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Although providing XLR-type connectors, on some mixing consoles the outputs are
carried out as unbalanced connections. If such a console is employed in your set-up
together with a STANDARD PRECISION SERIES power amplifier, pins 1 and 3 have to be
bridged or the pin 3 of the connection cable has to be left unconnected.
Feeding unbalanced signal sources via pin 3 (b, –, cold) and pin 2 (a, +, hot) into the
power amplifier can result in unusual humming noise and HF-interference leading to
damaging the amplifier itself or the connected loudspeaker systems.
POWER AMPLIFIER INPUTS
Parallel to the XLR-type inputs, output connectors are provided,
offering the opportunity to feed additional power amplifiers with the
same signal.
The inputs are electrically balanced with pin-assignment according to
the IEC 268 standard.
Pin-assignment of the XLR-type input connectors:
PIN 1:
SHIELD
PIN 2:
a, +
PIN 3:
b, -
Input sensitivity is factory set to 0 dBu.
INPUT ROUTING
PARALLEL MONAURAL
Setting the selector switch to the PARALLEL/MONO position puts the
channel A and channel B inputs in electrically direct parallel configu-
ration, leaving you still the possibility to control the channels' level
settings separately, using the output controls A and B.
DUAL STEREO
When the selector switch is set to its DUAL/STEREO position both
channels are amplified individually.
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R E A R P A N E L
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