Crown Audio 140MPA Setup, Commercial Audio Series Mixer-Amplifiers, Satellite Receiver, page

Commercial Audio Series Mixer-Amplifiers

2 Setup

2.5 Wire Your System

Typical input and output wiring is shown in Figure 2.10.

INPUTS: For Input 1, connect a microphone or balanced line-level signal to the Input 1 balanced input. Set the Mic/Line switch accord- ingly. Connect unbalanced line-level signals to the RCA input con- nectors.

For Inputs 2-4, connect a balanced line-level signal to the balanced input. Connect unbalanced line-level signals to the RCA input con- nectors.

OUTPUTS: Maintain proper polarity (+/–) on amplifier output con- nectors.

Connect the Amplifier Output screw terminals to the loudspeaker loads. Use terminals marked COM and 70V or 100V for constant- voltage loudspeaker loads. Use terminals marked COM and 4 ohms for 4-ohm speakers.

Connect the COM terminal to speaker negative (–) lead; connect one of the other terminals to speaker positive (+) lead.

2.6 Phantom Power

Condenser mics require phantom power to operate. If you are using a condenser microphone on Input 1, turn on the Phantom Power Switch on the back of the 140MPA. The microphone must be able to work on 15V phantom power, which the 140MPA mic input connector provides.

2.7 Link In/Out Switch

This switch (Figure 2.11) affects which signals are heard when another mixer is wired to the 140MPA.

IN: Any signal applied to the AMP INPUT connector will be mixed with the input signal(s).

OUT: Only the signal from the AMP INPUT connector will appear at the amplifier output.

How to link another mixer to the 140MPA:

Connect the extra mixer’s LINE OUT connector to the 140MPA AMP

INPUT connector. Set the Link switch to IN.

How to set up Music-On-Hold output:
Connect 140MPA LINE OUT to the Music-On-Hold input on a tele-
phone system interface/PBX. Set the LINK SWITCH to IN.	Figure 2.11 Link In/Out Switch
How to set up a processing loop:
Connect 140MPA LINE OUT to processor input. Connect processor
output to 140MPA AMP INPUT connector. Set the Link switch to OUT.

Satellite Receiver

Figure 2.10 Input and Output Wiring

Operation Manual page 11