Related Manuals for McIntosh MC252
Summary of Contents for McIntosh MC252
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Page 1: Power Amplifier
Power Amplifier MC252 Owner’s Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549... -
Page 2: Important Safety Instructions
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... -
Page 3: Table Of Contents
5. In the event the MC252 over heats, due to improper ventilation and/or high ambient temperature, the protection circuits will activate. The Power Guard LED will stay ON and the audio will be muted. When the MC252 has returned to a safe operating temperature, normal operation will resume. -
Page 4: Connector Information
Patented Sentry Monitor with Thermal Protection Pin 1 McIntosh Sentry Monitor power output stage protection Pin 3 circuits ensure the MC252 will have a long and trouble free operating life. Built-in Thermal Protection Circuits guard against overheating. Power Control Positive... -
Page 5: Front View
Connector Information, Introduction, Performance Features and Dimensions The following dimensions can assist in determining the best location for your MC252. There is additional informa- tion on the next page pertaining to installing the MC252 into cabinets. Front View of the MC252... -
Page 6: Installation
Caution: The MC252 Amplifier weight is 94.5 pounds (42.87 kilograms). It requires two or more persons to safely handle when moving the amplifier. The MC252 can be placed upright on a table or shelf, standing on its four feet. The four feet may be removed... -
Page 7: Top Panel Connections And Switch
McIntosh component. POWER rect fuse size and CONTROL OUT sends a turn On/ rating Off Trigger to the next McIntosh component RIGHT Channel OUTPUTs connections for 2 ohm, 4 ohm and 8 ohm Loudspeakers Connect the MC252 power cord to a live AC outlet. -
Page 8: How To Connect In Stereo
Terminal Connection Covers, showing the opening on the covers for the Loudspeaker Cables to exit the MC252. It is not intended to show which terminal connections to use. 6. Connect the MC252 power cord to an active AC outlet. - Page 9 McIntosh C45 Audio Control Center To AC Outlet 4 ohm Loudspeaker MC252 Top Rear View How to Connect in Stereo 4 ohm Loudspeaker...
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Page 10: How To Connect In Mono Bridged Mode
Terminal Connection Covers, showing the opening on the covers for the Loudspeaker Cables to exit the MC252. It is not intended to show which terminal connections to use. 6. Connect the MC252 power cord to an active AC outlet. - Page 11 McIntosh C45 Audio Control Center To AC Outlet 4 ohm Loudspeaker How to Connect in Mono Bridged Mode MC252 Top Rear View Mono Bridge Hookup Connections Loudspeaker Loudspeaker Negative Impedance (-) Connection Left Output 2 S 4 S (Ohm) Positive (+ ) Connection...
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Page 12: How To Connect In Mono Bi-Amp (Parallel)
Connection Covers have been installed. Failure to observe this could result in Electric Shock. There are two different ways of operating the MC252 mon- aurally, Mono Bridged Mode and Mono Bi-Amp (Parallel) Mode. The Mono Bridge Mode allows for Loudspeakers of 4 (ohm), 8 (ohm) or 16 (ohm) impedance to be con- nected to the MC252. - Page 13 Note: The illustration in figure 9 is for the purpose of installing the Terminal Connection Covers, showing the opening on the covers for the Loudspeaker Cables to exit the MC252. It is not intended to show which terminal connections to use. 6. Connect the MC252 power cord to an active AC outlet.
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Page 14: Front Panel Displays And Controls
METER indicates the Power Output of the Left Channel Amplifier METER Switch selects the display modes of the Power Output Meter POWER GUARD LED lights when the amplifier Left Channel POWER GUARD circuit activates Front Panel Displays and Controls Remote On Indicator lights when the amplifier is in the Remote Turn-On Mode POWER GUARD LED... -
Page 15: How To Operate
How to Operate Power On To have the MC252 automatically turn On or Off when a control center turns on or off, rotate the power switch to the remote position. For manual op- eration, rotate the power switch to the On or Off position as de- sired. -
Page 16: Technical Description
McIntosh has ever manufactured. The distor- tion limits for the MC252 are no more than 0.005% at rated power output for all frequencies from 20Hz to 20,000Hz. Typical performance at mid frequencies is less than 0.002%. - Page 17 The high efficiency circuit design of the MC252 con- tributes to low operating temperatures. More than 621 square inches of heat sink area keep the MC252 operating safely with convection cooling. No fans are needed. Autoformers All solid state power amplifier output circuits work best into what is called an optimum load.
- Page 18 The different types of protection circuits incorpo- rated in the MC252 insure a long and safe operating life. The MC252 also includes the unique patented McIntosh Power Guard circuit.
- Page 19 McIntosh Preamplifier or Control Center. When you turn on your preamplifier a digital “1” (+5V) signal oper- ates the power relay in the MC252. The MC252 also has a remote Power Control Out Jack. The Power Control signal from this jack is delayed by a fraction of a second so that the turn on power surge of the next power amplifier occurs at a later time.
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Page 21: Notes
Notes... -
Page 22: Specifications
120 Volts, 50/60Hz at 6.6 amps 220 Volts, 50/60Hz at 3.3 amps 230 Volts, 50/60Hz at 3.3 amps 240 Volts, 50/60Hz at 3.3 amps Note: Refer to the rear panel of the MC252 for the correct voltage. Overall Dimensions Width is 17-1/2 inches (44.45cm) Height is 9-7/16 inches (23.97cm) including feet... -
Page 23: Packing Instruction
If a shipping carton or any of the interior part(s) are needed, please call or write Customer Service Department of McIntosh Labo- ratory. Please see the Part List for the correct part numbers. - Page 24 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. 040815...
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