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McIntosh MA7900 User Manual

McIntosh MA7900
36 pages
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McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com
MA7900
Integrated Amplifier
Owner’s Manual

Table of Contents

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McIntosh MA7900 Specifications

General IconGeneral
Power Output per Channel200 watts
Number of Channels2
Speaker Impedance2, 4, or 8 ohms
Rated Power Band20Hz - 20kHz
Total Harmonic Distortion0.005%
S/N Ratio (High Level)100 dB
Signal to Noise Ratio100 dB
Input Impedance (Balanced)20K Ohms
Input Impedance (Unbalanced)20K Ohms
Voltage Gain (High Level)26 dB
Voltage Gain (Phono)60dB
Headphone OutputYes
Phono InputYes
Balanced InputYes
Unbalanced InputYes
Digital USB InputNo
Digital Coaxial InputNo
Digital Optical InputNo
Tone ControlsYes
RS232 Control InputYes
Power Control OutputYes
Rear Panel IR Sensor InputYes
Weight75 lbs (34.1 kg) net, 93 lbs (42.2 kg) in shipping carton
Damping FactorGreater than 40
Maximum Output Voltage (Unbalanced)4V
Maximum Output Voltage (Balanced)8V

Summary

Important Safety Instructions

General Information and Connectivity

General Information

Overview of the MA7900's features, power, and operational notes.

Connector and Cable Types

Details on various connectors: XLR, Data Ports, RS232, IR IN, and Plug-In Jumper.

Introduction and Performance Features

Introduction to the MA7900

Overview of the MA7900 Integrated Amplifier and its sonic qualities.

Key Performance Features

Details key features: Power Output, Power Guard, Digital Inputs, EQ, and more.

MA7900 Dimensions

MA7900 Installation Guide

MA7900 Rear Panel Connections

Connecting Components

Power Control & Data Connections

Connecting power and data cables for automatic switching and remote operation.

Audio and Other Input Connections

Connecting audio sources, optional digital inputs, USB, and ground connections.

Sensor Connection

How to connect an external sensor for remote control.

Passthru Connections for Multichannel Systems

Connecting for Bi-Amplification

Connecting Loudspeaker Hookup Cables

Output Terminal Connection Steps

Detailed steps for connecting loudspeaker hookup cables to the MA7900 amplifier.

Loudspeaker Wiring and Safety

Guidance on wire gauge, terminal preparation, and safety precautions for loudspeaker connections.

MA7900 Remote Control Overview

Operating the MA7900 with Remote Control

Input Source and Volume Control

Selecting sources and adjusting listening volume using the remote control.

Disc, Server & Tuner Operations

Using remote buttons for disc players, music servers, and tuner functions.

Trim and Amplifier Settings

Accessing and adjusting trim functions, and amplifier output selection.

MA7900 Front Panel Controls

Input, Trim, and Volume Controls

Using the input, trim, and volume controls for source selection and level adjustment.

Speaker Output and Headphone Selection

Controlling speaker outputs (1 & 2) and using the headphone jack.

Equalizer, Bypass, Mute, and Status Indicators

Operating equalizer, bypass, mute functions, and understanding display indicators.

Standby and Reset Functions

Using the standby/on button and understanding the reset function.

Operating the Setup Mode

Default Settings Reference

Overview of factory default settings for various functions and their corresponding page numbers.

Firmware and Input Reassignment

Firmware Version Identification

How to identify the System and USB Audio firmware versions using the setup mode.

Source Input Reassignment

How to reassign high-level inputs to balanced or digital connectors.

Customizing Input Names

Passthru and Trigger Control Configuration

Passthru Mode Setup

Enabling Passthru mode for multichannel systems and selecting the input source.

Power Control Trigger Settings

Configuring Power Control Trigger outputs for various activation methods.

Comm Port Baud Rate Configuration

Remote Control Code and Power Mode Settings

Remote Control Code Selection

Switching between Normal and Alternate Remote Control codes to prevent interference.

Power Mode and Auto Off Feature

Managing the automatic power saving standby/off mode and how to disable it.

Operating the MA7900: On/Off and Source/Volume

Power On and Off Procedures

Steps to turn the MA7900 on and off, and initial startup indications.

Source Selection and Volume Adjustment

Selecting desired input sources and adjusting listening volume levels.

MA7900 Trim Function Adjustments

Balance and Equalizer Adjustments

Adjusting channel balance and enabling/bypassing the equalizer.

Trim Level Setting

Setting relative volume levels for different sources to ensure consistent listening.

Mono/Stereo, Phono, and Display Settings

Mono/Stereo Mode Selection

Changing the audio mode from Stereo to Mono for individual input sources.

Phono Adjustments

Adjusting MC phono cartridge loading values for optimal performance.

Display Brightness Control

Adjusting the brightness of the front panel display.

Advanced MA7900 Operation Features

Digital Audio Display and Meter Backlight

Controlling digital audio display info and meter illumination.

Equalizer Bypass and Trim Access

Bypassing equalizer and accessing trim functions for audio adjustments.

Mute and Headphone Jack Usage

Muting audio output and connecting headphones for private listening.

MA7900 Output and Amplifier Usage

Power Output Meters and Power Guard

Understanding power meters and the function of power guard indicators.

Making Recordings

Steps for selecting a source and making a recording using the MA7900.

Using Separate Power Amplifiers

Methods for integrating separate power amplifiers with the MA7900.

Using Output 2 for Remote Amplification

Connecting an external amplifier to Output 2 for remote listening.

Passthru Mode and Equalizer Functionality

Passthru Mode Operation Details

How the Passthru mode functions with multichannel systems and A/V control centers.

Equalizer Controls Explanation

Details on the five-band equalizer controls and their effect on frequency ranges.

Digital Inputs and System Reset Procedures

Optical, Coaxial, and USB Digital Inputs

Operating digital inputs and USB connection with a computer.

Microprocessor and Default Settings Reset

Resetting microprocessors and restoring all adjustable settings to factory defaults.

MA7900 Amplifier Specifications

MA7900 General Specifications

MA7900 Packing Instructions

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