McIntosh MA2275 Owner's Manual
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McIntosh MA2275 Owner's Manual

Tube integrated amplifiers
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See also: Service Manual , Programming Manual
Tube Integrated Amplifier
MA2275
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 MA2275

  • Page 1 Tube Integrated Amplifier MA2275 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

    2. When Vacuum Tubes are installed or removed, reattach the Tube Cover with the Original Tube Cover Screws. 3. If the MA2275 has been On, please allow the Hot Vacuum Tubes to cool first before removing them. 4. The following Connecting Cable is available from the McIntosh Parts Department: Data and Power Control Cable Part No.

  • Page 4: Connector Information

    Connector Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input Connectors on the MA2275. Refer to the diagram for con- nection: PIN 1: Shield/Ground PIN 2: + Input PIN 3: - Input Power Control Connectors The MA2275’s Power Control Outputs provide a 5 volt signal.

  • Page 5: Dimensions

    Dimensions The following dimensions can assist in determining the best location for your MA2275. There is additional infor- mation on page 8 pertaining to installing the MA2275 into cabinets. Front View of the MA2275 Rear View of the MA2275 Side View of the MA2275 45.09cm...

  • Page 6: Installation Of Tubes And Tube Cover

    Chassis. Note: Gloves or a soft cloth will prevent “fingerprinting” of the Tubes during their installation. 1. Orient the MA2275 so the right Side Panel is facing you. Refer to figure 1. 2. Using an appropriate screwdriver, remove the Tube Cover Fastening Screw.

  • Page 7: Location And Ventilation

    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 MA2275 will not function if they are inserted into the wrong socket.

  • Page 8: Installation In A Custom Cabinet

    The MA2275 can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a piece of furniture or cabinet of your choice. The four feet may be removed from the bottom of the MA2275 when it is custom installed as out- lined below.

  • Page 9: Top Panel Connections And Tube Locations

    KT88/ 6550 12AT7 KT88/ 6550 RIGHT Channel OUTPUTs connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers 12AX7A Top Panel Connections and Tube Locations 12AX7A 12AX7A 12AX7A LEFT Channel OUTPUTs connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers KT88/ 6550 12AT7...

  • Page 10: Rear Panel Connections

    Main Fuse holder, POWER AMP IN refer to information inputs accept sig- on the back panel nals from a sepa- of your MA2275 to rate external determine the cor- preamplifier rect fuse size and rating Connect the MA2275 power cord to a live AC outlet.

  • Page 11: How To Connect Loudspeakers

    Integrated Amplifier until after Connections have been made. 1. Prepare the Loudspeaker Hookup Cables that attach to the MA2275 by choosing one of the methods below: Bare wire cable ends: Carefully remove sufficient insulation from the cable ends, refer to figures 1, 2 & 3. If the cable is stranded, carefully twist the strands together as tightly as pos- sible.

  • Page 12: How To Connect Audio Components

    8. Connect a Control Cable from the MA2275 CD2 DATA PORT Jack to the McIntosh CD Player Data In Jack. 9. Connect the MA2275 Power Cord to a live AC outlet. Tape Recorder How to Connect Audio Components McIntosh CD Player...

  • Page 13: How To Connect For A Second Room

    2. Connect Hookup Cables from the second Power Ampli- fier to the Loudspeakers. Refer to page 11 in this Owner’s Manual for connection details. 3. Connect a Control Cable from the MA2275 POWER CONTROL MAIN Jack to the Power Control In of a McIntosh Power Amplifier.

  • Page 14: Front Panel Controls, Displays, Push-Buttons And Switch

    Control adjusts the relative volume bal- ance between chan- nels STANDBY/ON POWER Switch Push-button turns turns all AC the MA2275 ON power completely or OFF (Standby) ON or OFF TUBE WARMUP indicates when the audio output is muted until the tubes reach...

  • Page 15: How To Operate

    How to Operate the MA2275 Power On and Off Press the POWER switch to ON, the Red LED above the STANDBY/ON Push-button lights to indicate the MA2275 is in Standby Mode. To Switch On the MA2275 press the STANDBY/ ON Push-button on the...

  • Page 16: Record Monitor

    Using a Separate Power Amplifier There are two different ways to use a separate power am- plifier with a MA2275. The first way is to use the separate amplifier instead of the MA2275 built-in Power Amplifier. Connect the Loudspeakers to the separate...
  • Page 17 Notes...

  • Page 18: Remote Control Push-Buttons

    Level Audio Sources or the Phono Input Notes: Push-buttons whose function is not identified above are for use with other McIntosh Products. The Remote Control shipped with your MA2275 may differ from the illustration above; however, the functionality is the same. Remote Control Push-Buttons...

  • Page 19: How To Operate By Remote Control

    MA2275. Earlier McIntosh source components and other brand source components can be controlled by the MA2275 Remote Control with the ad- dition of a McIntosh Remote Control Translator (RCT). Note: Your McIntosh Dealer can assist you with the installation and operation of the Remote Control Translator (RCT).
  • Page 21 Notes...

  • Page 22: 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 rear panel of the MA2275 for the correct voltage. Preamplifier Tube Compliment 2 - 12AX7A Phono Circuitry...

  • Page 23: Packing Instruction

    The MA2275 Vacuum Tubes must be removed from the Amplifier Tube Sockets and placed into the inside open- ings of the five layer foam packing material. The foam with the tubes located inside are placed into the Amplifier Tube Cover and secured to the Chassis.
  • Page 24 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. 04099200...

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