16
DISTRIBUTION AMPLIFIER/ZONE MIXER/MIC SPLITTER DA-410.
The MIC mode is not intended as a microphone preamplifier. Instead, it accommodates or
adapts microphone impedances to the unit allowing perfect match between microphones and
long run cabling to external mixers.
This reduced gain, is optimised to use the unit as audio SPLITTER: If the input and output level
control is 0 dB or below, you can connect to the input either dynamic microphones, condenser
microphones or direct injection boxes without the necessity of setting-up the unit for each signal,
getting an autonomous operation.
This switch permits an extra gain of 12 dB for some applications. It is important to remember
that the input impedance becomes lower (2 k
Ω
) and upon connecting to old 600
Ω
systems, an
insert loss of 2.3 dB will take place.
NOTE:
All the inputs of the unit accept phantom power.
OPERATING LEVEL CHART
MODE
INPUT LEVEL
ADJUSTMENT
OUTPUT LEVEL
ADJUSTMENT
MAXIMUM INPUT
LEVEL
TOTAL GAIN
0 dB
+ 9 dBu
+12 dB
0 dB
+6 dB
+ 3 dBu
+18 dB
0 dB
+ 3 dBu
+18 dB
MIC
+6 dB
+6 dB
-3 dBu
+24 dB
0 dB
+ 22 dBu
0 dB
0 dB
+6 dB
+ 16 dBu
+6 dB
0 dB
+ 16 dBu
+6 dB
LINE
+6 dB
+6 dB
+ 10 dBu
+12 dB
6. OPTIONS
In this section will explain the different available options for the distribution amplifier/zone
mixer/mic splitter.
INPUT TRANSFORMER (IT-DA)
In order to improve the common mode rejection ratio and get a galvanic isolation with the
previous part of the audio system, it is available an input transformer.
Each XLR-3-31 input has an insert point for the input transformer; therefore, you could mount
four input transformers in the unit.
The provided transformers fulfil the isolation rule of 1.5 kV.
OUTPUT TRANSFORMER (OT-DA)
In order to get a galvanic isolation with the next part of the audio system, it is available an
output transformer.
Each XLR-3-32 output has an insert point for the output transformer; therefore, you could
mount ten output transformers in the unit.
The provided transformers fulfil the isolation rule of 2 kV.
EQUALISER CARD (TE-67)
In certain installations it is advisable the use of equalisation points in order to improve the
system frequency response. Inserting an equalisation directly in the distribution amplifier/zone
