Electro-Voice Contractor Precision CPS1 Owner's Manual page 6

REAR PANEL
POWER AMPLIFIER OUTPUTS
The power amplifier's channel A (left) and channel B (right)
outputs are carried out on 4-POLE-BARRIER-STRIP con-
nectors.
Please, mind the correct polarity when connecting loudspe-
aker systems, according to the shown diagram for the DUAL
OUTPUT.
Dangerously high voltages may be present at the binding
posts, which, after establishing loudspeaker cable con-
nections, makes closing the terminal strip's cover lid
absolutely mandatory.
BRIDGED MODE
When the bridged mode switch is engaged you will have to
use the channel A input.
The channel B input is out of function.
The signal gets internally inverted and fed to the channel B
power amp. The two amplifiers A+B are now used in push-
pull operation providing the double output voltage at the
BRIDGED-OUT connector.
The regular output voltages of the power amplifiers A and B
are still present at the individual output connectors CHAN-
NEL A and CHANNEL B but, in respect to the inverted phase,
using these signals is not recommendable.
Bridged mode operation with loads of 2 ohms is not
admissible.
GROUND-LIFT SWITCH
The ground-lift switch is meant to help you in avoiding ground
noise loops. Whenever the power amplifier is installed in a
19" rack system being operated together with other equip-
ment, the recommended setting of the switch is the GROUN-
DED position. In case the power amplifier is used together
with appliances that are connected to different ground poten-
tials, the recommended setting is UNGROUNDED.
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