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McIntosh MC275 50th Anniversary User Manual

McIntosh MC275 50th Anniversary
20 pages
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McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com
MC275 50
th
Anniversary
Tube Power Amplier
Owner’s Manual
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McIntosh MC275 50th Anniversary Specifications

General IconGeneral
Power Output75 watts per channel
Number of Channels2
Total Harmonic Distortion0.5%
Signal to Noise Ratio105dB
Input Sensitivity1.2V
Tube Complement3 x 12AX7A, 4 x KT88, 4 x 12AT7
Dynamic Headroom1.2dB
Damping Factor14
Rated Power Band20Hz to 20kHz
Frequency Response20Hz to 20kHz
Weight67 lbs
Frequency Response Extension10Hz to 70kHz
Output Impedance4, 8, 16 ohms

Summary

Safety Instructions

Important Safety Instructions

Critical warnings and guidelines for safe operation and handling of the equipment.

Fire and Electrical Shock Safety Warnings

Specific warnings about exposure to rain, moisture, and electrical shock hazards.

Unpacking and Initial Setup

Unpacking the MC275 Power Amplifier

Instructions for removing the amplifier from its packaging and initial preparations.

Foam Insert Removal for Safety

Critical steps to remove foam insert before connecting power to prevent fire hazard.

Ventilation Guide

MC275 Ventilation Requirements

Guidelines for ensuring adequate airflow for heat dissipation and product longevity.

Product Overview and Support

MC275 Introduction and Features

Overview of the amplifier's sonic qualities and key performance features.

Connector and Cable Information

Details on XLR and Power Control connectors for system integration.

Physical Specifications

MC275 Physical Dimensions

Diagrams and measurements for physical placement of the amplifier.

Connections and Controls

Amplifier Rear and Side Panel Layout

Explanation of left and right side connections, indicators, and switches.

Setup Procedures

Connecting for Stereo Operation

Step-by-step guide for connecting loudspeakers in stereo mode.

Loudspeaker Connection and Impedance Details

Details on connecting cables to output terminals and impedance matching.

Setup Procedures (Monaural)

Connecting for Monaural Operation

Instructions for connecting loudspeakers in mono mode.

Monaural Connections and Jumper Bars

Details on jumper bars, impedance matching for mono mode.

Controls and Indicators

Amplifier Switches and LED Indicators

Explanation of power, input, mode switches, and LED indicator meanings.

Operating the MC275

MC275 Operation Guide

Comprehensive instructions for operating the amplifier.

Power On/Off and Remote Control

How to turn the amplifier on and off manually or via remote.

Auto Off and Sentry Monitor Features

Explanation of power saving and tube protection circuits.

Visual Reference

MC275 Amplifier Photos

Photographic views of the McIntosh MC275 amplifier.

Technical Specifications

MC275 Detailed Specifications

Detailed specifications including power output, impedance, and dimensions.

Packaging and Shipping

MC275 Repacking Instructions

Step-by-step guide for securely repacking the amplifier for shipment.

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