected from the power source.
• Remove the electric plug from the outlet when the device
is not to be used for extended periods of time, or during
electrical storms.
• Be sure to connect to an appropriate outlet with a protective
grounding connection. Improper grounding can result in
electrical shock, damage to the device(s), or even fire.
Do not open
• This device contains no user-serviceable parts. Do not
open the device or attempt to disassemble the internal
parts or modify them in any way. If it should appear to be
malfunctioning, discontinue use immediately and have it
inspected by qualified Yamaha service personnel.
Water warning
• Do not expose the device to rain, use it near water or in
damp or wet conditions, or place on it any containers (such
as vases, bottles or glasses) containing liquids which
might spill into any openings. If any liquid such as water
seeps into the device, turn off the power immediately and
unplug the power cord from the AC outlet. Then have the
device inspected by qualified Yamaha service personnel.
• Never insert or remove an electric plug with wet hands.
Hearing loss
• When turning on the AC power in your audio system,
always turn on the device LAST, to avoid hearing loss and
speaker damage. When turning the power off, the device
should be turned off FIRST for the same reason.
Fire warning
• Do not place any burning items or open flames near the
device, since they may cause a fire.
If you notice any abnormality
• If any of the following problems occur, immediately turn
off the power switch and disconnect the electric plug from
the outlet.
- The power cord or plug becomes frayed or damaged.
- Unusual smells or smoke are emitted.
- Some object has been dropped into the device.
- There is a sudden loss of sound during use of the device.
- Cracks or other visible damage appear on the device.
Then have the device inspected or repaired by qualified
Yamaha service personnel.
• If this device should be dropped or damaged,
immediately turn off the power switch, disconnect the
electric plug from the outlet, and have the device
inspected by qualified Yamaha service personnel.
CAUTION
Always follow the basic precautions listed below
to avoid the possibility of physical injury to you or
others, or damage to the device or other property.
These precautions include, but are not limited to,
the following:
Power supply/power cord
• When removing the electric plug from the device or an
outlet, always hold the plug itself and not the cord. Pulling
by the cord can damage it.
Location
• Do not place the device in an unstable position where it
might accidentally fall over and cause injuries.
• When installing the device:
- Make sure the top surface faces up; do not install on its
sides or upside down.
- Do not use the device in a confined, poorly-ventilated
location.
Inadequate ventilation can result in overheating, possibly
causing damage to the device(s), or even fire. Make sure
that there is adequate space around the heat sink of the
amplifier on the back of the device: at least 30 cm above,
30 cm at the sides and 30 cm behind.
• Do not use the speaker’s handles for suspended
installation. Doing so can result in damage or injury.
• Do not hold the bottom of the device when transporting or
moving it. In doing so, you may pinch your hands under
the device, and result in injury.
• Do not press the rear panel of the device against the wall.
Doing so may cause the plug to come in contact with the
wall and detach from the power cord, resulting in short
circuiting, malfunction, or even fire.
• Do not place the device in a location where it may come
into contact with corrosive gases or salt air. Doing so may
result in malfunction.
• Avoid being near the device during a disaster, such as an
earthquake. Since the device may turn over or fall and
cause injury, stay away from the device quickly and move
to a safe place.
• Before moving the device, remove all connected cables.
• When transporting or moving the device, always use three
or more people. Attempting to lift the device by yourself
may damage your back, result in other injury, or cause
damage to the device itself.
• If you use the pole socket on the subwoofer for mounting
of a satellite speaker, use a speaker of 28 kg (61.7 lbs) or
less in weight and 76 cm (29.9") or less in height. Also,
use a speaker pole no longer than 120cm (47.2"). Use of
any other size pole may cause the device to fall, and
result in injury or damage to the internal components.
Connections
• Before connecting the device to other devices, turn off the
power for all devices. Also, before turning the power of all
devices on or off, make sure that all volume levels are set
to the minimum. Failing to do so may result in electric
shock, hearing loss, or equipment damage.
Maintenance
• Remove the power plug from the AC outlet when cleaning
the device.
Handling caution
• Do not insert your fingers or hands in any gaps or
openings on the device (ports).
• Avoid inserting or dropping foreign objects (paper,
plastic, metal, etc.) into any gaps or openings on the
device (ports). If this happens, immediately turn off the
power unplug the power cord from the AC outlet, and
have the device inspected by qualified Yamaha service
personnel.
• Do not rest your weight on the device or place heavy
objects on it, and avoid use excessive force on the
buttons, switches or connectors to prevent injuries.
PA_en_6
Yamaha cannot be held responsible for damage caused
by improper use or modifications to the device.
NOTICE
To avoid the possibility of malfunction/ damage to the product, damage to data, or damage to other property, follow the
notices below.
