Owner’s Manual
MC402 Power Amplifier
MC402
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 product’s 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 manufacturer’s 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.
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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.
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.
Thank You
Your decision to own this McIntosh MC402 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
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 2002 by McIntosh Laboratory, Inc.
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Introduction and Performance Features
Table of Contents |
|
Connector Information |
Safety Instructions ............................................................ |
2 |
Thank You and Please Take a Moment............................. |
3 |
Technical Assistance and Customer Service .................... |
3 |
Table of Contents, Important Information and |
|
Connector Information ..................................................... |
4 |
Introduction ...................................................................... |
4 |
Performance Features ....................................................... |
4 |
Dimensions ....................................................................... |
5 |
Installation ........................................................................ |
6 |
Top View........................................................................... |
8 |
Rear Panel Connections and Switches ............................. |
9 |
How to Connect for Stereo ............................................. |
10 |
How to Connect for Mono .............................................. |
12 |
Front Panel Displays and Controls ................................. |
14 |
How to Operate............................................................... |
15 |
Technical Description ..................................................... |
17 |
Specifications ................................................................. |
18 |
Packing Instructions ....................................................... |
19 |
Important Information
Caution: The MC402 Amplifier weight is 110.5 pounds (50.1 kilograms). It requires two or more persons to safely handle when moving the amplifier.
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 owner’s manual(s) for any component(s) connected to the MC402.
3.The MC402 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:
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 MC402 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 MC402 has returned to a safe operating temperature, normal operation will resume.
6.The MC402 incorporates the very latest in Fully Double
Balanced Circuitry. As a result, the Loudspeaker - Negative Connections are above chassis ground and are not common between channels. Do not combine any connections together or ground them, except as illustrated in this manual.
XLR Connectors
Below is the Pin configuration for the XLR Balanced Input and Output Connectors on the MC402. Refer to the diagram for connection:
PIN 1: Shield/Ground PIN 2: + Input
PIN 3: - Input
Power Control and Trigger Connectors
The MC402’s Power Control Outputs provide a 5 volt signal. Use a 1/8 inch stereo mini
phone plug to connect to the Positive Power Control Input on other
N/C
McIntosh Components.
Ground
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Introduction
Now you can take advantage of traditional McIntosh standards of excellence in the MC402 Power Amplifier. Two 400 watt high current output channels will drive any high quality Loudspeaker system to its ultimate performance.
The MC402 reproduction is sonically transparent and absolutely accurate. The McIntosh Sound is “The Sound of the Music Itself.”
Performance Features
• Power Output
The MC402 consists of two separate power amplifier channels, each capable of 400 watts into 2, 4 or 8 ohm speakers with less than 0.005% distortion.
• Exclusive Double Balanced Circuity
Each channel of the MC402 consists of two balanced power amplifiers operating in push-pull with their outputs combined in a McIntosh Autoformer. This double balanced configuration from input to output cancels virtually all distortion.
• Patented Autoformers
McIntosh designed and manufactured Output Autoformers provide an ideal match between the amplifier output stages and speaker loads of 2, 4 and 8 ohms. The Autoformers also provide perfect DC protection for your valuable Loudspeakers.
• Patented Power Guard
Both channels include the patented McIntosh Power Guard circuit that prevents the amplifier from being over driven into clipping, with its harsh distorted sound that can also damage your valuable Loudspeakers.
•Patented Sentry Monitor with Thermal Protection
McIntosh Sentry Monitor power output stage protection circuits ensure the MC402 will have a long and trouble free operating life. Built-in Thermal Protection Circuits guard against overheating.
•Power Control
The McIntosh Power Control Circuit allows for remote turn-on of the MC402 Power Amplifier from a McIntosh Audio/Video Control Center or Preamplifier. If any additional McIntosh Power Amplifiers are part of the system a delayed Power Control Output Trigger is available. This delayed trigger reduces the strain on the house’s electrical wiring and protection devices.
• Balanced and Unbalanced Inputs
Balanced connections guard against induced noise and allow long cable runs without compromising sound quality.
• Illuminated Power Meters
The Illuminated Power Output Watt Meters on the MC402 are peak responding, and indicate the true power output of the amplifier. The Peak Watt Hold Mode allows the meters to temporarily stay at the highest power output and then slowly decay. The Front Panel Meter Illumination may be switched Off at any time.
•Fiber Optic Solid State Front Panel Illumination
The Illumination of the Front Panel is accomplished by the combination of custom designed Fiber Optic Light Diffusers and Light Emitting Diodes (LEDs). This provides even Front Panel Illumination, together with the extremely long life LEDs.
•Glass Front Panel and Super Mirror Chassis Finish
The famous McIntosh Illuminated Glass Front Panel with a three dimensional look and the Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MC402 will be retained for many years.
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Dimensions
Dimensions
The following dimensions can assist in determining the best location for your MC402. There is additional information on the opposite page pertaining to installing the MC402 into cabinets.
17-1/2"
44.45cm
Front View of the MC402
16-13/16" 42.70cm
Rear View of the MC402
12-1/4"
31.12cm
18-3/4"
47.63cm
16-5/16" 41.43cm
Side View of the MC402
7/8" |
13" |
2.22cm |
33.02cm
8-13/16" 9-7/16" 22.38cm 23.97cm
8-1/4"
3/16" 20.96cm 0.48cm
15/16"
2.38cm
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