McIntosh MC-126 User Manual
MC126 Power Amplifier
Owners
Manual
MC126
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549
The lightning flash with arrowhead,
within an equilateral triangle, is intended
to alert the user to the presence of
uninsulated dangerous voltage within
the products enclosure that may be of
sufficient magnitude to constitute a risk
of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the
user to the presence of important
operating and maintenance (servicing) instructions in the literature accompanying the appliance.
WARNING - TO REDUCE RISK OF
FIRE OR ELECTRICAL SHOCK, DO
NOT EXPOSE THIS EQUIPMENT TO
RAIN OR MOISTURE.
IMPORTANT SAFETY
INSTRUCTIONS!
PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.
General:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Warning: To reduce risk of fire or electrical shock,
do not expose this equipment to rain or moisture.
This unit is capable of producing high sound pressure levels. Continued exposure to high sound pressure levels can cause permanent hearing impairment or loss. User caution is advised and ear protection is recommended when playing at high volumes.
6. Caution: to prevent electrical shock do not use this
(polarized) plug with an extension cord, receptacle
or other outlet unless the blades can be fully inserted to prevent blade exposure.
Attention: pour pevenir les chocs elecriques pas
utiliser cette fiche polarisee avec un prolongateur,
une prise de courant ou un autre sortie de courant,
sauf si les lames peuvent etre inserees afond ans en
laisser aucune partie a decouvert.
7. Unplug this equipment during lightning storms or
when unused for long periods of time.
8. Only use attachments/accessories specified by the
manufacturer.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
To prevent the risk of electric shock, do not remove cover or
back. No user serviceable parts inside.
Installation:
9. The equipment shall be installed near the AC Socket
Outlet and the disconnect device shall be easily accessible.
10. Do not block any ventilation openings. Install in accordance with the manufacturers instructions.
11. Do not install near any heat sources such as radiators,
heat registers, stoves, or other equipment (including
amplifiers) that produce heat.
12. Do not use this equipment near water.
13. Do not expose this equipment to dripping or splashing
and ensure that no objects filled with liquids, such as
vases, are placed on the equipment.
14. Use only with the cart, stand, tripod,
bracket, or table specified by the manufacturer, or sold with the equipment.
When a cart is used, use caution when
moving the cart/equipment combination
to avoid injury from tip-over.
Connection:
15. Connect this equipment only to the type of AC power
source as marked on the unit.
16. Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles,
and the point where they exit from the equipment.
17. Do not defeat the safety purpose of the polarized or
grounding-type plug.
2
A polarized plug has two blades with one wider
than the other. A grounding type plug has two
blades and a third grounding prong. The wide
blade or the third prong are provided for your
safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the
obsolete outlet.
18. Do not overload wall outlets, extension cords or integral convenience receptacles as this can result in a risk
of fire or electric shock.
19. To completely disconnect this equipment from the AC
Mains, disconnect the power supply cord plug from the
AC receptacle.
Care of Equipment:
20. Clean only with a dry cloth.
21. Do not permit objects or liquids of any kind to be
pushed, spilled and/or fall into the equipment through
enclosure openings.
22. Unplug the power cord from the AC power outlet
when left unused for a long period of time.
Thank You
Your decision to own this McIntosh MC126 Power Amplifier ranks you at the very top among discriminating 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.
Please Take A Moment
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:
Technical Assistance
Repair of Equipment:
23. Refer all servicing to qualified service personnel. Servicing is required when the equipment has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen
into the equipment, the equipment has been exposed to
rain or moisture, does not operate normally, or has
been dropped.
24. Do not attempt to service beyond that described in the
operating instructions. All other service should be referred to qualified service personnel.
25. When replacement parts are required, be sure the service technician has used replacement parts specified by
McIntosh or have the same characteristics as the original part. Unauthorized substitutions may result in fire,
electric shock, or other hazards.
26. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks
to determine that the product is in proper operating
condition.
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: 607-723-3636
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 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 2001 ã by McIntosh Laboratory, Inc.
