Crown Audio 280MA, 180MA 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 U between units for convection cooling. The side walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier sides, and the back of the rack should be a minimum of four inches (10.2 cm) from the 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.

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 2.2 How to Connect Rack Ears

 

3.5 In.

8.9 cm

17.3 In.

43.8 cm

12.2 In.

31.0 cm

4.1In.

10.5cm

13.9In.

35.2cm

Figure 2.1 Dimensions

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Operation Manual

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Contents Some models may be exported under the name Amcron 180MA280MA Important 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 WelcomeInput Volume Controls Output Volume ControlsOutput Signal Presence Indicator Clip IndicatorBack Panel Controls and Connectors Reset Switch Auxiliary Power InputAmplifier Outputs Connectors Amp Config SwitchHow to Attach Rack Ears SetupInstallation Choose Input Wire and Connectors Choose Output Wire and ConnectorsOutputs Maintain proper polarity +/- on output con- nectors Wire Your SystemTypical input and output wiring is shown in Figure Phantom Power Link In/Out SwitchesHow to link another mixer to your mixer-amplifier How to set up Music-On-Hold outputRemote Volume Control Powering UpIncluded Accessories Optional AccessoriesBlock Diagram 280MA Block DiagramTroubleshooting No input signal Input signal level is very lowSpecifications Service Warranty 12/01Worldwide Except USA & Canada City State/Prov Postal Code Country Credit card informationType of credit card MasterCard Personal/Consumer Visa

180MA, 280MA specifications

Crown Audio has established itself as a leader in the professional audio industry, and its 280MA and 180MA models epitomize its commitment to high-quality sound reinforcement. These amplifiers are designed for a range of applications, including commercial audio, live sound, and installation, providing unmatched performance and reliability.

The Crown 280MA is a robust two-channel amplifier that delivers an impressive power output of 280 watts per channel at 4 ohms. Its engineering focuses on efficiency and clarity, making it an excellent choice for any scenario where quality audio is essential. One of its standout features is the built-in mixer, which allows users to connect multiple audio sources seamlessly. This mixing capability is especially beneficial in environments such as restaurants, schools, and places of worship, where different audio sources may need to be balanced and controlled easily.

On the other hand, the Crown 180MA offers a more compact design but does not compromise on performance. With a power output of 180 watts per channel at 4 ohms, this model is perfect for smaller venues or setups. Like the 280MA, the 180MA also includes a built-in mixer, ensuring versatile audio management. Both models feature a streamlined user interface, enabling intuitive operation and quick adjustments.

Both amplifiers incorporate advanced technology such as Crown's proprietary DriveCore technology, which enhances power efficiency while reducing distortion. This technology allows the amplifiers to deliver clean, transparent power without the weight typically associated with traditional designs. The lightweight nature of both models makes installation and transport straightforward, adding to their practicality for sound engineers and event organizers.

The overall construction of the 280MA and 180MA is rugged, built to withstand the rigors of professional use. Features such as short-circuit protection, thermal protection, and overload protection ensure long-term reliability, even in demanding environments. Furthermore, the amplifiers offer flexible input options, including line-level and microphone inputs, allowing users to connect various audio sources without hassle.

In conclusion, the Crown 280MA and 180MA amplifiers represent a perfect blend of power, efficiency, and advanced technology. Their built-in mixers, robust protection features, and lightweight designs make them highly versatile for a wide array of applications. Whether used in commercial settings or live sound environments, these amplifiers ensure that the audio experience remains top-notch, reinforcing Crown Audio's reputation as an industry leader.