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17 Audio Distribution Amplifier - RB-MS4X3
Rear Panel
Fig 17-4: RB-MS4X3 Rear Panel Connections
Input
The XLR 3 pin input socket is transformer balanced and is capable of
accepting a dynamic or phantom powered microphone, or a line level signal
up to +18dBu (without the 30dB pad applied). The input socket has the
following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non Phase
Output 1 (Direct)
The XLR 3 pin plug is a parallel connection of the input. It is therefore
possible to supply phantom power to the splitter input by connecting
output 1 to a phantom powered microphone preamplifier. The output 1
plug has the following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non Phase
Direct
Output
Output 2
Isolated
Output 3
Isolated
External 48V
Phantom
Input
Direct
Output
Output 2
Isolated
Output 3
Isolated
Direct
Output
Output 2
Isolated
Output 3
Isolated
Direct
Output
Output 2
Isolated
Output 3
Isolated
Input
Input
Input
Input
Output 2 (+48V PL Phantom Loopback)
The XLR 3 pin plug is a transformer isolated output. A switchable centre tap
connection makes it possible to supply phantom power to the splitter input
by connecting output 2 to a phantom powered microphone preamplifier,
and setting the front panel toggle switch to the correct position (see front
panel controls). The output 2 plug has the following connections:
Pin 1: Screen (Can be grounded or lifted by front panel toggle switch)
Pin 2: Phase
Pin 3: Non Phase
Output 3
The XLR 3 pin plug is a transformer isolated output and has the following
connections:
Pin 1: Screen (Can be grounded or lifted by front panel toggle switch)
Pin 2: Phase
Pin 3: Non Phase
