Instruction/ maintenance manual of the product MC275 McIntosh
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MC275 Owner ’ s Manual McIntosh Laboratory , Inc. 2 Chambers S treet Binghamton, New Y ork 13903-2699 Phone: 607-723-3512 F AX: 607-724-0549 S tereo 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 T O RAIN OR MOISTURE.
3 Customer Service T echnical Assist ance Please T ake A Moment Thank Y ou Copyright 2004 © 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 and Performance Features Introduction Now you can take advantage of traditional McIntosh stan- dards of excellence in the MC275 Stereo Power Amplifier . T wo 75 watt output channels will drive any high quality Loudspeaker System to its ultimate performance.
5 MC275 Dimensions The following dimensions can assist in determining the best location for your MC275. There is additional informa- tion on page 7 pertaining to installing the MC275 into cabi- nets.
6 Inst allation of T ubes and T ube Cover Caution: T o prevent electrical shock make sure that the AC POWER CORD IS NOT CONNECTED T O THE MC275 when inserting or removing T ubes, as there are hazardous voltages present at the pins of the T ube Sockets.
7 Inst allation of T ubes, T ube Cover , Location and V entilation Small Signal T ubes: 1. Locate a 12AX7A T ube. 2. On the top left side of the amplifier , locate the T ube Socket that has the nomenclature V1 12AX7A next to it on the chassis. Refer to figure 4 and 5.
8 UNBALANCED INPUTS for audio cables from a preamplifier or control center audio outputs Left Side Panel Connections BALANCED INPUTS for audio cables from a preamplifier or control center audio output.
9 Connect the MC275 power cord to a live AC outlet. Refer to information on the back panel to deter- mine the correct volt- age Main Fuse holder , refer to information on the back panel of your MC275 .
10 How to Connect for Stereo How to Connect for Stereo 1. Connect cables from the Balanced Outputs of a McIn- tosh Preamplifier or Control Center to the MC275 Left and Right Balanced Inputs.
11 Jumper Cables Refer to page 13 for the correct switch settings How to Connect for Mono Parallel How to Connect for Mono Parallel 1. Connect cables from the Balanced Output of a McIn- tosh Preamplifier or Control Center to the MC275 Right Balanced Input.
12 Lef t Side Panel Controls and Switches MODE switch selects MONO (Parallel) or STEREO Modes of operation INPUTS switch se- lects between the BALanced or UNBALanced Inputs Power Switch turns all AC p.
13 Power On and Off Press the POWER switch to the ON position and sound will be heard from the Loudspeakers when the tubes have reached their operating temperature. The amount of time it takes is dependent upon the temperature of the T ubes. Press the POWER Switch to the Off posi- tion to stop amplifying the audio signal.
14 Specifications Specifications Power Output S tereo Minimum sine wave continuous average power output per channel, both channels operating is: 75 watts into 4, 8 or 16 ohm load Power Output Mono (Pa.
15 Packing Instructions Packing Instructions In the event it is necessary to repack the equipment for shipment, the equipment must be packed exactly as de- scribed and shown below . The MC275 V acuum T ubes must be removed from the Am- plifier T ube Sockets and placed into the inside open- ings of the four layer foam packing material.
McIntosh Part No. 04091201 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 MC275 (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 MC275 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 MC275 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, McIntosh MC275 you will learn all the available features of the product, as well as information on its operation. The information that you get McIntosh MC275 will certainly help you make a decision on the purchase.
If you already are a holder of McIntosh MC275, 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 MC275.
However, one of the most important roles played by the user manual is to help in solving problems with McIntosh MC275. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device McIntosh MC275 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
