McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York MC152 3RZHU $PSOL¿HU Owner’s Manual 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.
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Thank You Customer Service Your decision to own this McIntosh MC152 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.
Cable Information, Introduction and Performance Features Connector and Cable Information Performance Features XLR Connectors Below is the Pin configuration for the XLR Balanced Input Connectors on the MC152. Refer to the diagram for connection: PIN 1: Shield/Ground PIN 2: + Input/Output PIN 3: - Input/Output PIN 2 PIN 1 3RZHU 2XWSXW The MC152 is a Power Amplifier with a capability of 150 watts per channel into 2, 4 or 8 ohm speakers with less than 0.005% distortion.
Dimensions Dimensions The following dimensions can assist in determining the best location for your MC152. Front View of the MC152 17-1/2" 44.5cm 5-3/8" 13.7cm 6" 15.2cm Side View of the MC152 18-15/16" 12-1/4" 48.1cm 31.1cm 17-3/16" 43.7cm 3/16" 0.5cm Rear View of the MC152 4-3/4" 12.1cm 17-1/8" 43.5cm BAL L BAL R UNBAL 4-9/16" 11.6cm 13/16" 2.1cm 12-5/8" 32.1cm 1-9/16" 4.0cm 3" 7.6cm 13 -1/4" 33.
Installation Installation The MC152 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 MC152 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 MC152 is removed from the custom installation and used free standing.
Rear Panel Connections and Switch BALanced L INPUT for audio cables from a Preamplifier or A/V Control Center audio output INPUT MODE switch selects between BALanced or UNBALanced Input PoWeR ConTRoL OUT sends turn On/Off signals to the next McIntosh Component PoWeR ConTRoL IN receives turn On/Off signals from a McIntosh component BALanced R INPUT for audio cables from a Preamplifier or A/V Control Center audio output AUTO OFF Power Save Feature is either DISabled or ENAbled BAL L BAL R UNBAL RIGHT
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC152 Power Amplifier Output Terminals please follow the steps below: 1. Rotate the top of the Output Terminal Post counterclockwise until an opening DSSHDUV 5HIHU WR ¿JXUHV $ DQG 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 ¿JXUH & 3.
Output Terminals and How to Connect Output Terminals. The terminals are indentified DV ȍ RKPV ȍ RKPV RU ȍ RKPV FRQQHFWLRQ to match the impedance of the Loudspeaker, being careful to observe the correct polarities. Note: The illustration on separate sheet “Mc1A” is FRQQHFWLRQV IRU ȍ RKPV /RXGVSHDNHUV If the Loudspeaker’s impedance is in-between the available connections, use the nearest lower impedance connection. Refer to “General Information” Note 3 on page 3 for additional information.
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC152 Power Amplifier Output Terminals please follow the steps below: 1. Rotate the top of the Output Terminal Post counterclockwise until an opening appears. 5HIHU WR ¿JXUHV $ DQG % 2. Insert the Loudspeaker hookup Opening cable into the Output Terminal Post opening or the cable spade Figure A Figure B lug around the center post of the Output Terminal. Refer to ¿JXUH & 3.
How to Connect for Bi-Amp 8. Referring to figure H, connect the Loudspeaker hookup cables with banana plugs into the hole at the top of the MC152 Negative and Positive Output Terminals. The terminals are LQGHQWLILHG DV ȍ RKPV ȍ RKPV RU ȍ RKPV connection to match the impedance of the Loudspeaker, being careful to observe the correct polarities. terminal cap until the cable is firmly clamped into the terminals so the lugs or wire cannot slip out. Refer to figures 7 and 8.
