Seven Channel Power Amplifier MC207 Owner’s Manual McIntosh Laboratory, Inc.
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. 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. 1. Read these instructions. 2. Keep these instructions. 3.
Thank You Table of Contents Your decision to own this McIntosh MC207 Seven Channel 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. Safety Instructions ...............
Connector Information, Introduction and Performance Features Connector Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input Connectors on the MC207. Refer to the diagram for connection: PIN 1: Shield/Ground Pin 1 Pin 2 PIN 2: + Input Pin 3 PIN 3: - Input Power Control and Trigger Connectors The MC207’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.
Dimensions Dimensions The following dimensions can assist in determining the best location for the MC207. There is additional information on the next page pertaining to installing the MC207 into cabinets. 17-1/2" 44.45cm Front View of the MC207 8-7/8" 22.54cm 9-7/16" 23.97cm 16-13/16" 42.70cm Rear View of the MC207 11-3/4" 29.85cm 18-3/4" 47.63cm 16-7/16" 41.75cm Side View of the MC207 3/16" 0.48cm 7/8" 2.22cm 12" 30.48cm 8-1/4" 20.96cm 2" 5.
Installation Installation (3.81cm) below the bottom and 1 inch (2.54cm) on each The MC207 can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a side of the amplifier, so that airflow is not obstructed. Allow 20 inches (50.8cm) depth behind the front panel. Alpiece of furniture or cabinet of your choice. The four feet low 1 inch (2.54cm) in front of the mounting panel for may be removed from the bottom of the MC207 when it is knob clearance.
Rear Panel Connections and Switch OUPUT Connections for 4 ohm or 8 ohm Loudspeaker for Channel 6 (Right Back) or Right Channel for Zone B Resettable Circuit Breaker Connect the MC207 power cord to a live AC outlet.
How to Connect for Seven Channels Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC207 Amplifier until after the Loudspeaker Connections have been made. Failure to observe this could result in Electric Shock. 1. Connect Balanced Audio Cables from the Zone A Outputs of a McIntosh A/V Control Center to the MC207 INPUTS (Channels 1-7), making sure to match up the channel identifications between both units.
How to Connect for Seven Channels Left Front Loudspeaker Center Front Loudspeaker Right Front Loudspeaker To AC Outlet Left Surround Loudspeaker Right Surround Loudspeaker Back Surround Loudspeaker Back Surround Loudspeaker 9
How to Connect for Five Channels Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC207 Amplifier until after the Loudspeaker Connections have been made. Failure to observe this could result in Electric Shock. 1. Connect Balanced Audio Cables from the Zone A Outputs of a McIntosh A/V Control Center to the MC207 INPUTS (Channels 1-4 and 7), making sure to match up the channel identifications between both units.
How to Connect for Five Channels Left Front Loudspeaker Center Front Loudspeaker Right Front Loudspeaker To AC Outlet Left Surround Loudspeaker Right Surround Loudspeaker 11
How to Connect for Two Channels (Zone B) Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC207 Amplifier until after the Loudspeaker Connections have been made. Failure to observe this could result in Electric Shock. 1. Connect Audio Cables from the Zone B Outputs of a McIntosh A/V Control Center to the MC207 INPUTS (Channels 5 and 6), making sure to match up the channel identifications between both units. 2.
How to Connect for Two Channels (Zone B) To AC Outlet Left Channel (Zone B) Right Channel (Zone B) 13
Front Panel Displays and Controls POWER OUTPUT METER indicates power output of the Left Front Channel (1) POWER OUTPUT METER indicates power output of the Center Front Channel (4) POWER GUARD LED lights when the Left Front Channel (1) POWER GUARD Circuit activates POWER GUARD LED lights when the Center Front Channel (4) POWER GUARD Circuit activates Remote On Indicator lights when the amplifier is in the Remote Turn-On Mode METER LIGHTS Switch selects the Meter Illumination On or Off 14 POWER OUTPUT
How to Operate and Read the Power Output Meters How to Operate How to Read the Power Output Meters Power On With the POWER Switch set to the REMOTE Position, the MC207 will turn On or Off when an A/V Control Center turns On or Off. For manual operation, rotate the POWER Switch to the ON or OFF Position as desired. Refer to figure 8.
Technical Description McIntosh Laboratory, the company who introduced the world’s first amplifier that could be called “High Fidelity”, has done it again. The McIntosh engineering staff has created a power amplifier without compromise, using the most advanced McIntosh circuit design concepts. A continuous average power output rating of 200 watts and an output current of greater than 25 amperes per channel, makes this one of the most advanced and powerful amplifiers McIntosh has ever manufactured.
Technical Description Block Diagram of the Amplifiers and Meter Circuitry (One of Seven Channels Illustrated) Figure 13 higher distortion of many non-feedback designs. All transistors are selected to have nearly constant current gain over the entire current range they must cover. Output transistors in particular, have matched uniform current gain, high current-bandwidth product and large active region safe operating area.
Figure 15 The MC207 can easily drive 4 ohm speakers, with their high current demand. Additionally, the MC207 can be used with 8 ohm speakers, and deliver equal power. McIntosh’s new DPMTM design enables it to run on higher voltage rails when connected to less current-hungry 8 ohm speakers and still deliver 200 watts. The power penalty usually paid with 8 ohm speakers on high current amplifiers does not exist with this new design.
Technical Description, con’t With Power Guard but the inaudible ultrasonic distortion is also undesirable, since it can damage valuable Loudspeaker System tweeters. You will never experience the harsh and damaging distortion due to clipping. The Power Guard circuit is Figure 20 a waveform comparator, monitoring both the input and output waveforms. Under normal operating conditions, there are no differences between the shape of these waveforms.
Figure 23 Control Center. When the A/V Control Center is switched On a digital “1” (+5V) signal operates the power relay in the MC207. The MC207 also has a remote Power Control input for Zone B operation (two of the seven channels).
Notes 21
Specifications Specifications Power Output Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into a 4 ohm or 8 ohm load Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.005% for 4 or 8 ohm loads Power Requirements 100 Volts, 50/60Hz at 14.4 amps 110 Volts, 50/60Hz at 13.0 amps 120 Volts, 50/60Hz at 12.0 amps 220 Volts, 50/60Hz at 6.
Packing Instructions Packing Instructions In the event it is necessary to repack the equipment for shipment, the equipment must be packed exactly as shown below. It is very important that the four plastic feet are attached to the bottom of the equipment. Four 1/4 - 20 x 2-1/ 2 inch screws and washers must be used to fasten the unit securely to the bottom pad and shipping skid. This will ensure the proper equipment location on the bottom pad. Failure to do this will result in shipping damage.
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice. Printed in the U.S.A. McIntosh Part No.