Handling and maintenance
• Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile phone, or other electric devices. Otherwise,
the device, TV, or radio may generate noise.
• Do not expose the device to excessive dust or vibration, or extreme cold or heat (such as in direct sunlight, near a heater,
or in a car during the day), in order to prevent the possibility of panel disfiguration, unstable operation, or damage to the
internal components.
• Do not place vinyl, plastic or rubber objects on the device, since this might discolor the panel.
• When cleaning the device, use a dry and soft cloth. Do not use paint thinners, solvents, cleaning fluids, or chemical-
impregnated wiping cloths.
• Condensation can occur in the device due to rapid, drastic changes in ambient temperature—when the device is moved
from one location to another, or air conditioning is turned on or off, for example. Using the device while condensation is
present can cause damage. If there is reason to believe that condensation might have occurred, leave the device for sev-
eral hours without turning on the power until the condensation has completely dried out.
• During extreme changes in temperature or humidity, condensation may occur and water may collect on the surface of the
device. If water is left, the wooden parts may absorb the water and be damaged. Make sure to wipe any water off immedi-
ately with a soft cloth.
• Air blowing out of the port is normal.
• Always turn the power off when the device is not in use.
Connectors
• XLR-type connectors are wired as follows (IEC60268 standard): pin 1: ground, pin 2: hot (+), and pin 3: cold (-).
Manual Development Department
© 2015 Yamaha Corporation
Published 08/2015 POZC-A0
Printed in Indonesia
Yamaha Pro Audio global website:
http://www.yamahaproaudio.com/
Yamaha Downloads:
http://download.yamaha.com/
이 기기는 가정용(B급) 전자파적합기기로서 주로 가정에서 사용하는 것을 목적으로
하며, 모든 지역에서 사용할 수 있습니다.
(class b korea)
In Finland: Laite on liitettävä suojamaadoituskoskettimilla varustettuun pistorasiaan.
In Norway: Apparatet må tilkoples jordet stikkontakt.
In Sweden: Apparaten skall anslutas till jordat uttag.
(class I hokuo)
The above warning is located on the rear of the unit.
L’avertissement ci-dessus est situé sur l’arrière de l’unité.
Explanation of Graphical Symbols
Explication des symboles
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
L’éclair avec une flèche à l’intérieur d’un triangle équilatéral est destiné à attirer l’attention de l’utilisateur sur la présence d’une « ten-
sion dangereuse » non isolée à l’intérieur de l’appareil, pouvant être suffisamment élevée pour constituer un risque d’électrocution.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte-
nance (servicing) instructions in the literature accompanying the product.
Le point d’exclamation à l’intérieur d’un triangle équilatéral est destiné à attirer l’attention de l’utilisateur sur la présence d’instruc-
tions importantes sur l’emploi ou la maintenance (réparation) de l’appareil dans la documentation fournie.
IMPORTANT SAFETY INSTRUC-
TIONS
1
Read these instructions.
2
Keep these instructions.
3
Heed all warnings.
4
Follow all instructions.
5
Do not use this apparatus near water.
6
Clean only with dry cloth.
7
Do not block any ventilation openings. Install in accor-
dance with the manufacturer’s instructions.
8
Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9
Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has
two blades and a third grounding prong. The wide blade
or the third prong are provided for your safety. If the pro-
vided plug does not fit into your outlet, consult an electri-
cian for replacement of the obsolete outlet.
10 Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.
11 Only use attachments/accessories specified by the man-
ufacturer.
12 Use only with the cart, stand, tripod,
bracket, or table specified by the manu-
facturer, or sold with the apparatus. When
a cart is used, use caution when moving
the cart/apparatus combination to avoid
injury from tip-over.
13 Unplug this apparatus during lightning storms or when
unused for long periods of time.
14 Refer all servicing to qualified service personnel. Servic-
ing 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.
(UL60065_03)
PRÉCAUTIONS CONCERNANT
LA SÉCURITÉ
1
Lire ces instructions.
2
Conserver ces instructions.
3
Tenir compte de tous les avertissements.
4
Suivre toutes les instructions.
5
Ne pas utiliser ce produit à proximité d’eau.
6
Nettoyer uniquement avec un chiffon propre et sec.
7
Ne pas bloquer les orifices de ventilation. Installer l’appa-
reil conformément aux instructions du fabricant.
8
Ne pas installer l’appareil à proximité d’une source de
chaleur comme un radiateur, une bouche de chaleur, un
poêle ou tout autre appareil (y compris un amplificateur)
produisant de la chaleur.
