McIntosh C27 Owner's Manual

McIntosh C27 Owner's Manual

Solid state stereo preamplifier
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THE McINTOSH C27 SOLID STATE STEREO PREAMPLIFIER
Price: $2-00
Reading Time: 28 Minutes

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Summary of Contents for McIntosh C27

  • Page 1: Service Contract

    THE McINTOSH C27 SOLID STATE STEREO PREAMPLIFIER Price: $2-00 Reading Time: 28 Minutes...
  • Page 2: Introduction

    WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The Mclntosh you have purchased has a serial number located on the rear panel of the chassis. Record that serial number here for future references. The model and serial number are important to you for any future service.
  • Page 3: Table Of Contents

    Your C 27 Stereo Preamplifier will give you many years of pleasant and satisfactory Contents performance. If you have any questions, please contact: SERVICE CONTRACT ..1 CUSTOMER SERVICE INTRODUCTION ..2 Mclntosh Laboratory Inc. HOW TO INSTALL .
  • Page 4: How To Connect

    How to Connect CONNECTING A TURNTABLE TO PHONO 1 CONNECTING A STEREO TUNER Connect the cable from the "left" channel of the turn- Connect the cable from the "left" channel tuner output table into the L PHONO 1 INPUT jack. to the L TUNER INPUT jack.
  • Page 5 FM ANTENNA TUNER TURNTABLE #1 TURNTABLE #2 AC POWER TO TURNTABLES AC POWER TO TUNERS, TAPE RECORDERS AND POWER AMPLIFIERS TAPE TAPE RECORDER RECORDER CONNECTIONS FOR TUNERS, TURNTABLES, AND TAPE RECORDERS...
  • Page 6 POWER AMPLIFIER LOUDSPEAKER ENVIRONMENTAL EQUALIZER SPEAKER SYSTEM #1 S P E A K E R SYSTEM #2 CONNECTIONS FOR POWER AMPLIFIER AND LOUDSPEAKERS...
  • Page 7 Connect a wire from the proper impedance output CONNECTING THE C 27 TO POWER AMPLIFIERS connection on the power amplifier to the FROM AMPLIFIER Connect the MAIN OUTPUT jacks to the input of a push connectors on the C 27 rear panel. Connect the first stereo power amplifier.
  • Page 8: What The Front Panel Controls

    What the Front Panel controls Do and How to use Them INPUT SELECTOR speakers. Stereo Rev: Connects the left input to the right The INPUT SELECTOR is a five position switch that loudspeaker and the right input to the left loudspeaker. connects the chosen input program to the proper circuits Stereo: Connects the left input to the left loudspeaker in the C 27.
  • Page 9 will turn main or remote loudspeakers on or off when a Right: Has the same effect on the sound from the right power amplifier has been properly connected to the C 27 loudspeaker. rear panel. TREBLE Concentric, 11 position, tone control switches adjust FILTER OPERATION the treble.
  • Page 10 by reducing the right channel output and turning the con- TAPE 2 MONITOR trol to the right accents the right channel by reducing the A second tape recorder can be operated in the same left channel output. manner using pushbutton TAPE 2 MONITOR. PANLOC Use the front panel pushbutton TAPE 2 to playback from a tape recorder plugged into the rear panel TAPE 2 INPUT...
  • Page 11: Balancing Your Stereo

    Balancing your Stereo The performance and enjoyment of a stereo system is speakers. If there is a difference in loudness turn the greatly increased when the sound is properly balanced. BALANCE control to adjust for equal loudness. The balance of the stereo system is affected by many Clockwise rotation balances for lack of loudness on the things including room acoustics, furniture placement, room right—conterclockwise balances for lack of loudness on...
  • Page 12: Performance Limits And Ratings

    Performance Limits and Ratings PERFORMANCE LIMITS are the maximum deviation from MOUNTING: Exclusive Mclntosh developed professional perfection permitted for a Mclntosh instrument. We promise PANLOC. you that your C 27 must be capable of performance at or WEIGHT: 20 pounds (9.1 kg) net, 32 pounds (14.5 kg) in exceeding these limits or you get your money back.
  • Page 14: Technical Description

    Technical Description The accompanying BLOCK DIAGRAM indicates the a 32-step control with a 70 dB range, plus volume off. various signal paths within the C 27. Circuits represented Left and right channel tracking are within 1 dB. This ex- by each block are discussed below. treme accuracy is obtained through special electronically controlled resistance element trimming.
  • Page 16 works. Separate BASS and TREBLE controls route the feedback signal to shape the frequency response by varying the amount of feedback used at different frequencies. Accurate control is accomplished by using precision capa- citors and resistors. The output of this amplifier is fed to the MAIN OUTPUT jacks.
  • Page 18 MclNTOSH LABORATORY INC. 2 CHAMBERS ST. BINGHAMTON, N. Y. 13903 607-723-3512 The continuous improvement of its products is the policy of Mclntosh Laboratory Incorporated, who reserve the right to improve design without notice. Printed in U.S A. 339091...

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