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Crown M Series User Manual

Crown M Series
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Operation Manual
M120
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 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: 574-294-8000
M Series
126781-5A
3/06
M240
1
1
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Crown M Series Specifications

General IconGeneral
Power OutputVaries by model
Frequency Response20Hz - 20kHz
Total Harmonic Distortion<0.05%
WeightVaries by model
Channels2
4 Ohm Stereo (per channel)Varies by model (e.g., M240: 240W, M400: 400W)
Input Impedance20 kOhms balanced, 10 kOhms unbalanced
ProtectionShort circuit, thermal, and DC protection

Summary

Important Safety Instructions

Safety Warnings and Precautions

General safety warnings and important precautions for operating the amplifier.

Magnetic Field Advisory

Information regarding the amplifier's magnetic field and potential interference with sensitive equipment.

FCC Compliance Notice

Statement regarding the device's compliance with FCC rules and regulations.

Declaration of Conformity

EMC and Safety Standards

Lists the Electromagnetic Compatibility and Safety standards the product adheres to.

Welcome

Product Features

Highlights the key features and capabilities of the M Series amplifiers.

How to Use This Manual

Provides guidance on how to effectively use the operation manual.

Setup

Unpack and Install Amplifier

Instructions for unpacking and physically installing the amplifier.

Ensure Proper Cooling

Guidelines for maintaining adequate airflow and cooling for optimal performance.

Input and Output Wiring

Guidance on selecting and connecting input and output wires and connectors.

Stereo Mode Wiring

Specific instructions for wiring the amplifier in stereo mode.

Bridge-Mono Mode Wiring

Specific instructions for wiring the amplifier in bridge-mono mode.

Connect to AC Mains

Instructions for connecting the amplifier to the AC power source.

Startup Procedure

Step-by-step guide for the initial power-on sequence.

Operation

Operational Precautions and Warnings

Essential precautions and critical warnings for safe amplifier operation.

Front Panel Controls and Indicators

Explanation of the controls and indicators found on the amplifier's front panel.

Back Panel Controls and Connectors

Explanation of the controls and connectors found on the amplifier's back panel.

Advanced Features and Options

Crown SST Modules

Information on optional modules to enhance system versatility and signal routing.

Fault Monitoring System

Details on how to monitor amplifier fault status remotely via an RJ-11 jack.

Optional Barrier Block Outputs

Describes optional barrier block outputs as an alternative to binding posts.

Tamper-Resistant Hole Plugs

How to use plugs to protect front panel level controls from adjustment.

Optional 0.775-V Input Sensitivity

Information on the optional 0.775-V input sensitivity setting.

Principles of Operation

Amplifier Signal Path Explanation

Detailed explanation of the signal processing and amplification stages within the amplifier.

Troubleshooting

Troubleshooting Common Issues

Guide to diagnosing and resolving common power, signal, clip, and fault conditions.

Specifications

Amplifier Performance Specifications

Detailed technical specifications for power, frequency response, and distortion.

Service

International and Canada Service

Procedures for obtaining service outside the United States.

US Service Options

Information on service through authorized US centers or direct factory repair.

Factory Service Shipping and Packing

Instructions for safely shipping products for service, including packing requirements.

Warranty

Warranty Summary and Exclusions

Overview of the warranty coverage, including what is and isn't covered.

Obtaining Warranty Service

Steps to follow to claim warranty service and necessary documentation.

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