C38 SYSTEM CONTROL CENTER
IMPORTANT SAFETY INSTRUCTIONS THESE INSTRUCTIONS ARE TO PROTECT YOU AND THE MclNTOSH INSTRUMENT. BE SURE TO FAMILIARIZE YOURSELF WITH THEM 1. 2. 3. 4. Read all instructions - Read the safety and operating instructions before operating the instrument. Retain Instructions - Retain the safety and operating instructions for future reference. Heed warnings - Adhere to warnings and operating instructions. Follow Instructions - Follow all operating and use instructions.
Your decision to own this piece of Mcintosh Stereo Equipment ranks you at the very top among discriminating music listeners. You now have "The Best". The Mcintosh dedication to "Quality", is assurance that you will receive thousands of hours of musical enjoyment from this unit. Please take a short time to read the information in this manual. We want you to be as familiar as possible with all the features and functions of your new piece of Mcintosh.
TAKE ADVANTAGE OF 3 YEARS OF CONTRACT SERVICE. . . FILL IN THE APPLICATION NOW. Your C38 System Control Center will give you many years of satisfactory performance. If you have any questions, please contact, Mcintosh Laboratory Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 MclNTOSH THREE YEAR SERVICE CONTRACT An application for A THREE YEAR SERVICE CONTRACT is included with this manual. The terms of the contract are: 1.
Mcintosh Laboratory has earned a world wide reputation for its technical contributions for improved sound reproduction. Mcintosh products incorporate an advanced level of technical innovations that have integrity proven by time. The Mcintosh "Classic" design is also recognized as the most outstanding in the industry. Mcintosh products are designed to be maximum user friendly, so anyone can enjoy using them. Another Mcintosh design policy is to provide products that are easy to maintain.
HOW TO INSTALL THE C38 The C38 can be placed upright on a table or shelf, standing on its own plastic feet. It can also be installed in an optional Mcintosh L72 equipment cabinet. Follow the mounting instructions enclosed with the L72 cabinet. The C38 can also be custom installed in a piece of furniture or cabinet of your choice. The required panel cutout and unit dimensions are shown on Page 18 of this manual. Always provide adequate ventilation for your C38, even though it develops very little heat.
F and G. LOUD (loudness) and BALANCE (concentric controls) BALANCE control, (large outer knob), adjusts the volume of the channels relative to each other. The BALANCE control affects only the MAIN, SWITCHED 1 and 2, and BALANCED (Area A) outputs. L, (Left): Turn the control to the left to accent the left channel by reducing the volume of the right channel. R, (Right): Turn the control to the right to accent the right channel by reducing the volume of the left channel.
FRONT PANEL CONTROLS, SWITCHES AND PUSHBUTTONS button again to turn the signals off. A red LED will light to indicate which outputs are turned on. If the optional SCR-3 Switching Relay is being used with the C38, the pair of speakers connected to the Speaker 1 terminals will be turned ON or OFF with the SPEAKERS 1 pushbutton. Press SPEAKERS 2 to turn on or off, the second set of outputs or speaker terminals in a similar manner.
When using a Mcintosh CD Changer, the functions are STOP, BACK TRACK, NEXT TRACK and PLAY. In the STOP position, BACK TRACK selects which disc to play, and NEXT TRACK selects the SINGLE disc. When using a compatible Tape Recorder, the functions are STOP, FAST REWIND, FAST FORWARD and PLAY. HR38 HAND HELD REMOTE CONTROLLER 6. Press HOME to operate HC-1 Home Controller functions, then within five seconds, press a pushbutton from 0 through 9 to operate the desired relays on the HC-1. 7.
THE REAR PANEL AND HOW TO MAKE CONNECTIONS 2. SWITCHED 1 and 2 OUTPUTS (Area A only) Two additional power amplifiers or accessory components can be connected to the SWITCHED 1 and 2 Outputs. Audio signals are fed to these outputs only when the appropriate front panel SPEAKERS 1 or 2 pushbuttons are pressed. This switching capability is useful when additional power amplifiers are used to feed remote area speakers.
