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Basic Operation
CX Power Amplifiers
2-5
1. Power Switch
Disconnects power to the AC Input Connector. Set this switch
to off when making or breaking connections to the amplifier.
2. AC Input Connector
The AC input connector provides power to the unit with the
supplied power cord (3 conductor, 14AWG). Do not use an
extension cord. For optimal performance, use an isolated
power receptacle with adequate current (at least 15 Amps).
Line voltages ≥10% above the specified voltage may damage
the amplifier. Line voltages ≥10% below the specified voltage
may cause the amplifier to enter a protection mode, indicated
by the red standby LED flashing.
3. INPUT 1 to 7 (CX-7) or 1 to 5 (CX-5)
Provide audio input for the speakers connected to the
corresponding audio outputs. When using the unbalanced
(RCA) audio inputs, make sure the UNBAL/BAL switch
located below each XLR connector is set to UNBAL. When
using the balanced (XLR) audio inputs, make sure the
UNBAL/BAL switch is set to BAL. The illustration below shows
the appropriate cable pin-out for XLR connectors.
2 = Positive
3 = Negative
1 = Ground
Male
Cable End
4. OUTPUT 1 to 7 (CX-7) or 1 to 5 (CX-5)
Provide audio output for the speakers. OUTPUT connectors can
accept bare speaker wires, banana plug connectors, or certain
spade connectors. When using bare speaker wires, loosen the
connector, insert the wire into the top of the receptacle, then
tighten the connector. The same procedure should be used for
spade connectors. Banana plugs should be inserted into the
outward-facing receptacle.
Use heavy gauge speaker cable to ensure low-impedance
connections between the amplifier and the speakers. Observe
correct speaker polarity.
Note:
Speakers must have impedance ratings of 2Ωor
higher. Using speakers with lower than recommend-
ed impedance ratings might activate protection
modes.
Do not connect the OUTPUTs of one channel to the
OUTPUTs of other channels or to other amplifiers.
WARNING