Electro-Voice Precision CP 1200, Owner'S Manual

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8 9
REAR PANEL
Power amp output connection for the two channels A
(left) and B (right) is provided via SPEAKON-type output
connectors.
A plastic cover to prevent inadvertent erroneous
connection protects the BRIDGED OUT connector. Make
sure to remove the cover only when actually operating
the power amplifier in Bridged-Mode.
POWER AMP OUTPUT CONNECTORS
BRIDGED MODE
With the BRIDGED-MODE switch being engaged, using the channel A input
for audio signal feed is mandatory, since input B provides no function. While
the amplifier of channel A operates as usual, the audio signal is internally
inverted and routed to the amplifier of channel B. Both amps – A and B – now
work in push-pull operation to provide doubled output voltage at the
BRIDGED-OUT connector.
The regular output voltage of each amplifier channel A / B is still present at the
corresponding output connector CHANNEL A or CHANNEL B. However, us-
ing these signals is not recommendable because of the aforementioned phase
inversion. Operating the power amp in Bridged Mode with loads of 2ohms con-
nected is not allowable.
CAUTION: Extremely high voltages might be present at the BRIDGED OUT connector during
Bridged-Mode operation. The connected loudspeaker systems have to be capable of handling
such high voltages. Please make sure that power handling specifications as stated in the docu-
mentation supplied with your speaker systems match the specifications of the power amplifier.
GROUND-LIFT SWITCH
The ground-lift switch allows eliminating noise loops. If the power amplifier is
operated together with other equipment in a 19“ rack-shelf, setting the switch
to its GROUNDED position is recommended. If the power amplifier is operated
together with appliances with differing ground potentials, set the switch to its
UNGROUNDED position.
MAINS INPUT
Under normal circumstances, the mains fuse only blows in case of fault.
Replacing the fuse is only permissible when using a new fuse of the same
type with identical amperage, voltage and blow characteristics. If the mains
fuse blows more often, please contact an authorized service centre.
The high-performance mains cord supplied with your power amplifier complies
to applicable safety regulations, plus that its diameter corresponds to the pow-
er amp’s power output capacity. Make sure to use the supplied mains cord for connecting the power amp
to the mains, if possible. Using mains cords with smaller diameters results in higher leakage and conse-
quently reduced maximum power output capacity.
At 100V and 120V units the mains fuse is installed internally. This is fore safety reasons. In case of a
blown mains fuse please contact a qualified service personnel for servicing.