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Customer Service
Technical Assistance
Please Take A Moment
Thank You
Copyright 2004 © by McIntosh Laboratory, Inc.
The serial number, purchase date and McIntosh Dealer
name are important to you for possible insurance claim or
future service. The spaces below have been provided for
you to record that information:
Your decision to own this McIntosh MA2275 Tube Inte-
grated Amplifier ranks you at the very top among discrimi-
nating music listeners. You now have “The Best.” The
McIntosh dedication to “Quality,” is assurance that you
will receive many years of musical enjoyment from this
unit.
Please take a short time to read the information in this
manual. We want you to be as familiar as possible with all
the features and functions of your new McIntosh.
Serial Number:
Purchase Date:
Dealer Name:
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.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3515
Fax: 607-723-1917
If at any time you have questions about your McIntosh
product, contact your McIntosh Dealer who is familiar with
your McIntosh equipment and any other brands that may
be part of your system. If you or your Dealer wish addi-
tional help concerning a suspected problem, you can re-
ceive technical assistance for all McIntosh products at:
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-1545
Fax: 607-723-3636
Table of Contents
Safety Instructions ............................................................ 2
Thank You and Please Take a Moment............................. 3
Technical Assistance and Customer Service .................... 3
Table of Contents and Important Information .................. 3
Connector Information ..................................................... 4
Introduction ...................................................................... 4
Performance Features ....................................................... 4
Dimensions ....................................................................... 5
Installation of Tubes, Equipment Location
and Ventilation .................................................................. 6
Installation in a Custom Cabinet ...................................... 8
Top Panel Connections and Tube Locations .................... 9
Rear Panel Connections.................................................. 10
How to Connect Loudspeakers....................................... 11
How to Connect Audio Components .............................. 12
How to Connect for a Second Room .............................. 13
Front Panel Controls, Displays, Push-Buttons
and Switch ...................................................................... 14
How to Operate............................................................... 15
Remote Control Push-Buttons ........................................ 18
How to Operate by Remote Control ............................... 19
Specifications ................................................................. 22
Packing Instruction ......................................................... 23
Important Information
1. Caution: To prevent electrical shock make sure the AC
POWER CORD IS NOT CONNECTED TO THE
MA2275 . Also do not touch the Vacuum Tube
Connection Pins when inserting or removing them,
as there may be hazardous voltages present at the
Tube Socket Pins even after the MA2275 has been
switched Off for a period of time.
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. 170-202
Six foot, 2 conductor shielded, with two 1/8 inch stereo
mini phone plugs.
5. For additional connection information, refer to the owner’s
manual(s) for any component(s) connected to the MA2275.
6. It is very important that loudspeaker cables of adequate size
be used, so that there will be minimum power loss. The size is
specified in Gauge Numbers or AWG (American Wire Gauge).
The smaller the Gauge number, the larger the wire size.
Connection Terminals will accept up to a 8 AWG wire size:
If your loudspeaker cables are 50 feet (38.1m) or less,
use at least 14 Gauge.
If your loudspeaker cables are 100 feet (76.2m) or less,
use at least 12 Gauge.