Instruction/ maintenance manual of the product MC-252 McIntosh
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MC252 Owner ’ s Manual McIntosh Laboratory , Inc. 2 Chambers Street Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 F AX: 607-724-0549 Power Amplifier.
2 IMPOR T ANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERA TING THIS EQUIPMENT . W ARNING - T O REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
3 Customer Service T echnical Assist ance Please T ake A Moment Thank Y ou Copyright 2003 by McIntosh Laboratory , Inc. The serial number , purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service.
4 Performance Features Introduction • Power Output The MC252 consists of two separate power amplifier chan- nels, each capable of 250 watts into 2, 4 or 8 ohm speakers with less than 0.005% distortion. The two channels can be combined into a single channel with 500 watts into 1, 2, 4, 8 or 16 ohm speakers with less than 0.
5 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.
6 Inst allation 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 from the bottom of the MC252 when it is custom installed as outlined below .
7 T op Panel Connections and Switch Connect the MC252 power cord to a live AC outlet. Refer to information on the back panel to deter- mine the correct voltage BALANCED INPUTS for an audio cable from .
8 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been inst alled. Failure to observe this could result in Electric Shock.
9 How to Connect in Stereo T o AC Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 T op Rear V iew 4 ohm Loudspeaker.
10 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been inst alled. Failure to observe this could result in Electric Shock.
11 How to Connect in Mono Bridged Mode T o AC Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 T op Rear V iew M ono B r idge H ookup C onne cti ons Louds pe ak e r I mpe danc e Loudsp.
12 Caution: The supplied AC Power Cord should not be connected to the Rear Panel of the MC252 Amplifier until after the Loudspeaker Connections have been made and the supplied protective T erminal Connection Covers have been installed. Failure to observe this could result in Electric Shock.
13 How to Connect in Mono Bi-Amp (Parallel) Mode M ono B i - A m p (P ar al le l ) H o okup C onne ct ion s Loudspe ak e r I mpe danc e Loudspe ak e r Negat i v e (- ) Connect ion Loudspe ak e r P os .
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 amp.
15 How to Operate How to Operate Power On T o 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.
16 T echnical 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 cre- ated a power amplifier without compromise, using the most advanced McIntosh circuit design concepts.
17 T echnical Description rent gain over the entire current range they must cover . Output transistors in particular , have matched uniform cur- rent gain, high current-bandwidth product and large active region safe operating area. An automatic tracking bias sys- tem completely eliminates any trace of crossover distor- tion.
18 Figure 19 W ith Power Guard Figure 18 W ithout Power Guard Figure 17 Input T est Signal Figure 16 lower than optimum, causes more output current to flow , which results in extra heat being generated in the power output stage. This increase in temperature will result in a reduced life expectancy for the amplifier .
19 T echnical Description, con’t tronic attenuator at the amplifier input reduces the input volume just enough to prevent any further increase in dis- tortion. The Power Guard circuit acts so fast that there are absolutely no audible side effects and the sonic purity of the music reproduction is perfectly preserved.
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21 Notes.
22 Specifications Specifications Power Output S tereo Minimum sine wave continuous average power output per channel, all channels operating is: 250 watts into 2 ohm load 250 watts into 4 ohm load 250 .
23 Packing Instructions Packing Instructions Quantity Part Number Description 1 034256 Shipping carton only 2 034250 Foam end cap 1 034198 Inner carton top 1 034199 Inner carton bottom 1 034188 Foam p.
McIntosh Part No. 040815 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.
An important point after buying a device McIntosh MC-252 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought McIntosh MC-252 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data McIntosh MC-252 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, McIntosh MC-252 you will learn all the available features of the product, as well as information on its operation. The information that you get McIntosh MC-252 will certainly help you make a decision on the purchase.
If you already are a holder of McIntosh MC-252, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime McIntosh MC-252.
However, one of the most important roles played by the user manual is to help in solving problems with McIntosh MC-252. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device McIntosh MC-252 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
