Crown Audio 140MPA operation manual Setup, Installation, How to Attach Rack Ears

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Commercial Audio Series Mixer-Amplifiers

2 Setup

2.1 Installation

CAUTION: Before you begin, make sure your mixer-amplifier is disconnected from the power source, with the power switch in the “off” position and all level controls turned completely down (counterclockwise).

Use a standard 19-inch (48.3 cm) equipment rack (EIA RS-310B). See Figure 2.1 for amplifier dimen- sions.

You may also stack mixer-amps without using a cabinet, or you may place a single mixer-amp on a surface with 12 inches of air space around the unit for convection cooling.

NOTE: When transporting in a rack, mixer-amps should be supported at the front and back.

When using an equipment rack, do not mount units directly on top of each other. Allow 2 rack units (3.5 inches) between units for convection cooling. The

side walls of the rack should be a minimum of two inches (5.1 cm) away from the mixer-amplifier sides, and the back of the rack should be a mini- mum of four inches (10.2 cm) from the mixer- amplifier back panel.

2.2 How to Attach Rack Ears

1. Locate the two rack ears and two rack-ear screws supplied.

2. See Figure 2.2. Remove the two screws from each side of the chassis near the front.

3.Place a rack ear flush with the right front of the chassis.

4.Insert a screw that you removed into the bottom

hole of the rack ear and chassis. Screw it in.

Figure 2.2 How to Connect Rack Ears

 

5.Insert a screw that you removed into the center hole of the rack ear and chassis. Screw it in.

6.Insert one of the supplied screws into the top hole of the rack ear and chassis. Screw it in.

7.Repeat steps 3-6 for the left side of the chassis.

Figure 2.1 Dimensions

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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, orSafety Standard Declaration of ConformityCrown International, Inc European Representative’s Name and AddressTable of Contents Features WelcomePower Switch Pushbutton on-off switch Front Panel Controls and IndicatorsPower Indicator Blue LED indicates power on Back Panel Controls, Connectors and Indica- tors AC Power Inlet Detachable IEC Priority SectionInput 4 Section Input 3 SectionSetup InstallationHow to Attach Rack Ears Locate the two rack ears and two rack-ear screws suppliedChoose Input Wire and Connectors Mic/Line Connectors Amp Input ConnectorsChoose Output Wire and Connectors 26-40 ft41-60 ft Music-On-Hold ConnectionsWire Your System Phantom PowerLink In/Out Switch How to link another mixer to the 140MPARemote Volume Control 12 Wiring a 1-VCAP Level Control to the Output VCA ConnectorPowering Up OperationPriority Ducking Music-On-HoldVice Center for servicing TroubleshootingNo input signal Input signal level is very low Specifications KHz with 0.5% THDService Warranty 12/01Worldwide Except USA & Canada Fax Mo/day/yrThis 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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