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Crown 140MPA Operation Manual

Commercial audio series
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Commercial Audio Series
140MPA
Operation Manual
Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice: Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the
property of their respective owners.
®
Some models may be exported under the name Amcron.
©2006 by Crown Audio
®
Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8200
139431-2
8/06

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  • Page 1 The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Trademark Notice: Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the property of their respective owners.

  • Page 2: Important Safety Instructions

    Important Safety Instructions Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instruc- tions.

  • Page 3: Declaration Of Conformity

    CF14 9UG United Kingdom Equipment Type: Commercial Audio Mixer-Amplifiers Family Name: Mixer-Amplifiers Model Names: 140MPA EMC Standards: EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions...

  • Page 4: Table Of Contents

    Table of Contents Important Safety Instructions ...2 Declaration of Conformity ...3 1 Welcome ...5 1.1 Features ...5 1.2 Front Panel Controls and Indicators ... 6 1.3 Back Panel Controls and Connectors...7 2 Setup ...8 2.1 Installation...8 2.2 How to Attach Rack Ears ...8 2.3 Choose Input Wire and Connectors ...9 2.4 Choose Output Wire and Connectors ...10 2.5 Wire Your System ...11...

  • Page 5: Welcome

    1 kHz with 0.5% THD. Operation Manual 1 Welcome ® T he Crown 140MPA is a high-value mixer- amplifier for commercial audio. It provides 4- ohm and constant-voltage outputs (25V and 70V). Typical uses are paging, background music, and music-on-hold.

  • Page 6: Front Panel Controls And Indicators

    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.

  • Page 7: Back Panel Controls And Connectors

    Commercial Audio Series Mixer-Amplifiers 1 Welcome 1.3 Back Panel Controls, Connectors and Indica- tors J. Reset Switch: Resets the circuit breaker that protects the power supply. K. Amplifier Output Connector: 4-position terminal strip with COM (Common), 4 ohms, 25V and 70V terminals. Accepts up to 10 AWG terminal forks.

  • Page 8: Setup

    2 Setup side walls of the rack should be a minimum of two 2.1 Installation inches (5.1 cm) away from the mixer-amplifier CAUTION: Before you begin, make sure your sides, and the back of the rack should be a mini- mixer-amplifier is disconnected from the mum of four inches (10.2 cm) from the mixer- power source, with the power switch in the...

  • Page 9: Choose Input Wire And Connectors

    (two-conductor plus shield), 22-24 gauge cables and connectors. Unbalanced line may also be used but may result in noise over long cable runs. The 140MPA has two types of input connectors: Phoenix-type and RCA. • Mic/Line Connectors and Amp Input Connectors: 3-pin Phoenix-type, balanced, one per input channel (Figure 2.3).

  • Page 10: Choose Output Wire And Connectors

    Music-On-Hold Connections If you have an external FM or XM tuner connected to the 140MPA, you can play its music over a phone line while the caller is on hold. Use one of the connectors below to connect the 140MPA to the Music-On-Hold input on your telephone system interface/PBX.

  • Page 11: Wire Your System

    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.

  • Page 12: Remote Volume Control

    2 Setup 2.8 Remote Volume Control You can remote-control the output volume of the 140MPA. To do so, locate the OUTPUT VCA connector on the back panel. Insert a 4-pin Phoenix-type cable connector into the OUTPUT VCA connector. Wire a Crown 1-VCAP level control to the Phoenix-type cable connector ter- minals as shown in Figure 2.12.

  • Page 13: Operation

    3.2 Priority Ducking If you want a microphone to duck (turn down) the background music or other input signals, follow this procedure. On the back of the 140MPA, 1. Connect a push-to-talk mic contact to the Priority Connector (Figure 3.1).

  • Page 14: Troubleshooting

    4 Troubleshooting CONDITION: No power to the mixer-amplifier. POSSIBLE REASON: • The mixer-amplifier’s Power switch is off. • The mixer-amplifier is not plugged into the • The mixer-amplifier’s high-voltage power sup- CONDITION: Distorted sound. POSSIBLE REASON: • Input signal level is too high. Turn down your input volume controls.

  • Page 15: Specification

    AC Line Voltages Available Operating Temperature/Humidity Storage Temperature Construction Cooling Dimensions Net Weight, Shipping Weight Operation Manual 140MPA 3 mV 800 mV 400 mV ± 1 dB ± 1 dB 50 Hz to 20 kHz with < 0.5% THD > 90 dB <...

  • Page 16: Service

    6.2.5 Estimate Approval Approval of estimate must be given within 90 days after being notified by Crown Audio Inc. Units still in the pos- session of Crown after 90 days of the estimate will become the property of Crown Audio Inc.

  • Page 17: Warranty

    Commercial Audio Series Mixer-Amplifiers 7 Warranty SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB- SEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship.
  • Page 18 7 Warranty SUMMARY OF WARRANTY Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB- SEQUENT OWNER of each NEW Crown1 product, for a period of three (3) years from the date of pur- chase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship, and we...

  • Page 19: Product Registration

    Commercial Audio Series Mixer-Amplifiers Online registration is also available at http://crownweb.crownintl.com/webregistration When this form is used to register your product, it may be mailed or faxed. Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information. * First name: ______________________ Middle initial: _____ * Last name: ________________________________ Company: _________________________________________________________________________________ * Mailing address: ____________________________________________________________________________...
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  • Page 21: Crown Factory Service Information Form

    Commercial Audio Series Mixer-Amplifiers Crown Audio Factory Service Information Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 SRA #: __________________(If sending product to Crown factory service.) Individual or Business Name: ___________________________________________________________________________________________________________________________________________________________________________ Phone #: __________________________________________________ _________________________________________________________ Street Address (please, no P.O.
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  • Page 23 Commercial Audio Series Mixer-Amplifiers THIS PAGE INTENTIONALLY LEFT BLANK Operation Manual page 23...

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