Crown D-45 User Manual

Operation Manual
D-45
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, Amcron and IOC are registered trademarks of Crown International. Other trademarks are the property of
their respective owners.
Some models may be exported under the name Amcron.
®
©2003 by Crown Audio Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 574-294-8000
125243-6
2/03
D Series
D-75A
SIGNAL
IOC
CHANNEL 1 CHANNEL 2
HEADPHONES POWER
OFF ON
LEVEL
30
50
40
0
10
20
LEVEL
30
50
40
0
10
20

Crown D-45 Specifications

General

Input Impedance	20k ohms balanced, 10k ohms unbalanced
Frequency Response	20Hz to 20kHz
Total Harmonic Distortion	0.05%
Input Sensitivity	0.775V or 1.4V for full output
Cooling	Convection
Dimensions	19 x 1.75 x 9.25 inches
Weight	10 kg
Signal to Noise Ratio	105 dB below rated output, 20 Hz to 20 kHz

Summary

Important Safety Instructions and Compliance

General Safety Precautions and Warnings

Essential safety guidelines for operating the amplifier, including electrical and environmental hazards.

Declaration of Conformity

EMC and Safety Standards Compliance

Lists the EMC and safety standards the D Series amplifiers conform to.

Amplifier Setup and Installation

Installation and Rack Mounting Guidelines

Ensuring Proper Cooling and Ventilation

Wiring and Connections Guide

Input Connector Pin Assignments

Output Wire and Connector Selection

System Wiring Modes

Dual Mode System Wiring

Bridge-Mono Mode System Wiring

Power Connection and Startup

Connecting to AC Mains Power

Guidelines for connecting the amplifier to the AC power source safely.

Amplifier Startup Procedure

Operation Precautions and Warnings

General Operating Precautions

Critical Operational Warnings

Warnings about headphone use, output connections, tampering, and overdrive.

Troubleshooting Common Issues

Power Indicator Off Troubleshooting

Diagnosing why the power indicator may not be lit.

Distorted Sound Troubleshooting

Identifying causes and solutions for distorted audio output.

No Sound Troubleshooting

Steps to take when the amplifier has power but no audio output.

No Input Signal Troubleshooting

Diagnosing issues when the signal indicator does not light up.

Technical Specifications Overview

Guaranteed Power Output Ratings

Lists the minimum guaranteed power output for various loads and modes.

Performance Characteristics

Details frequency response, distortion, signal-to-noise, and damping factor.

Physical and Electrical Specifications

Detailed Power Output Matrices

D-45 Power Output Matrix

Comprehensive table of power outputs for the D-45 across different conditions.

D-75A Power Output Matrix

Comprehensive table of power outputs for the D-75A across different conditions.

Product Warranty Details

Warranty Summary and Exclusions

Outlines the terms, coverage, and exclusions of the Crown warranty.

Obtaining Warranty Service (US/Canada)

Worldwide Warranty Service

Obtaining Warranty Service (Worldwide)