McIntosh MC275 Owner's Manual
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McIntosh MC275 Owner's Manual

Mcintosh owner's manual stereo power amplifier mc275
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See also: Service Manual , Maintenance Manual
Stereo Power Amplifier
MC275
Owner's Manual
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549

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Summary of Contents for McIntosh MC275

  • Page 1 Stereo Power Amplifier MC275 Owner’s Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549...

  • Page 2: Important Safety Instructions

    The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO...

  • Page 3: Table Of Contents

    Phone: 607-723-1545 Fax: 607-723-3636 Customer Service If it is determined that your McIntosh product is in need of repair, you can return it to your Dealer. You can also return it to the McIntosh Laboratory Service Department. For as- sistance on factory repair return procedure, contact the McIntosh Service Department at: McIntosh Laboratory, Inc.

  • Page 4: Important Information

    2. When Vacuum Tubes are installed or removed make sure to reattach the Tube Cover to the MC275 Chassis. 3. If the MC275 has been On, please allow the Hot Vacuum Tubes to cool first before removing them. 4. For additional connection information, refer to the owner’s manual(s) for any component(s) connected to the MC275.

  • Page 5: Dimensions

    MC275 Dimensions The following dimensions can assist in determining the best location for your MC275. There is additional informa- tion on page 7 pertaining to installing the MC275 into cabi- nets. Front View of the MC275 " -3/4 4.45cm Top View of the MC275...

  • Page 6: Installation Of Tubes And Tube Cover

    There are two different types of Small Signal Tubes (12AX7A and 12AT7) used in each channel. Tube type can be found on the outside of the Tube. The MC275 will not function if they are inserted into the wrong socket.

  • Page 7: Location And Ventilation

    Refer to figure 6. Location and Ventilation The MC275 can be placed upright on a table or shelf, standing on its four feet. It also can be installed in a piece of furniture of your choice. Do not install the MC275 di- rectly above a heat generating component.

  • Page 8: Left Side Panel Connections

    LEFT OUTPUT Connections for loudspeakers RIGHT OUTPUT Connections for loudspeakers BALANCED INPUTS for audio cables from a preamplifier or control center audio outputs UNBALANCED INPUTS for audio cables from a preamplifier or control center audio outputs Left Side Panel Connections...

  • Page 9: Right Side Panel Connection And Fuse Holder

    AC outlet. Refer to information on the back panel to deter- mine the correct volt- Main Fuse holder, refer to information on the back panel of your MC275 to determine the cor- rect fuse size and rating...

  • Page 10: How To Connect For Stereo

    16S (ohm) are provided. If the Loudspeaker’s imped- ance is in-between the available connections, use the nearest lower impedance connection. 4. Place the MC275 POWER Switch to the OFF Position and connect the supplied power cord to an active AC outlet.

  • Page 11: How To Connect For Mono Parallel

    Loudspeaker’s impedance is in-between the avail- able connections, use the nearest lower impedance con- nection. 4. Place the MC275 POWER Switch to the OFF Position and connect the supplied power cord to an active AC outlet. 5. Refer to page 13 for the correct settings of the MODE and INPUT Switches.

  • Page 12: Left Side Panel Controls And Switches

    Power Switch turns all AC power On or Off Left Side Panel Controls and Switches UNBALANCED LEVEL Controls for each channel when us- ing the Unbalanced In- puts MODE switch selects MONO (Parallel) or STEREO Modes of operation INPUTS switch se- lects between the BALanced or UNBALanced Inputs...

  • Page 13: How To Operate

    Press the POWER Switch to the Off posi- tion to stop amplifying the audio signal. Refer to figure 7. Note: If the MC275 is connected to a McIntosh Preamplifier, Control Center or A/V Center, the addition of a McIntosh Power Controller such as a PC4 will allow the MC275 to switch On and Off automatically.

  • Page 14: Specifications

    120 Volts, 50/60Hz at 3.6 amps 220 Volts, 50/60Hz at 1.8 amps 230 Volts, 50/60Hz at 1.8 amps 240 Volts, 50/60Hz at 1.8 amps Note: Refer to the right side panel of the MC275 for the correct voltage. Overall Dimensions Width is 16-1/2 inches (41.91cm) Height is 8-1/4 inches (20.96cm) including feet...

  • Page 15: Packing Instructions

    The MC275 Vacuum Tubes must be removed from the Am- plifier Tube Sockets and placed into the inside open- ings of the four layer foam packing material. The foam with the tubes located inside are placed into the Amplifier Tube Cover and secured to the Chassis.
  • Page 16 McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice. Printed in the U.S.A. McIntosh Part No. 04091201...

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