Electrovoice cp1200 Mode D'Emploi
INPUT A / INPUT B
The inputs INPUT A & INPUT B of the CP series are electronically
balanced. The voltage gain of all models is set to 32 dB (constant
gain). This results however in different input sensitivities for the dif-
ferent models (see table), but the level adjustment of active cross-
overs or signal processors in multi-way systems is much easier.
Power amplifi ers with different output power can be changed with-
out consideration, the crossovers have not to be adjusted due to
the constant amplifi cation of the whole unit line. If external voltage
limiters are used, they should be set to the used power class with
gain). This results however in different input sensitivities for the dif-
ferent models (see table), but the level adjustment of active cross-
overs or signal processors in multi-way systems is much easier.
Power amplifi ers with different output power can be changed with-
out consideration, the crossovers have not to be adjusted due to
the constant amplifi cation of the whole unit line. If external voltage
limiters are used, they should be set to the used power class with
consideration of the connected speaker systems. The XLR-type
connectors OUTPUT A & OUTPUT B are prepared for „through-
connecting“ input signals to additional external power amps. The
input signal is directly routed to these output connectors. There
are no repeaters or other electronic components within that signal
connectors OUTPUT A & OUTPUT B are prepared for „through-
connecting“ input signals to additional external power amps. The
input signal is directly routed to these output connectors. There
are no repeaters or other electronic components within that signal
path. Accordingly, input and output connectors of the corresponding channel are interconnected in par-
allel, offering permanent electrical connection, without regard to the setting of the Power-ON switch.
allel, offering permanent electrical connection, without regard to the setting of the Power-ON switch.
NF-CONNECTION CORDS
Choosing high-quality balanced cables (two conductors for the audio signal plus separate shield-
ing mesh) with XLR-type connectors is recommended for LF-signal connection. Although connecting
unbalanced cables to the power amplifi er inputs is possible as well, using balanced cables is always
preferable. A great number of today’s audio appliances employ balanced outputs. With balanced ca-
bling, the shield connects all metal enclosure parts and therefore effi ciently eliminates the introduction
of external interference – mostly noise and hum.
ing mesh) with XLR-type connectors is recommended for LF-signal connection. Although connecting
unbalanced cables to the power amplifi er inputs is possible as well, using balanced cables is always
preferable. A great number of today’s audio appliances employ balanced outputs. With balanced ca-
bling, the shield connects all metal enclosure parts and therefore effi ciently eliminates the introduction
of external interference – mostly noise and hum.
XLR-
type connector pin-assignment
XLR (male)
XLR (female)
PARALLEL
The input connectors of channel A and channel B are electrically connected
in parallel when the selector switch is set to PARALLEL. However, individually
controlling the volume of both channels is still possible via the corresponding level
controls A and B.
in parallel when the selector switch is set to PARALLEL. However, individually
controlling the volume of both channels is still possible via the corresponding level
controls A and B.
DUAL
If the selector switch is set to DUAL, the audio signals of channels A and B are
independently amplifi ed.
independently amplifi ed.
REAR PANEL
Although having XLR-type output connectors, some mixing console models provide unbalanced
output connection only. When using mixers with unbalanced outputs, bridging PIN1 and PIN3
of the power amp’s input connectors or leaving PIN3 of the cable’s plugs unconnected is
necessary. Otherwise, when feeding in unbalanced audio signals via PIN3 (b, -, „cold“) and PIN2
(a, +, „hot“), strange humming and HF-interference may occur, which very likely will damage the
power amplifi er and/or the connected speaker cabinets.
output connection only. When using mixers with unbalanced outputs, bridging PIN1 and PIN3
of the power amp’s input connectors or leaving PIN3 of the cable’s plugs unconnected is
necessary. Otherwise, when feeding in unbalanced audio signals via PIN3 (b, -, „cold“) and PIN2
(a, +, „hot“), strange humming and HF-interference may occur, which very likely will damage the
power amplifi er and/or the connected speaker cabinets.
7
CP1200 +1.15dBu / 0.88V
CP1800 +3.2dBu / 1.12V
CP2200 +4.7dBu / 1.33V
CP1800 +3.2dBu / 1.12V
CP2200 +4.7dBu / 1.33V