McIntosh MAC-4200 Owners manual
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 TO PREVENT BLADE EXPOSURE.
The serial number, purchase date, and Mclntosh
Laboratory Service Contract number are important to you
for possible insurance claim or future service. Record this
information here.
Serial Number
Purchase date
Service Contract Number
Upon application, Mclntosh Laboratory provides a Service
Contract to the original purchaser. Your Mclntosh Authorized Service Agency can expedite repairs when you provide
the Service Contract with the instrument for repair.
Copyright 1986 © by Mclntosh Laboratory Inc.
Contents
INTRODUCTION
Your MAC 4200 Receiver will give you
many years of satisfactory performance.
3
If you have any questions, please contact:
INSTALLATION
HOW TO CONNECT
FRONT PANEL CONTROLS
PERFORMANCE LIMITS
PERFORMANCE CHARTS
TECHNICAL DESCRIPTION
BLOCK DIAGRAM
SPECTRAL FIDELITY
Take Advantage of 3 years
of Contract Service...
Fill in the Application NOW.
4
5, 6, 7, 8
9, 10, 11,
12, 13, 14, 15
16, 17
18, 19, 20
21, 22
23
24
CUSTOMER SERVICE
Mclntosh Laboratory Inc.
2 Chambers Street
Binghamton, New York 13903-9990
Phone: 607-723-3512
McINTOSH THREE YEAR SERVICE CONTRACT
An application for A THREE YEAR SERVICE CONTRACT is included with this manual.
The terms of the contract are:
1.
Your application
completely filled in and must be postmarked within 30
days of the date of purchase of the instrument.
2. To receive the SERVICE CONTRACT, all information on
the application must be filled in. The SERVICE CON-
TRACT will be issued when the application is com-
pletely filled in and received by Mclntosh Laboratory
Incorporated in Binghamton, New York.
3. To receive the SERVICE CONTRACT, your purchase
must be made from a Mclntosh franchised dealer.
4. The SERVICE CONTRACT is issued to you as the
original purchaser. To protect you from misrepresentation, this contract cannot be transferred to a second
owner.
5. Any Mclntosh authorized service agency will repair
Mclntosh instruments at normal service rates. To
receive service under the terms of the SERVICE CON-
TRACT, the SERVICE CONTRACT CERTIFICATE must be
presented when the instrument is taken to the service
agency.
for the
SERVICE
CONTRACT must
be 6.
Always have service
service agency. If the instrument is modified or damaged as a result of unauthorized repair, the SERVICE
CONTRACT will be cancelled. Damage by improper
use or mishandling is not covered by the SERVICE
CONTRACT.
7. Mclntosh will provide all parts, materials and labor
needed to return the measured performance of the instrument to the original performance limits. The SERVICE CONTRACT does not cover any shipping costs to
and from the authorized service agency or the factory.
8. Units in operation outside the United States and
Canada are not covered by the Mclntosh Service Contract, irrespective of the place of purchase. Nor are
units acquired outside the U.S.A. and Canada, the purchasers of which should consult with their dealer to
ascertain what, if any, service contract or warranty may
be available locally.
done
by a
Mclntosh
authorized
2
The Mclntosh MAC 4200 is a high quality, FM/AM Stereo
Receiver whose design has been governed by insistence
on high performance with long life, great flexibility and
sensitivity. The rated power output is a 75 watts per chan-
nel into 8 ohms or 100 watts per channel into 4 ohms.
You will derive the greatest enjoyment and most
satisfaction when you understand its operations and its
functions. Your time invested now will return added value
to you because then you will get the best results from
your MAC 4200.
The advanced FM/AM tuner design of the MAC 4200
displays the station frequencies digitally. The display of
frequencies in the MAC 4200 serves a double function. It
shows the input selected as well as the frequency to
which the tuner is adjusted. Stations are selected easlily
either by use of the manual tuning knob, or the scan up
or down feature on either band or by use of the preset
feathertouch-buttons in either FM or AM.
The low noise electronic input switching system uses input leads that are very short, one twentieth of the length
of other systems. This provides for reduced hum and
noise, better source to source isolation (lower crosstalk),
lower distortion and freedom from high power TV and
radar signal interference.
The precision tracking volume control allows completely
noise free performance and accuracy of the channel to
channel balance over the full range. It is a step attenuator
whose channel accuracy is within 1 dB throughout its entire rotation. Such extremely accurate matching is achieved through electronically controlled trimming of the
resistance material deposited on pairs of printed circuits.
Use does not affect performance as in ordinary volume
controls.
The loudness control is continuously variable. It
operates independently of the volume control, and its
contour is accurately modeled after the family of "Equal
Loudness" curves developed by Drs. Fletcher and Munson.
