McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York MC611 Quad Balanced Power Amplifier Owner’s Manual 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.
Important Safety Information is supplied in a separate document “Important Additional Operation Information Guide” Thank You Customer Service General Information Your decision to own this McIntosh MC611 Quad Balanced 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.
Cable Information, Introduction and Performance Features Connector and Cable Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input, Input/Output Connectors on the MC611. Refer IN OUT to the diagram for connection: PIN 1: Shield/Ground PIN 2: + Input/Output PIN 1 PIN 2 PIN 2 PIN 1 PIN 3: - Input/Output PIN 3 PIN 3 Power Control Connector The MC611 Power Control Input receives an On/Off signal from +5 to +12 volts.
Dimensions Dimensions The following dimensions can assist in determining the best location for your MC611. Front View of the MC611 17-1/2" 44.45cm 8-7/8" 22.54cm Side View of the MC611 9-7/16" 23.97cm 20-3/16" 51.27cm 17-15/16" 45.55cm Rear View of the MC611 8-3/8" 3/16" 21.27cm 0.48cm 16-13/16" 42.70cm 2-1/4" 5.71cm 11-3/4" 29.85cm 4 13" 33.02cm 2-3/16" 5.
Installation Installation The MC611 can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a piece of furniture or cabinet of your choice. The four feet may be removed from the bottom of the MC611 when it is custom installed as outlined below. The four feet together with the mounting screws should be retained for possible future use if the MC611 is removed from the custom installation and used free standing.
Rear Panel Connections and Switch POWER CONTROL IN receives turn On/Off signals from a McIntosh component UNBALanced INput for an audio cable from a Preamplifier or A/V Processor audio output BALanced OUTput for an audio cable to the next Power Amplifier Input INPUT MODE switch selects between UNBALanced or BALanced Input BALanced INput for audio cables from a Preamplifier or A/V Processor audio output AUTO OFF Mode Switch selects between ENAbled or DISabled POWER CONTROL OUT 1 and 2 send turn On/Off si
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC611 Power Amplifier Output Terminals please follow the steps below: 1. Rotate the top of the Output Terminal Post counterclockwise until an opening appears. Refer to figures A and B. 2. Insert the Loudspeaker hookup cable into the Output Terminal Opening Post opening or the cable spade Figure B Figure A lug around the center post of the Output Terminal. Refer to figure C. 3.
Output Terminals and How to Connect cover opening on the left side. Refer to figure 5. Cover Cover Opening Cover Screws Figure 5 (Inside USA and Canada) 6. Attach the previously prepared bare wire cable ends into the banana plugs and secure the connections. Refer to figure F. 7. Rotate the top of the Output Terminal Post clockwise until it is finger tight. Figure F Refer to figure G. Then using the McIntosh Wrench, rotate the top of the Output Terminal one quarter of a turn (90° ). Do not over tighten.
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC611 Power Amplifier Output Terminals please follow the steps below: 1. Rotate the top of the Output Terminal Post counterclockwise until an opening appears. Refer to figures A and B. 2. Insert the Loudspeaker hookup cable into the Output Terminal Opening Post opening or the cable spade Figure B Figure A lug around the center post of the Output Terminal. Refer to figure C. 3.
How to Connect for Bi-Amp Banana Plugs are for use in the United States and Canada only: 7. Locate the Terminal Connections Cover from the inside of the MC611 shipping carton. Insert the just prepared Loudspeaker hookup cables thru the cover opening on the right side. Refer to figure 5. Cover Cover Opening Cover Screws Figure 5 (Inside USA and Canada) 8. Attach the previously prepared bare wire cable ends into the banana plugs and secure the connections. Refer to figure F. 9.
Front Panel Displays and Controls LED indicates when the Amplifier POWER GUARD circuit activates Meter indicates the Output of the amplifier METER Switch selects the display modes of the Power Output Meter and Meter Illumination 12 Standby Power On Indicator POWER Switch Turns AC Power Off, Remote, AC Power On
How to Operate How to Operate Power On To have the MC611 automatically turn On or Off when a control center turns on or off, rotate the power switch to the Remote position. For manual operation, rotate the power switch to the On or Off position as desired. Refer to figure 8. Note: There must be a power control connection between the MC611 and the Audio Preamplifier or A/V Control Center, in order for the remote power turn-on to function. plifier.
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. Figure 13 14 The MC611 has a continuous average power output rating of 600 watts and with a peak output current of 90 amperes; making this one of the most advanced amplifiers available today.
Technical Description expertise of McIntosh in the design and manufacturing of autoformers is legendary in the high fidelity industry. The high efficiency circuit design of the MC611 contributes to low operating temperatures. More than 1400 square inches of heat sink area keep the MC611 operating safely with convection cooling. No fans are needed. Refer to figure 15.
Technical Description, con’t In the rare event of a power amplifier output circuit failure, the McIntosh Autoformer provides absolute protection from possible damage to your valuable loudspeakers. The unequaled expertise of McIntosh in the design and manufacturing of Autoformers is legendary in the high fidelity industry. McIntosh engineers know how to do it Figure 18 right. Power Output Meter The McIntosh MC611 has a large Output Watt Meter that responds 95% full scale to a single cycle tone burst at 2kHz.
Technical Description, con’t Block Diagram of the Power Supply BACKUP POWER SUPPLY LIGHTING CONTROL POWER CONTROL AUTO OFF CONTROL LOGIC POWER SWITCH LOW VOLTAGE SUPPLY Figure 26 AC Power FUSE INRUSH CURRENT LIMITER MAIN RELAYS POWER TRANSFORMER MAIN SUPPLY Figure 23 Figure 24 Power Supply Circuits To compliment the design of the MC611 Power Amplifier Circuitry, there is a high current high voltage power supply. Refer to figures 23 and 26.
Specifications Specifications Power Output Minimum sine wave continuous average power output is: 600 watts into 2 ohm load 600 watts into 4 ohm load 600 watts into 8 ohm load Output Load Impedance 2, 4 or 8 ohms Intermodulation Distortion 0.005% maximum, if the instantaneous peak power output does not exceed twice the rated power output for any combination of frequencies from 20Hz to 20,000Hz.
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 - 20x2-1/4 inch screws and washers must be used to fasten the unit securely to the bottom pad and wood 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 www.mcintoshlabs.com 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.
