McIntosh MC275 Owner's Manual
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McIntosh MC275 Owner's Manual

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Download this manual See also: Service Manual, Owner's Manual
CONNECTIONS
STEREO POWER
AMPLIFIER

TABLE OF CONTENTS

Speakers-Stereo or Twin Amp
1
Speakers-Mono
1
3
3
AC Power
4
OPERATION
4
4
4
4
4
5
5
CONTRACT APPLICATION
5
SCHEMATIC DIAGRAM
5
PARTS LIST
5
5
RESISTANCE AND VOLTAGE CHART
MC275
Line Output-Stereo or Twin Amp
Line Output-Mono
Line Voltage
5
6
6
6
7
7
7
7
7
8
cover pocket
cover pocket
cover pocket
cover pocket

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Summary of Contents for McIntosh MC275

  • Page 1: Table Of Contents

    STEREO POWER MC275 AMPLIFIER TABLE OF CONTENTS Speakers—Stereo or Twin Amp GENERAL DESCRIPTION Speakers—Mono TECHNICAL DESCRIPTION Line Output—Stereo or Twin Amp Electrical Specifications Line Output—Mono Mechanical Specifications AC Power PANEL FACILITIES OPERATION Input ADJUSTMENTS Output Line Voltage Line Output Input Switch...

  • Page 3: General Description

    Mclntosh instruments is directly due to low maintenance costs. distortion performance. Careful, devoted The MC275 has on one chassis two 75 research is a way of life at Mclntosh. The watt power amplifiers. In addition to use as a world's finest amplifier is the creation of per- stereo amplifier, the flexibility of the MC275 severing, resourceful Mclntosh engineers.
  • Page 4 To greatly extend tube and component mercial breakthrough that eliminates notch life a thermistor in the MC275 limits current distortion by coupling both output tubes surges produced when the equipment is almost to perfection. In the Mclntosh trans- turned on.

  • Page 5: Electrical Specifications

    ELECTRICAL SPECIFICATIONS Power Output: (Center tap internally grounded) 300 Stereo or twin amplifier—75 watts con- ohms tinuous per channel (One side internally grounded) 34 ohms, Monophonic—150 watts continuous 75 ohms Output Voltage: Harmonic Distortion: Less than 0.5% at rated output or less, Stereo or Twin Amp: 20 cycles through 20,000 cycles.

  • Page 6: Panel Facilities

    PANEL FACILITIES Fig. 3—The end panel of the MC275 showing all input and output facilities. INPUT ation connections for 2 ohms, 4 ohms, 8 The input of the MC275 has a three posi- ohms, 16 ohms, and 32 ohms are provided.

  • Page 7: Line Voltage

    The suggested minimum space for mount- fier. The mounting flange on the other end of ing the MC275 is 20" long x 14" wide x 10" the amplifier is installed in the same way. high. Always allow for air flow either by...
  • Page 8 300 ohms. For operating at 25 volts connec- tions are made at the barrier strips. OUTPUT-MONOPHONIC When the MC275 is to operate as a 150 To feed a 25-volt line, connect one side to watt monophonic amplifier, the outputs of...

  • Page 9: Adjustments

    #7 and pin #8. AC POWER For 150 watt monophonic operation 70.7 The MC275 operates on 105 volt to 130 volts is available from the secondary of the volt, 50 to 60 cycle power. The amplifier will output transformers, isolated from ground.

  • Page 10: Guarantee

    The patented Mclntosh circuit delivers its adver- MC275 to the output voltage of the program tised specifications without any need for source. For maximum flexibility set the GAIN con- these controls and is not dependent on care- fully balanced tubes for its performance.
  • Page 12 LABORATORY, INC. 2 CHAMBERS STREET, BINGHAMTON, N. Y. Made In U.S.A. Phone-Area Code 607-723-5491 Printed in U.S.A.

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