Product Features
183
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3.2.4.2.2 DNM-485
Install the DNM device to the position in which the DNM can detect the background noise and adjust
the speaker volume automatically, and connect the DNM device with Audio Processor by RS485 or
Ethernet, besides, if the system needs to connect to a series of DNM on same RS485 port, then the user
should plug in the DNM devices one by one before connecting a series DNM to RS485 port. How to
connect is described in the "Configuration" section.
One DNM can only support one Zone(like IDA8 Zone Channel). Generally, place the DNM in front of a
loudspeaker about 1~2 meters. The distance between DNM and Loudspeaker also relies on the power
of the amplifier and loudspeaker. If it is a high-power loudspeaker (sound is louder), then the distance
should be increased, and vice versa.
The examples of installation as follows:
1. One zone connects to one loudspeaker only, generally, then install the DNM in front of the
loudspeaker about 1~2 meters.
2. One zone connects to many loudspeakers, and installed the loudspeakers by circularity and the
distance is not far between the loudspeakers, then the DNM can be set in the center of
loudspeakers (eg: A small conference room, etc.).
3. One zone connects many loudspeakers, and the installation of loudspeakers are irregular but the
distance of all loudspeakers are not far, then install the DNM about 1~2 meters in the front of any
one loudspeaker.
4. In a large area, the broadcast source is same in the area, and the distance of each loudspeaker is
far, maybe the ambient noise is loud in one side, but quiet in the other side. What if the DNM is
installed around loud side? The DNM will adjust the level automatically allowing people to hear
the broadcast clearly, as all of the loudspeakers are connected from same source (same zone
output). Maybe the volume of broadcast is too loud for the quiet side, or on the contrary, if the
DNM is installed around quiet side, the volume of broadcast is too small for the loud side. To avoid
this problem, the user can separate the area to several zones and one DNM for one separated
zone, and all of the DNM are same input source (eg. Department store, etc.).