17
EnglishEnglishEnglish
user manualuser manual
EnglishEnglishEnglish
user manualuser manual
18
CARDIOID CONFIGURATION
The standard subwoofers are omnidirectional, i.e. the sound
pressure emitted is almost uniform in any direction (constant
directivity in the three dimensions).
The polar diagram of a omnidirectional subwoofer is provided
as reference. As you can see, the directivity is constant in all
directions, thus obtaining a circular graph.
The cardioid configuration was adopted with the intention of directing sound pressure
toward the front of the speaker. Moving toward the rear, however, this pressure is
attenuated.
Attenuation can also be defined in different points of the space behind the sub: for
example it can be set exactly at the centre of the rear hemisphere (180°) or in different
points. These configurations have been designed for all those cases in which the sub is
positioned in front of the stage or on its sides, so as to avoid low frequencies resounding
on the stage, thus avoiding microphone feedback, mechanical noises of the load bearing
structures and sound distortions due to low frequencies loading below the stage.
This configuration can be very useful also when you have to place the subwoofers near
compact structures such as walls etc.. In this case, in fact, rear waves that would create
phase deletion by bouncing on the wall do not occur, therefore preserving correct sound
reproduction.
The main configurations are three:
- CARDIOID (heart shaped diagram): rear attenuation range is 180° (in line with the
front).
This configuration is to be used if the speaker is placed in front of the stage in a central
position; in this case the low frequencies are practically eliminated on stage.
- SUPERCARDIOID: rear attenuation range is 135° with respect to the front.
This configuration is used when the speakers are positioned laterally to stages whose
width is between 6 and 14 metres.
180°
- HYPERCARDIOID: rear attenuation range is 120° with respect to the front.
This is the recommended configuration when the speakers are arranged laterally to
stages whose width is over 14 meters.
135°
120°
The subwoofer DVA S2585N is designed with supercardioid configuration with a 135° rear
attenuation.
It is possible to set the three different configurations via the hardware interface RDNET
CONTROL 2 or RDNET CONTROL 8, that allows you to connect the subwoofer to a
computer for operation monitoring by using the dedicated software downloadable from
the db Technologies site.
A dedicated section "CARDIOD PRESET" where you can find the three choices has been
provided.
RDNET CONTROL 2
PC
PALCO
PALCO
SC = Supercadioid
C = Cardioid
HC = Hypercardioid
Monitoring window DVA S2585N
STAGE
12m
STAGE
20m
STAGE
(8 pages)
(10 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals