McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York MC2152 Tube 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 Your decision to own this McIntosh MC2152 Tube 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.
IMPORTANT! INSTRUCTIONS FOR REMOVAL OF FOAM INSERT OVER THE VACUUM TUBES PRIOR TO CONNECTING THE A.C. POWER SUPPLY CORD, START ON THE NEXT PAGE.
Unpacking the MC2152 Caution: To prevent damage to the MC2152 Vacuum Tubes during shipping, there is a special foam insert surrounding the Vacuum Tubes of the Power Amplifier. The Foam Insert must be removed from the MC2152 before connecting the AC Power Supply Cord to the Power Amplifier. Failure to do so has the potential of a Fire Hazard, resulting in damage to the MC2152 and the surrounding environment.
Unpacking the MC2152 and Ventilation Ventilation Adequate ventilation extends the trouble free life of the MC2152. Always allow air to flow through the ventilation holes on the bottom of the amplifier and a means for the warm air to escape at the top. Refer to figure 9. Allow at least 19 inches (48.3cm) above the top; 6 inches (15.2cm) for the Front, Rear and Sides; allow 1/2 inch (1.3cm) below the Power Amplifier so the airflow is not obstructed.
General Information 1. For additional connection information, refer to the owner’s manual(s) for any component(s) connected to the MC2152. 2. Apply AC Power to the MC2152 and other McIntosh Component(s) only after all the system components are connected together. Failure to do so may cause a malfunction of system operations as the Microprocessor’s Circuitry inside the components is active when AC Power is applied. 3. The MC2152 includes an Auto Off Power Save Feature and the default setting is enabled.
General Information, Cable Information, Introduction and Performance Features Introduction Now you can take advantage of traditional McIntosh standards of excellence in the MC2152 Tube Power Amplifier. The 150 watt power output per channel will drive any high quality Loudspeaker System. The MC2152 reproduction is sonically transparent and absolutely accurate. The McIntosh Sound is “The Sound of the Music Itself.
Dimensions Dimensions The following dimensions can assist in determining the best location for your MC2152. Front View of the MC2152 17-1/2" 44.5cm Side View of the MC2152 9-5/16" 23.7cm 18-7/8" 10-1/4" 26.0cm 9-1/4" 47.3cm 23.0cm 3-1/8" 7.9cm Rear View of the MC2152 17-3/16" 43.7cm 6-3/16" 15.7cm RIGHT OUTPUTS 8Ω + 4Ω + 2Ω + COM - CLASS 2 WIRING COM 11-1/4" 28.6cm 16-1/16" 41.0cm 8 - 2Ω + 4Ω + 8Ω + LEFT OUTPUTS 25" 63.
Rear Panel Connections, Fuse Holder and Switches RIGHT OUTPUTS Connections for a 2, 4 or 8 ohm Loudspeaker AUTO OFF DISABLE or ENABLE the Power Saving Circuitry BALanced RIGHT INPUTS for audio cables from a Preamplifier or A/V Control Center audio output RIGHT OUTPUTS Fuse holder, refer to the nomenclature next to the fuse holder to determine the correct fuse size and rating 8Ω + 4Ω + 2Ω + COM - CLASS 2 WIRING POWER CONTROL IN receives a turn On/Off signal from a McIntosh component POWER CONTROL
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC2152 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 Operation (ohms) connection to match the impedance of the Loudspeaker, being careful to observe the correct polarities. If the Loudspeaker’s impedance is in-between the available connections, use the nearest lower impedance connection. Refer to “General Information” Note 6 on page 6 for additional information. WARNING: Loudspeaker Terminals are hazardous live and present a risk of electric shock.
Front Panel Controls and Indicators Left Channel Small Signal Vacuum Tubes Right Channel Small Signal Vacuum Tubes LED Illumination Color Operation Mode Function LED Illumination Color Operation Mode Function Amber Warm-up Audio Signal is muted Amber Warm-up Audio Signal is muted Green or Blue Normal Selected by Tube Light Control Green or Blue Normal Selected by Tube Light Control Red (Flash Illumination) Sentry Protection Circuitry is Activated Red (Flash Illumination) Sentry Prote
How to Operate How to Operate Power Control The POWER CONTROL is located on the Front Panel of the MC2152, set the Control to 2Ω + 8Ω + 4Ω + the REMOTE Position. RIGHT ReferOUTPUTS to figure 10. The MC2152 Power Amplifier will turn ON or OFF as the Preamplifier its is connected to (via the Figure 10 Power Control Connection) turns On or Off . For manual operation, place the POWER CONTROL to the ON Position as desired.
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Specifications Specifications Power Output Minimum sine wave continuous average power output per channel, both channels operating is: 150 watts into 2 ohm loads 150 watts into 4 ohm loads 150 watts into 8 ohm loads Output Load Impedance 2, 4 or 8 ohms Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz Dynamic Headroom 1.2dB Frequency Response +0, -0.5dB from 20Hz to 20,000Hz +0, -3.
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 feet are attached to the bottom of the equipment. This will ensure the proper equipment location on the bottom foam pad. Failure to do this will result in shipping damage. To protect the tubes during shippment, the Foam Insert removed from the MC2152 needs to be re-inserted.
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.