Connect a pair of cables from the processor output jacks to the C38 RECORD PROCESSOR FROM jacks. Connect another pair of cables from the processor input jacks to the C38 RECORD PROCESSOR TO jacks. WHEN AN EXTERNAL SIGNAL PROCESSOR IS CONNECTED TO THE C38 RECORD PROCESSOR jacks, THE PROCESSOR MUST BE TURNED ON AND OPERATING, OR IN BYPASS MODE, FOR A PROGRAM TO BE FED TO THE TAPE OUTPUTS OR AREA B OUTPUTS. AUDIO INPUTS 8.
THE REAR PANEL AND HOW TO MAKE CONNECTIONS PHono: Connect a pair of cables from a record player with a moving magnet type phono cartridge to the PH inputs. 14. GND (Ground) If the phono player being used has a separate Ground lead, connect it to the GND terminal. 15. CD1 and CD2 CONTROL Connect Control cables from the C38 CD1 and CD2 CONTROL connectors to the matching connectors on a Mcintosh CD player and changer.
Both the IR sensor and the keypad connect to the C38 EXTERNAL SENSORS with a single R659/U or RG6 coaxial cable. The C38 IR power supply will allow connecting up to four IR sensors or keypads in parallel on the same coaxial line. 20. DATA PORTS Nine data output ports are provided. These allow control of compatible remote controlled accessories with their own hand held controllers transmitting directly to a C38 IR sensor.
SPECIFICATIONS TONE CONTROLS PERFORMANCE LIMITS Performance limits are the maximum Bass and Treble variable, 12dB boost to deviation from perfection permitted by a 12dB cut Mcintosh instrument. We promise you that AC POWER OUTLETS when you purchase a new C38 from a Mcintosh franchised Dealer, it will be (TOTAL CURRENT CAPACITY OF ALL FOUR OUTLETS IS 1400 WATTS) capable of performance at or better than One Unswitched these limits.
Tone Control Response Control At Minimum, Center And Maximum Loudness Control Response RESPONSE IN dB RESPONSE IN dB PERFORMANCE CHARTS FREQUENCY IN HERTZ FREQUENCY IN HERTZ Harmonic Distortion vs Frequency At Rated Output % HARMONIC DISTORTION % HARMONIC DISTORTION H a r m o n i c D i s t o r t i o n v s V o l t a g e Out T u n e r In To Main Out RMS Output Volts FREQUENCY IN HERTZ 15
TECHNICAL DESCRIPTION LOGIC DRIVEN CONTROL All Inputs, Outputs, CD, Tuner, SCR and Video selector lines are controlled by logic circuits in the C38. This logic is changed by front panel switches or by two microprocessor IR decoders, one for LISTEN/MAIN (Area A), and one for RECORD (Area B). These microprocessors are programmed with exclusive Mcintosh software.
LOUDNESS AMPLIFIER High level signals feed into the preamplifier past the input and mode switching, through the volume control and then into the loudness amplifier. The C38 uses an active loudness control circuit design. An integrated circuit operational amplifier is used with two separate feedback circuits. One feedback loop has flat frequency response, and the other loop has loudness compensation.
INSTALLATION DIAGRAM C38 CUSTOM MOUNTING 17.1/2" 444mm OUTLINE OF FRONT PANEL END CAPS ARE 5.3/8" 136.9mm 4.7/8" 123.8mm PANEL HEIGHT IS 5.5/16" 134.9mm EDGE OF CUTOUT 17 " 4 3 3 . 4mm SUPPORT SHELF -BOTTOM OF CUTOUT AND TOP OF SUPPORT SHELF MUST COINCIDE MOUNTING SURFACE ALLOW A TOTAL OF 17" (43.
The letters and numbers correspond to the paragraphs on pages 6 through 13
039901