QSC Audio CX Series - Manual (Page 9)

8
V. Controls & Displays
CX4 AND CX4T
The channel attenuator controls, labeled in dB of attenuation , are located on the rear panel. They have 11
detents, adjustable from 0 dB (full gain) to × (full attenuation). The LED displays for each channel function
as shown at right.
CX6, CX6T, CX12, AND CX12T
The channel attenuator controls, labeled in dB of attenuation , are located on the rear panel. They have 11
detents, adjustable from 0 dB (full gain) to × (full attenuation). The LED displays for each channel function
as shown at right.
VI. Operation
AC POWER
The amplifier is available for 100, 120, or 220-240 VAC, 50 or 60 Hz operation. Unless it is specially ordered
otherwise, each amplifier is configured for the line voltage in the market it is sold in. For example, those sold
in Japan are 100 VAC; for North and Central America, 120 VAC; for Europe and most of Asia, 220-240 VAC.
The power cord has a plug for connecting to a standard AC source. For 120-volt operation, the plug is a standard
15-ampere grounded NEMA fitting; it meets safety agency requirements for current consumption of less than
12 amperes during “normal” operation, but peak current draw under heavy usage can be higher.
Models built for 220 to 240-volt use have a standard Schuko (continental Europe) connector on the power cable.
OPERATION
CX4 and CX4T
When first powering up, start with the gain controls off until proper operation is verified (upon turning on
the AC switch, the “POWER” LED should come on, and after three seconds, the muting will stop and sound
can be heard). The amp should now be working.
Gain should be kept in the upper half of its range for full performance. “POWER” LED indicators are provided
to monitor the operation of each channel. Each channel has a red “CLIP” indicator that will show any
distortion in the amplifier. The mute circuit should cut the sound off as soon as you turn off the amp, and
mute for three seconds before restoring power to the speakers. This blocks turn-on and turn-off thumps.
LED Display for CX4 and
CX4T:
LED Display for CX6, CX6T,
CX12, and CX12T: