McIntosh C30 Instruction Manual
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McIntosh C30 Instruction Manual

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  • Page 1 039493...
  • Page 3 VARIOUS REGULATORY AGENCIES REQUIRE THAT WE BRING THE FOLLOWING INFORMATION TO YOUR ATTENTION. PLEASE READ IT CAREFULLY. WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT USE THE (POLARIZED) PLUG ON THIS UNIT WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED...

  • Page 4: Table Of Contents

    Your C 30 Stereo Preamplifier will give you many years of pleasant and Contents satisfactory performance. If you have any questions, please contact: CUSTOMER SERVICE Mclntosh Laboratory Inc. 2 Chambers Street INTRODUCTION Binghamton, New York 13903-9990 INSTALLATION 4 & 5 Phone: 607-723-3512 HOW TO CONNECT 6, 8 &...

  • Page 5: Introduction

    Introduction independent of the volume control. Close conformi- Why the C 30 costs more but its VALUE TRIPLES ty to the Fletcher-Munson equal loudness curves other preamplifiers. can be attained regardless of the main volume con- The Mclntosh C 30 is a superb quality, high perfor- trol position.

  • Page 6: Installation 4

    Installation The trouble-free life of an electronic instrument is greatly extended by providing sufficient ventilation to prevent the build-up of high internal temperatures that cause deterioration of component parts. You should allow enough clearance so that cool air can enter at the bottom of the cabinet and be vented from the top.
  • Page 7 Then, using a drill bit slightly larger than the tip of the intermediate position latches. Press the latches your saw blade, drill one hole at each of two inward, this permits the instrument to slide into the diagonally opposite corners. The holes should bare- cabinet until its front panel is flush with the cabinet ly touch the inside edge of the penciled outline.

  • Page 8: How To Connect 6, 8

    How to Connect Rear panel input jacks are provided for a stereo turntable, PH; a stereo tuner, TUNER; a compact disc player, CD; a laser video disc player, LASER; a TV receiver, TV; a video cassette recorder, VCR; an auxiliary high level source, AUX, and two stereo tape recorders, TAPE 1 and TAPE 2.
  • Page 9 TAPE RECORDER 2 FM ANTENNA VIDEO CASSETTE RECORDER TAPE RECORDER 1 TUNER AC POWER OTHER AC SWITCHED OUTLETS FOR TV, TAPE RECORDERS, VCR, AND TUNER AC POWER LASER VIDEO DISC PLAYER CD PLAYER AC POWER TO TURNTABLE TURNTABLE CONNECTIONS FOR TURNTABLE AND HIGH LEVEL PROGRAM SOURCES...
  • Page 10 SPEAKER 1 AND 2 USING THE SCR: HOW TO CONNECT When pushbutton 1 is IN and pushbutton 2 is OUT, EXTERNAL SIGNAL PROCESSORS: There are two sets of EXTERNAL PROCESSOR the main speakers will be connected to the power amplifier via the relays in the SCR. When pushbutton jacks.
  • Page 11 HOW TO USE THE TURNTABLE AS A POWER SWITCH: If a turntable is used with the C 30, it can be used to turn your entire system on and off. The turntable must be plugged into the green AC outlet at the rear of the C 30.
  • Page 12 MAIN SPEAKERS POWER AMPLIFIER CUSTOM ENVIRONMENTAL EQUALIZER (FOR MAIN SPEAKERS) NOISE REDUCTION PROCESSORS MAIN TAPE POWER AMPLIFIERS CONNECTIONS FOR POWER AMPLIFIERS AND LOUDSPEAKERS USING MAIN SPEAKERS AND ENVIRONMENTAL EQUALIZER. ALSO SHOWN FOR REMOTE SPEAKERS USING SEPARATE POWER AMPLIFIERS AND CONNECTIONS FOR EXTER- NAL NOISE REDUCTION SIGNAL PROCESSORS.
  • Page 13 TO AC LINE REMOTE SPEAKERS (CONTROLLED BY SPEAKER 2 PUSHBUTTON) POWER AMPLIFIER MAIN SPEAKERS (CONTROLLED BY SPEAKER 1 PUSHBUTTON) CONNECTIONS FOR POWER AMPLIFIERS AND LOUDSPEAKERS USING SPEAKER CONTROL RELAY (SCR)

  • Page 14: The Front Panel Controls And How To Use Them

    The Front Panel Controls and How to Use Them EQUALIZER FREQUENCY CONTROLS: INPUT SELECTOR: Each of five EQUALIZER FREQUENCY controls The INPUT selector switch is located at the upper raises or lowers the amplitude of a band of frequen- left on the front panel. This switch selects the input cies centered on the frequency marked above the desired for normal listening.
  • Page 15 manufactured for Mclntosh Laboratory. It has 32 steps from a tape recorder plugged into the front panel with a 70dB range, plus volume off. Left and right TAPE IN and OUT jacks. When a tape recorder is channel tracking are within a fraction of 1dB. This ex- plugged into the front jacks the TAPE 2 IN jacks on treme accuracy is obtained through special elec- the rear panel are automatically disconnected.
  • Page 16 FRONT PANEL PUSHBUTTON INDICATOR LAMPS: In all cases of use of C 30 front panel pushbut- tons, the IN or ON position is indicated by a red lamp above the switch. TAPE RECORDER FRONT PANEL CONNECTION: Input and output facilities are available at the TAPE IN-OUT jacks on the front panel.

  • Page 17: Rear Panel Controls

    Rear Panel Controls AUTO MANUAL SWITCH: In the MANUAL position, the green AC outlet sup- plys normal line voltage at all times and the turn- table operation has no effect on the C 30 operation. In the AUTO position, when the turntable turns on and off, it will also cause the C 30 and the entire system to turn on and off.

  • Page 18: Performance Limits

    Performance Limits and Ratings PERFORMANCE LIMITS General Information Performance limits are the maximum deviation from perfection permitted for a Mclntosh instru- SEMICONDUCTOR COMPLEMENT 28 Bipolar Transistors ment. We promise you that when you purchase a 66 Field Effect Transistors new C 30 from a Mclntosh franchised dealer, it will 15 Integrated Circuits be capable of or can be made capable of perfor- 91 Diodes...

  • Page 19: Performance Charts 17

    Performance Charts FREQUENCY RESPONSE AUX IN TO MAIN OUT LF AND HF FILTERS 100K FREQUENCY IN HERTZ LOUDNESS CONTROL RESPONSE FOR VARIOUS CONTROL POSITIONS FREQUENCY IN HERTZ EQUALIZER FREQUENCY RESPONSE CONTROLS SET AT MAXIMUM AND MINIMUM EQUALIZER FREQUENCY RESPONSE CONTROLS SET AT MAXIMUM AND MINIMUM FREQUENCY IN HERTZ...
  • Page 20 RIAA EQUALIZATION CURVE FREQUENCY IN HERTZ HARMONIC DISTORTION AUX IN TO MAIN OUT RMS OUTPUT VOLTS...

  • Page 21: Technical Description 19

    Technical Description FULL ELECTRONIC SWITCHING: two feedback loops. One feedback loop has flat All input switching including tape, tape-to-tape response. The other feedback loop conforms to the and mode is done electronically using J-FET field ef- Fletcher-Munson equal loudness compensation. A fect analog switches.
  • Page 22 discharge. Another special feature of the on-off cir- cuit is the instantaneous return to a 2 second delay, even if the AC pushbutton is pushed off and back on very quickly. On and off switching transients are never heard from the C 30. AUTO TURN ON: A turntable plugged into the green outlet at the rear of the C 30 can control the on-off operation of...
  • Page 23 See next page for Block Diagram...

  • Page 24: Block Diagram 22

    Block Diagram C 30 STEREO...
  • Page 25 PREAMPLIFIER...
  • Page 26 MclNTOSH LABORATORY INC. 2 CHAMBERS ST., BINGHAMTON, N.Y. 13903-2699 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. 039493 BE042003...

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