Page 2 - IMPORTANT SAFETY
2 IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. The lightning flash with arrowhead,within an equilateral triangle, is intendedto alert the user to the presence o...
Page 3 - Please take a short time to read the information in this; Table of Contents
3 Customer Service Technical Assistance Please Take A Moment Thank You Copyright 2004 © by McIntosh Laboratory, Inc. The serial number, purchase date and McIntosh Dealername are important to you for possible insurance claim orfuture service. The spaces below have been provided foryou to record that ...
Page 4 - Caution: To prevent electrical shock make sure that the AC; Connector Information
4 Performance Features Introduction and Performance Features Introduction Now you can take advantage of traditional McIntosh stan-dards of excellence in the MC275 Stereo Power Amplifier.Two 75 watt output channels will drive any high qualityLoudspeaker System to its ultimate performance. TheMC275 re...
Page 6 - Installation of Tubes and Tube Cover; Caution: To prevent electrical shock make sure that the AC; Tube Cover
6 Installation of Tubes and Tube Cover Caution: To prevent electrical shock make sure that the AC POWER CORD IS NOT CONNECTED TO THEMC275 when inserting or removing Tubes, as thereare hazardous voltages present at the pins of theTube Sockets. Your MC275 has gone through an extensive series of per-fo...
Page 7 - Installation of Tubes, Tube Cover, Location and Ventilation; Caution: To prevent electrical shock make sure the MC275; Location and Ventilation; Ball Stud Fasteners
7 Installation of Tubes, Tube Cover, Location and Ventilation Small Signal Tubes: 1. Locate a 12AX7A Tube.2. On the top left side of the amplifier, locate the Tube Socket that has the nomenclature V1 12AX7A nextto it on the chassis. Refer to figure 4 and 5. 3. Orient the Tube so the area where no pi...
Page 8 - Left Side Panel Connections
8 UNBALANCED INPUTSfor audio cables from apreamplifier or controlcenter audio outputs Left Side Panel Connections BALANCED INPUTSfor audio cables from apreamplifier or controlcenter audio outputs RIGHT OUTPUTConnections forloudspeakers LEFT OUTPUTConnections forloudspeakers
Page 9 - Right Side Panel Connection and Fuse Holder
9 Connect the MC275power cord to a liveAC outlet. Refer toinformation on theback panel to deter-mine the correct volt-age Main Fuse holder,refer to informationon the back panelof your MC275 todetermine the cor-rect fuse size andrating Right Side Panel Connection and Fuse Holder
Page 10 - Connect cables from the Balanced Outputs of a McIn-; Note: An optional hookup is to use unbalanced cables.; Prepare the Loudspeaker Hookup Cables that attach to
10 How to Connect for Stereo How to Connect for Stereo 1. Connect cables from the Balanced Outputs of a McIn- tosh Preamplifier or Control Center to the MC275 Leftand Right Balanced Inputs. Note: An optional hookup is to use unbalanced cables. 2. Prepare the Loudspeaker Hookup Cables that attach to ...
Page 11 - How to Connect for Mono Parallel; Connect cables from the Balanced Output of a McIn-; Prepare the Loudspeaker Hookup Cable and Jumper
11 Jumper Cables Refer to page 13for the correctswitch settings How to Connect for Mono Parallel How to Connect for Mono Parallel 1. Connect cables from the Balanced Output of a McIn- tosh Preamplifier or Control Center to the MC275Right Balanced Input. Note: An optional hookup is to use unbalanced ...
Page 12 - Left Side Panel Controls and Switches
12 Left Side Panel Controls and Switches MODE switch selectsMONO (Parallel) orSTEREO Modes ofoperation INPUTS switch se-lects between theBALanced orUNBALanced Inputs Power Switch turns allAC power On or Off UNBALANCEDLEVEL Controls foreach channel when us-ing the Unbalanced In-puts
Page 13 - Power On and Off; Note: If the MC275 is connected to a; Mode Switch; How to Operate the MC275
13 Power On and Off Press the POWER switch to the ON position and soundwill be heard from the Loudspeakers when the tubes havereached their operating temperature. The amount of time ittakes is dependent upon the temperature of the Tubes.Press the POWER Switch to the Off posi-tion to stop amplifying ...
Page 14 - Greater than 14; Note: Refer to the right side panel of the MC275 for the
14 Specifications Specifications Power Output Stereo Minimum sine wave continuous average power output perchannel, both channels operating is:75 watts into 4, 8 or 16 ohm load Power Output Mono (Parallel) Minimum sine wave continuous average power output is:150 watts into 2 ohm, 4 ohm or 8 ohm load ...
Page 16 - Chambers Street
McIntosh Part No. 04091201 McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, NY 13903 The continuous improvement of its products isthe policy of McIntosh Laboratory Incorporatedwho reserve the right to improve design withoutnotice. Printed in the U.S.A.