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Table of Contents
Introduction and Performance Features
Safety Instructions ............................................................ 2
Thank You and Please Take a Moment............................. 3
Technical Assistance and Customer Service .................... 3
Table of Contents and General Notes ............................... 4
Introduction ...................................................................... 4
Performance Features ....................................................... 4
Dimensions ....................................................................... 5
Installation ........................................................................ 6
Rear Panel Connections and Switch ................................. 7
How to Connect for Six Channels .................................... 8
How to Connect for Three Channels .............................. 10
Front Panel Displays and Controls ................................. 12
How to Operate ............................................................... 13
Specifications ................................................................. 14
Packing Instruction ......................................................... 15
General Notes
1. The following Connecting Cable is available from the
McIntosh Parts Department:
Power Control Cable Part No. 170-202
Six foot, 2 conductor shielded, with two 1/8 inch stereo
mini phone plugs.
2. For additional connection information, refer to the owners
manual(s) for any component(s) connected to the MC126.
3. The MC126 mutes the speaker outputs for approximately two
seconds when first turned on.
4. It is very important that loudspeaker cables of adequate size
be used, so that there will be no power loss. The size is
specified in Gauge Numbers or AWG, (American Wire Gauge).
The smaller the Gauge number, the larger the wire size. The
MC126 Loudspeaker Connection Terminals will accept up to a
10 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.
5. In the event that the MC126 over heats, due to improper
ventilation and/or high ambient temperature, the protection
circuits will activate. The Front Panel Power Guard LEDs
will continuously indicate ON and the audio will be muted.
When the MC126 has returned to a safe operating
temperature, normal operation will resume.
6. The Multi-Channel Input DB25 Connector allows for easy
connecting of a McIntosh MX130/132 or C39 A/V Control
Center, Audio and Power Control connections, to the MC126.
If a McIntosh MSE1 Surround Expander is connected to the
MX130/132 or C39, then discrete Audio and Power Control
Cables should be used between them and the MC126. The
Diagram and Pin Identification list for the Multi-Channel
Input is as follows:
Multi-Channel Input
Multi-Channel Amp DB25 Connector Pin Layout
1. Left Front + 14. Left Front Gnd.
2. Center Front + 15. Center Front Gnd.
3. Right Front + 16. Right Front Gnd.
4. N/C 17. N/C
5. Left Surround + 18. Left Surround Gnd.
6. Right Surround + 19. Right Surround Gnd.
7. Left Back Surround + 20. Left Back Surround Gnd.
8. Right Back Surround + 21. Right Back Surround Gnd.
9. N/C 22. N/C
10. N/C 23. N/C
11. N/C 24. System Calibrate Gnd.
12. System Calibrate 25. Power Control Gnd.
13. Power Control In
Introduction
Now you can take advantage of traditional McIntosh standards of excellence in the MC126 Power Amplifier. Six
120 watt high current output channels will drive any high
quality loudspeaker system to its ultimate performance.
The MC126 reproduction is sonically transparent and absolutely accurate. The McIntosh Sound is The Sound of the
Music Itself.
Performance Features
· Power Output
The MC126 consists of six separate power amplifier channels, each capable of 120 watts into 4 ohm speakers with
less than 0.005% distortion. It may also be used as a Three
Channel Amplifier with each channel capable of 275 watts
into 8 ohm speakers.
· High Current Output
A peak output current of 10 amperes per channel ensures
that the MC126 will successfully drive high quality loudspeakers such as McIntosh for a truly exciting sound experience.
· Power Guard
The MC126s Patented McIntosh Power Guard Circuits
prevent each of the amplifier channels from being
overdriven into clipping, with its harsh distorted sound that
can also damage your valuable loudspeakers.
· Sentry Monitor and Thermal Protection
McIntosh Sentry Monitor power output stage protection
circuits ensure the MC126 will have a long and trouble free
operating life. Built-in Thermal Protection Circuits guard
against overheating.
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Dimensions
The following dimensions can assist in determining the
best location for your MC126. There is additional information on the next page pertaining to installing the MC126
into cabinets.
17-
1/2
44.45cm
Dimensions
"
Front View of the MC126
Rear View of the MC126
17"
43.18cm
13 -
1/4
33.66cm
7-
5/8
7-
1/8
18.10cm
6-
5/16
16.03cm
"
19.37cm
"
"
"
Side View of the MC126
13/16
2.06cm
18-
1/2
"
46.99cm
17"
43.18cm
6-
1/2
3/16
"
0.48cm
"
14-
1/16
35.72cm
"
7/8
2.22cm
"
16.51cm
"
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