Datavideo AD-300 Instruction Manual page 11

Pro audio delay box
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Audio Out
CH1/L and CH2/R ports are two XLR balanced audio
output channels delivering a mixed or delayed audio
output to a switcher.
L and R ports are two RCA unbalanced audio output
channels delivering a mixed or delayed audio output to
a display device.
Note: 4dBu (XLR) = -10dBV (RCA)
Audio IN
XLR 2/CH 4 and XLR 1/CH 3 are two XLR balanced audio
input channels and each allows you to connect an audio
device or a condenser or dynamic microphone.
There are two types of switches for configuring AUDIO
IN:
The LINE/MIC+20dB/MIC+40dB switch is used to set the
AUDIO IN to LINE IN, MIC IN with a 20dB preamp or
MIC IN with a 40dB preamp.
When LINE IN is selected, set the 48V switch to OFF in
order to prevent damage to the connected audio device
due to excessive current flow.
The 48V switch is designed specifically for phantom
power control. When MIC IN is selected, set the 48V
switch to ON if a condenser microphone is used and
OFF if a dynamic microphone is used.
NOTE: Always check the microphone manual for the
appropriate input voltage level and read the advice in
the manual regarding phantom power as some MICs
may have internal batteries.
L/CH1 and R/CH2 are two RCA unbalanced audio input
channels allowing you to connect an audio device.
11

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