Lexicon CX manual UNBAL/BAL Switch, Ground Lift Switches, Trigger Input Switch

CX Power Amplifiers

Basic Operation

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5. UNBAL/BAL Switch

Selects between unbalanced (RCA) or balanced (XLR) audio input for each channel. Power the amplifier off or reduce sys- tem volume before changing the setting of the UNBAL/BAL switch. If the amplifier is connected to a digital controller such as the MC-12 or MC-8, output levels should be re-calibrated whenever the setting is changed.

6. GROUND LIFT Switches

When set to ON, isolates the ground connection between that channel’s audio inputs and the chassis. This can be useful for eliminating audible hum or noise caused by multiple grounding paths in the system. When set to OFF, the audio input is grounded to the chassis. This switch should be set to ON whenever there is ground noise present in the system.

7. TRIGGER INPUT

Enables the amplifier to be controlled by the MC-12/MC-8 or other external devices with a 12V DC trigger output. Connect the trigger output of the external device to the TRIGGER INPUT of the amplifier, and set the TRIGGER switch on the amplifier to ON or DELAY. The amplifier will automatically respond when the external device is powered on and off.

8. TRIGGER INPUT Switch

When set to OFF, the amplifier only powers on and off in response to the front panel standby button. When set to ON or DELAY, only the external device connected to the TRIGGER INPUT can be used to power the amplifier on and off. The front panel standby button will not power the unit on and off. (However, the standby LED still functions normally.)

WARNING

Do not defeat or remove the ground prong on the AC power cord. This will result in a safety hazard, and will not reduce audible hum. The GROUND LIFT switches have no affect on the safety ground of the amplifier.

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