Crown Audio 140MPA Front Panel Controls and Indicators, Power Switch Pushbutton on-off switch

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Commercial Audio Series Mixer-Amplifiers

1 Welcome

1.2 Front Panel Controls and Indicators

A. Input Signal Presence Indicator: Green LED, one for each input channel, illuminates when input sig- nal exceeds –40 dBu.

B. Input Volume Controls: Four controls, one per input. Detented potentiometers with knobs.

C.Master Output Volume Control: Detented poten- tiometer with knob.

D. Output Signal Presence Indicator: Green LED illuminates when output signal level exceeds 100 mV (45 dB below full power) from the 4-ohm tap.

E. Clip Indicator: Red LED on output illuminates at threshold of audible distortion.

F. Power Indicator: Blue LED indicates power on.

G., H. Tone Controls: Bass and Treble non-detented recessed potentiometer on each input channel. Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz.

I.Power Switch: Pushbutton on-off switch.

Figure 1.1 Front Panel Controls and Indicators

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Operation Manual

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Contents Commercial Audio Series Some models may be exported under the name AmcronImportant Safety Instructions Use only with a cart, stand, tripod, bracket, orCrown International, Inc Safety StandardDeclaration of Conformity European Representative’s Name and AddressTable of Contents Features WelcomeFront Panel Controls and Indicators Power Indicator Blue LED indicates power onPower Switch Pushbutton on-off switch Input 4 Section Back Panel Controls, Connectors and Indica- torsAC Power Inlet Detachable IEC Priority Section Input 3 SectionHow to Attach Rack Ears SetupInstallation Locate the two rack ears and two rack-ear screws suppliedChoose Input Wire and Connectors Mic/Line Connectors Amp Input Connectors41-60 ft Choose Output Wire and Connectors26-40 ft Music-On-Hold ConnectionsLink In/Out Switch Wire Your SystemPhantom Power How to link another mixer to the 140MPARemote Volume Control 12 Wiring a 1-VCAP Level Control to the Output VCA ConnectorPriority Ducking Powering UpOperation Music-On-HoldTroubleshooting No input signal Input signal level is very lowVice Center for servicing Specifications KHz with 0.5% THDService Warranty 12/01Worldwide Except USA & Canada Fax Mo/day/yrThis page Intentionally Left Blank Model Individual or Business Name Phone # Fax #‰ Personal/Consumer ‰ Business/Corporate Commercial Audio Series Mixer-Amplifiers Commercial Audio Series Mixer-Amplifiers