Crown Audio 140MPA operation manual Wire Your System, Phantom Power, Link In/Out Switch

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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

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Contents Some models may be exported under the name Amcron Commercial Audio SeriesUse only with a cart, stand, tripod, bracket, or Important Safety InstructionsEuropean Representative’s Name and Address Safety StandardDeclaration of Conformity Crown International, IncTable of Contents Welcome FeaturesPower Switch Pushbutton on-off switch Front Panel Controls and IndicatorsPower Indicator Blue LED indicates power on Input 3 Section Back Panel Controls, Connectors and Indica- torsAC Power Inlet Detachable IEC Priority Section Input 4 SectionLocate the two rack ears and two rack-ear screws supplied SetupInstallation How to Attach Rack EarsMic/Line Connectors Amp Input Connectors Choose Input Wire and ConnectorsMusic-On-Hold Connections Choose Output Wire and Connectors26-40 ft 41-60 ftHow to link another mixer to the 140MPA Wire Your SystemPhantom Power Link In/Out Switch12 Wiring a 1-VCAP Level Control to the Output VCA Connector Remote Volume ControlMusic-On-Hold Powering UpOperation Priority DuckingVice Center for servicing TroubleshootingNo input signal Input signal level is very low KHz with 0.5% THD SpecificationsService 12/01 WarrantyWorldwide Except USA & Canada Mo/day/yr FaxThis page Intentionally Left Blank ‰ Personal/Consumer ‰ Business/Corporate ModelIndividual or Business Name Phone # Fax # Commercial Audio Series Mixer-Amplifiers Commercial Audio Series Mixer-Amplifiers
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