6
1. For additional connection information, refer to the
owner’s manual(s) for any component(s) connected
to the MC275.
2. The MC275 mutes the speaker output for approxi-
mately fifteen seconds when first turned on.
3. For the best performance and safety it is important
to always match the impedance of the loudspeaker
to the Power Amplifier connections. Refer to pages
10 thru 13.
Note: The impedance of a Loudspeaker actually var-
ies as the Loudspeaker reproduces different
frequencies. As a result, the nominal impedance
rating of the Loudspeaker (usually measured at
a midrange frequency) might not always agree
with the impedance of the Loudspeaker at low
frequencies where the greatest amount of power
is required. Contact the Loudspeaker Manufac-
turer for additional information about the actual
impedance of the Loudspeaker before connecting
it to the McIntosh MC275.
4. The Ω is the symbol for the word ohms and refers
to the impedance of the Output Terminals of the
MC275.
5. When discarding the unit, comply with local rules
or regulations. Batteries should never be
thrown away or incinerated but disposed
of in accordance with the local regulations
concerning battery disposal.
6. For additional information on the MC275
and other McIntosh Products please visit
the McIntosh Web Site at www.mcintosh-
labs.com.
Thank You
Please Take A Moment
Technical Assistance
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 additional help concerning a suspected problem,
you can receive technical assistance for all McIntosh
products at:
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-1545
Fax: 607-724-0549
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 assistance 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
Copyright 2011 © by McIntosh Laboratory, Inc.
Table of Contents
Your decision to own this McIntosh MC275 Tube
Power Amplifier ranks you at the very top among
discriminating music listeners. You now have “The
Best.” The McIntosh dedication to “Quality,” is as-
surance 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 pos-
sible with all the features and functions of your new
McIntosh.
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:
Serial Number: _______________________________
Purchase Date: _______________________________
Dealer Name: ________________________________
Safety Instructions ...................................................2-3
Unpacking the MC275 and Ventilation ....................4-5
Thank You and Please Take a Moment .......................6
Technical Assistance and Customer Service ..............6
Table of Contents ........................................................6
General Information ...................................................6
Connector Information ...............................................7
Introduction .................................................................7
Performance Features .................................................7
Dimensions .................................................................8
Left Side Connections; Indicator and Switch: Right
Side Connection, Fuse Holder and Switch ..................9
How to Connect for Stereo Operation ......................10
Connection Diagram (Separate Sheet) ............Mc1A
How to Connect for Monaural Operation .................12
Connection Diagram (Separate Sheet) ............Mc1B
Right Side Switch, Left Side Switch and Indicators . 14
How to Operate ......................................................... 15
Photos ................................................................... 16 -17
Specifications ............................................................ 18
Packing Instruction ................................................... 19
General Information
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