Thank You
Your decision to own this McIntosh MC303 Power Ampli- fier ranks you at the very top among discriminating music listeners. You now have “The Best.” The McIntosh dedica- tion 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:
Fax:
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:
Fax:
Copyright 2008 © by McIntosh Laboratory, Inc.
Table of Contents |
|
Safety Instructions | 2 |
Thank You and Please Take a Moment | 3 |
Technical Assistance and Customer Service | 3 |
Table of Contents | 3 |
General Information | |
Connector Information | 4 |
Introduction | 4 |
Performance Features | 4 |
Dimensions | 5 |
Installation | 6 |
Rear Panel Connections and Switch | 7 |
How to Connect | |
Connection Diagrams (Separate Sheet) MC1A and MC1B | |
Front Panel Displays and Controls | 10 |
How to Operate | 11 |
Technical Description | |
Photos | |
Specifications | 18 |
Packing Instruction | 19 |
General Information
Caution: The MC303 Amplifier weight is 150 pounds (70.3 kilograms). It requires two or more persons to safely handle when moving the amplifier.
1.The following Connecting Cable is available from the McIn- tosh Parts Department:
Power Control Cable Part No.
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 MC303.
3.The MC303 mutes the speaker output for approximately two seconds when first turned on.
4.In the event the MC303 overheats, due to improper ventilation and/or high ambient temperature, the protection circuits will activate. The Front Panel Power Guard LEDs will continu- ously indicate ON and the audio will be muted. When the MC303 has returned to a safe operating temperature, normal operation will resume.
5.For the best performance it is important to minimize an im- pedance mismatch. An impedance mismatch can occur when a Loudspeaker of a given impedance rating is connected to the MC303 Output Terminals with a different impedance rating. For example, a Loudspeaker with an impedance rating of 2 Ohms is connected to the MC303 8 Ohm Output Terminals.
The impedance of a Loudspeaker actually varies as the Loudspeaker reproduces different frequencies. As a result, the nominal impedance rating of the Loudspeaker (usually mea- sured 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.
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