Crest Audio Stereo Amplifier - User Manual

PROFESSIONAL
POWER AMPLIFIERS
OWNER’S MANUAL
Including MA Series Amplifiers
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8001 Professional Power Amplifier
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7301 Professional Power Amplifier
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7001 Professional Power Amplifier
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MA9130 Professional Power Amplifier
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MA7120 Professional Power Amplifier
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MA5850 Professional Power Amplifier
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6001 Professional Power Amplifier
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4801 Professional Power Amplifier
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4601 Professional Power Amplifier
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3301 Professional Power Amplifier
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10004 Professional Power Amplifier
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10001 Professional Power Amplifier
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9001 Professional Power Amplifier
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Summary

Important Precautions

Introduction to Crest Audio Amplifiers

Unpacking and Mounting Procedures

Cooling Requirements and Operating Precautions

Specific Amplifier Model Introductions

Features of Models 3301, 4801, 6001, 4601, and 7001

Model 7301 Features

Model 8001 Features

Model 9001 Features

Model 10001 Features

Model 10004 Features

Connecting Inputs, Outputs, and Accessories

Connecting Power and Operation Modes

Bridging Precautions

Switches & Controls

AC Power Switch;Circuit Breaker

Function and operation of the combined power switch and circuit breaker.

Input Attenuators

How to adjust input gain levels for optimal performance and headroom.

Mode Select Switch

Setting the amplifier's operating mode (Stereo, Parallel, Bridged).

Signal Ground Lift Jumper

Procedure for lifting the signal ground to prevent noise or ground loops.

Amplifier Indicators Explained

Clip;Limit LED

Indicates clipping or gain reduction, warning of potential signal distortion.

Signal LED

Shows when an output signal is present and being amplified.

Temp;DC LED

Alerts to DC voltage on output, overheating, or turn-on delay conditions.

Active LED

Confirms the channel's output relay is closed and the amplifier is operational.

Protection Features Overview

Clip Limiting

Automatically reduces gain to prevent amplifier clipping and speaker damage.

IGM Impedance Sensing

Adjusts gain to safely handle stressful load conditions and prevent damage.

Specific Protection Mechanisms

AutoRamp Signal Control

Function and benefits of the AutoRamp circuitry for smooth power-up and protection recovery.

Speaker Protection Guidelines

Advice on protecting loudspeakers from amplifier output characteristics and power levels.

User Responsibility and Service Information

Appendix A: Professional Series Block Diagram

Appendix B: Model 3301 Specifications

Appendix B: Model 4601 Specifications

Appendix B: Model 4801 Specifications

Appendix B: Model 6001 Specifications

Appendix B: Model 7001 Specifications

Appendix B: Model 7301 Specifications

Appendix B: Model 8001 Specifications

Appendix B: Model 9001 Specifications

Appendix B: Model 10001 Specifications

Appendix B: Model 10004 Specifications

Appendix C: Wire Gauge Charts

Appendix D: Meyer-Compatible Amplifiers

MA5850 Amplifier Details

Specifics on the MA5850's custom circuitry, output limiting, and Meyer Type 1 compatibility.

MA7120 Amplifier Details

Specifics on the MA7120's design for bridged mode and Meyer Type 3 compatibility.

MA9130 Amplifier Details

Specifics on the MA9130's custom circuitry, low-noise fan, and Meyer Type 2 compatibility.

Crest Audio Stereo Amplifier Specifications

General

Brand	Crest Audio
Model	Stereo Amplifier
Category	Amplifier
Language	English