Front Panel Displays and Controls Standby Power On Indicator Meter indicates the Left Channel Output of the amplifier LED indicates when the LEFT Channel Amplifier POWER GUARD circuit activates METER Push-button switches Meter Illumination On and Off 12 Meter indicates the Right Channel Output of the amplifier LED indicates when the RIGHT Channel Amplifier POWER GUARD circuit activates POWER Push-button switches AC Power On and Off
How to Operate How to Operate 3RZHU 2Q 2II Momentarily press the POWER Push-button to switch the MC152 On or Off. Refer to figure 8. Note: There must be a power control connection between the MC152 and the Audio Preamplifier or A/V Control Center, in order for the remote power turn-on to function. Figure 8 $XWR 2II The MC152 incorporates a Power Save Feature to automatically switch power Off to the Power Amplifier approximately 30 minutes after there has been an absence of an audio input signal.
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 MC152 has a continuous average power output rating of 150 watts per channel and with a peak output current of 40 amperes; making this one of the most advanced amplifiers available today.
Technical Description The output signal of the amplifier circuit is coupled into the unique McIntosh MC152 Output Autoformer. It provides low distortion power transfer at frequencies from below 20Hz to well beyond 20,000Hz with optimum impedance points of two ohms, four ohms and eight ohms. The unequaled expertise of McIntosh in the design and manufacturing of autoformers is legendary in the high fidelity industry. Refer to figure 17.
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 right. 3RZHU 2XWSXW 0HWHU The McIntosh MC152 has large Output Watt Meters responding to 95% full scale to a single cycle tone burst at 2kHz.
Technical Description, con’t Block Diagram of the Power Supply POWER CONTROL BACKUP POWER SUPPLY LIGHTING CONTROL CONTROL LOGIC INRUSH CURRENT LIMITER AC Power MAIN RELAYS Figure 24 3RZHU 6XSSO\ &LUFXLWV To compliment the design of the MC152 Power Amplifier Circuitry, there is a high current high voltage power supply. Refer to figures 24 and 26. The very large Power Transfomer can supply over 6 amps of current. Refer to figure 25 (golf ball is for size comSDUVLRQ ,W LV HQFORVHG LQ WKH OHJHQGDU\
6SHFL¿FDWLRQV 6SHFL¿FDWLRQV Power Output Minimum sine wave continuous average power output per channel, with both channels operating is: 150 watts into 2 ohm load 150 watts into 4 ohm load 150 watts into 8 ohm load 2XWSXW /RDG ,PSHGDQFH 2, 4 or 8 ohms ,QWHUPRGXODWLRQ 'LVWRUWLRQ 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. Two #10 x 2-1/4 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.
MC152 stereo amplifier ■ The MC152 delivers 150 watts of power into two channels at 2, 4 or 8 ohms. ■ Our smallest current model solid state stereo amplifier, the MC152 is perfect for smaller systems where higher power output levels are not needed. ■ Ideal to use in modest sized stereo systems or in home theaters to power surround channels.
MC152 stereo amplifier Power Output: 150 Watts minimum sine wave continuous average power output per channel with both channels operating Output Load Impedance: Terminals for 8, 4 and 2 Ohms Rated Power Band: 20Hz to 20kHz Total Harmonic Distortion: 0.005% maximum harmonic distortion at any level from 250 milliwatts to rated power output Overall Dimensions (W x H x D): 17-1/2” (44.45cm) x 6” (15.24cm) (including feet) x 21” (50.8cm) (including front panel and cables) Weight: 75 lbs (34kg) net, 85 lbs (38.
HOME ELECTRONICS THREE YEAR LIMITED WARRANTY W elcome to the family of McIntosh owners. This is the Warranty for your new McIntosh Home Electronic Product (the “Product”). Your Product has been designed to give many years of trouble-free performance. Nonetheless, failures do sometimes occur even with equipment as well-built as McIntosh’s.
Scope and Duration of Warranty Parts and Occurrences that are not Covered by the Warranty Subject to the terms and conditions stated below, McIntosh Laboratory, Inc. (“McIntosh”) warrants to the original owner that this Product shall be free from defects in workmanship or materials for a term of three (3) years from the date when it was purchased from an Authorized McIntosh Dealer.