9
Ne pas modifier le système de sécurité de la fiche polari-
sée ou de la fiche de terre. Une fiche polarisée dispose de
deux broches dont une est plus large que l’autre. Une
fiche de terre dispose de deux broches et d’une troisième
pour le raccordement à la terre. Cette broche plus large
ou cette troisième broche est destinée à assurer la sécu-
rité de l’utilisateur. Si la fiche équipant l’appareil n’est
pas compatible avec les prises de courant disponibles,
faire remplacer les prises par un électricien.
10 Acheminer les cordons d’alimentation de sorte qu’ils ne
soient pas piétinés ni coincés, en faisant tout spéciale-
ment attention aux fiches, prises de courant et au point
de sortie de l’appareil.
11 Utiliser exclusivement les fixations et accessoires spéci-
fiés par le fabricant.
12 Utiliser exclusivement le chariot, le stand,
le trépied, le support ou la table recom-
mandés par le fabricant ou vendus avec
cet appareil. Si l’appareil est posé sur un
chariot, déplacer le chariot avec précau-
tion pour éviter tout risque de chute et de blessure.
13 Débrancher l’appareil en cas d’orage ou lorsqu’il doit res-
ter hors service pendant une période prolongée.
14 Confier toute réparation à un personnel qualifié. Faire
réparer l’appareil s’il a subi tout dommage, par exemple
si la fiche ou le cordon d’alimentation est endommagé, si
du liquide a coulé ou des objets sont tombés à l’intérieur
de l’appareil, si l’appareil a été exposé à la pluie ou à de
l’humidité, si l’appareil ne fonctionne pas normalement
ou est tombé.
(UL60065_03)
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOIS-
TURE.
AVERTISSEMENT
POUR RÉDUIRE LES RISQUES D’INCENDIE OU DE
DÉCHARGE ÉLECTRIQUE, N’EXPOSEZ PAS CET APPA-
REIL À LA PLUIE OU À L’HUMIDITÉ.
1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions
contained in this manual, meets FCC requirements. Modifica-
tions not expressly approved by Yamaha may void your
authority, granted by the FCC, to use the product.
2. IMPORTANT:
When connecting this product to accessories
and/or another product use only high quality shielded cables.
Cable/s supplied with this product MUST be used. Follow all
installation instructions. Failure to follow instructions could
void your FCC authorization to use this product in the USA.
3. NOTE:
This product has been tested and found to comply with
the requirements listed in FCC Regulations, Part 15 for Class
“B” digital devices. Compliance with these requirements pro-
vides a reasonable level of assurance that your use of this
product in a residential environment will not result in harmful
interference with other electronic devices. This equipment gen-
erates/uses radio frequencies and, if not installed and used
according to the instructions found in the users manual, may
cause interference harmful to the operation of other electronic
devices. Compliance with FCC regulations does not guarantee
that interference will not occur in all installations. If this product
is found to be the source of interference, which can be deter-
mined by turning the unit “OFF” and “ON”, please try to elimi-
nate the problem by using one of the following measures:
Relocate either this product or the device that is being
affected by the interference.
Utilize power outlets that are on different branch (circuit
breaker or fuse) circuits or install AC line filter/s.
In the case of radio or TV interference, relocate/reorient the
antenna. If the antenna lead-in is 300 ohm ribbon lead,
change the lead-in to co-axial type cable.
If these corrective measures do not produce satisfactory results,
please contact the local retailer authorized to distribute this type
of product. If you can not locate the appropriate retailer, please
contact Yamaha Corporation of America, Electronic Service
Division, 6600 Orangethorpe Ave, Buena Park, CA90620
The above statements apply ONLY to those products distrib-
uted by Yamaha Corporation of America or its subsidiaries.
* This applies only to products distributed by YAMAHA CORPORATION OF AMERICA.
(class B)
FCC INFORMATION (U.S.A.)
(weee_eu_en_01)
Information for Users on Collection and Disposal of Old Equipment
This symbol on the products, packaging, and/or accompanying documents means that used electrical and electronic
products should not be mixed with general household waste.
For proper treatment, recovery and recycling of old products, please take them to applicable collection points, in
accordance with your national legislation and the Directives 2002/96/EC.
By disposing of these products correctly, you will help to save valuable resources and prevent any potential negative
effects on human health and the environment which could otherwise arise from inappropriate waste handling.
For more information about collection and recycling of old products, please contact your local municipality, your waste
disposal service or the point of sale where you purchased the items.
[For business users in the European Union]
If you wish to discard electrical and electronic equipment, please contact your dealer or supplier for further information.
[Information on Disposal in other Countries outside the European Union]
This symbol is only valid in the European Union. If you wish to discard these items, please contact your local authori-
ties or dealer and ask for the correct method of disposal.
