Rear View; Input A / Input B; Parallel - Electro-Voice Compact Precision CP3000S Owner's Manual

INPUT A / INPUT B

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 parallel, offering permanent electrical connection, without
regard to the setting of the Power-ON switch.
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.
NF-CONNECTION CORDS
Choosing high-quality balanced cables (two conductors for the audio signal plus separate shielding
mesh) with XLR-type connectors is recommended for LF-signal connection. Although connecting unbal-
anced cables to the power amplifi er inputs is possible as well, using balanced cables is always prefer-
able. A great number of today's audio appliances employ balanced outputs. With balanced cabling, 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)

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.
DUAL
If the selector switch is set to DUAL, the audio signals of channels A and B are
independently amplifi ed.
The inputs INPUT A & INPUT B are electronically balanced
offering input sensitivity of
+5.8dBu /1.51V (CP3000S)
+7.0dBu /1.74V (CP4000S)
for direct connection of mixing consoles, signal processors, etc.
The XLR-type connectors OUTPUT A & OUTPUT B are prepared
for „through-connecting" input signals to additional external power
XLR (female)
7
REAR PANEL