9
Cardioid Preset
Preliminary
This product should only be used in Residential
environments, Commercial and light industrial
environments, Urban outdoor environments or
Controlled EMC environment and the rural
outdoors environment, in accordance with
s tand a rd E N 5510 3 - 2 ( Ele c t rom a g n eti c
compatibility. Product family standard for audio,
video, audio-visual and entertainment lighting
control apparatus for professional use. Part 2:
Immunity.)
The rain protector provided by DAS is
designed to protect the unit from splashes. It also
permits an adequate ventilation. Do not cover the
unit with other objects and do not obstruct its
ventilation.
For consumption reasons, it is important not to
connect the equipment to the same line as the
lighting systems, thus avoiding interruptions or
sudden drops in lighting intensity.
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 self-
powered 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 mains cable can be detached from the
device by disconnecting the Neutrik PowerCon
connector. Always disconnect the device by
removing the mains connector from the mains
socket before detaching the mains cable at the
Neutrik PowerCon connector.
IMPORTANT: Do not disconnect the unit
when it is playing music.
Ensure that the device is disconnected from
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.
View of (only LX-218CA-NET)
TM
DASnet
Overload indicator
This device has an indicator (LIMIT or CLIP
LEDs) 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.
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. The power supply,
automatically, allows the system to function using
a voltage range: from 80Vrms to 260Vrms.
Overheating
This equipment does not overheat during
normal conditions of use. Should overheating
occur, the unit will protect itself. You should then
find out why and if necessary contact an
authorised dealer for Technical Assistance.
Normally it is enough just to let the unit cool
down after you have corrected the problem so that
the system functions properly again.
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.
Cardioide Preset
This unique feature facilitates the configuration
of two or three units to create a cardioid response
pattern. This is useful in situations where on-stage
bass level projected from the subs needs to be
kept to a minimum.
To set-up a cardioid configuration with two
stacked units, place the bottom unit facing the
audience and the top box facing the stage. Set the
controls for level, polarity and cut-off frequency
identically on both units. Daisy-chain the signal
from one unit to the other (do not activate the
satellite output high-pass filter). Activate the
Cardioid Preset button on the box facing the
stage. This provides the level and phase
adjustments necessary to cancel the rear
projected sound waves “cleaning” the stage of
unwanted bass.
To assemble a cardioid configuration with three
stacked units, the procedure is basically the same.
Place the lower and top boxes facing the
audience, the middle box facing the stage. Daisy-
chain the signal, make sure the level, polarity and
cut-off frequency are the same on all the boxes
and lastly, activate the Cardioid Preset button on
the box facing the stage.
Manual del Usuario / LX series / User’s Manual
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