Loudness controls in ordinary equipment are usually simple, passive circuits connected to a portion of the rotation
range of the volume control. As a consequence, loudness
compensation accuracy is dependent on many variables
such as speaker efficiency, amplifier gain and differences
in input level.
A five band program equalizer permits the volume ad-
justment of five important frequency ranges. Musical
balance can be adjusted to compensate for listener
preferences or recording inaccuracies. At the detent in the
center of the rotation of each control the equalizer circuits are disconnected, completely removed from the
operating circuits.
Front panel tape recorder jacks make playback from, or
copying to, a portable recorder very convenient. The ad-
ditional tape recorder may be connected to the
MAC 4200 without disconnecting your regular system.
The MAC 4200 switching circuits allow the AC power to
the entire stereo system to be controlled from either the
turntable's power switch or the power switch on this exceptional receiver. Connected to a special power outlet is
a current sensing relay that will be energized when the
turntable is turned on or when the red power switch is
pushed on. The relay, in turn, controls the AC power to
the rest of the stereo system.
POWER GUARD dynamically permits the power amplifier circuit in the MAC 4200 to deliver full maximum
power without the music destroying sounds of hard clipping; the music you hear is protected from distortion and
your speakers are protected from damage.
Electronically regulated power supplies maintain stable
operation even during periods of low or changing AC
power line voltage.
INTRODUCTION 3
The MAC 4200 may be used on a shelf or table top in
the enclosure in which it comes or may be installed in a
custom cabinet. In any method of use provide adequate
ventilation.
The trouble-free life of any electronic instrument is
greatly extended by providing sufficient ventilation to prevent the build-up of heat that causes deterioration of
component parts. Allow enough clearance so cool air can
enter at the bottom of the receiver and be vented from
the top and rear. The feet installed on the bottom of the
receiver must be left in place when using a shelf or table
top installation. The feet raise the receiver above the
mounting surface to allow reasonable ventilation. If
temperatures increase due to restricted ventilation or
speaker mismatch, an automatic temperature sensing
device turns off the MAC 4200. The device operates
automatically at a preset temperature. The MAC 4200 will
turn on again when the temperature has returned to nor-
mal limits. This additional feature assures complete
reliability under the most extreme operating conditions.
INSTALLING THE MAC 4200
IN A CUSTOM CABINET
The MAC 4200 is installed from the front of a custom
cabinet. The space needed behind the cabinet panel is
15"(38.1cm) deep, 18-1/2" (47cm) wide, and 6" (15.2cm)
high by 17-9/16" (44.6cm) wide. The cabinet panel must
be cut out 5-1/16" (12.9cm) high. Make this cutout carefully. The receiver's front panel has a 1/8" (.32cm) overhang
on both sides and a 3/32" (.24crn) overhang on the top
and bottom, (see Fig. 1)
The weight of the receiver must rest on a shelf in the
custom cabinet with a 15" (38.1cm) x 8" (20.32cm) ventilation hole cut out. (see Fig. 2) In addition, a single 3/8"
to 1/2" (1cm to 1.3cm) diameter hole (see Fig. 2 and Fig.
3) must be drilled in the shelf. A screw inserted through
this hole secures the receiver after installation. The top of
the shelf must be flush with the bottom of the custom
panel cutout.
Fig. 1 Custom Cabinet Front Panel Cutout
Prepare the MAC 4200 for custom mounting by remov-
ing the wood sides and feet:
1. Remove 4 screws; two from each side panel and
remove the panels.
2. On the bottom of the receiver are the 4 plastic feet
held on by screws. Remove these feet. Do not attempt
to remove the 4 plastic button glides as these rest
against the shelf, (see Fig. 2 and 3) At this point the
receiver is ready to be installed.
From the front of the cabinet, thread the power cord
through the opening in the cabinet panel and slide the
MAC 4200 on to the shelf. Adjust the position to evenly
cover edges of the panel cutout. Lock the unit in place
with a screw and washer inserted through the drilled hole
in the mounting shelf (see Fig. 3). Use a 1-1/4" (3.2crn)
screw for 1/2" (1.3cm) shelf or a 1-1/2" (3.8cm) screw for
3/4" (1.9cm) shelf. Do not use longer screws since they
will contact electrical circuits which can lead to equipment failure and possible injury.
Fig. 1 Custom Cabinet Front Panel Cutout
Fig. 2 Custom Cabinet Shelf Mounting Cutout
Fig. 3 MAC 4200 Custom Mounting Profile
4 INSTALLATION
Use shielded cables to connect the signal from the
preamplifier or signal source to the power amplifier. To
minimize the possibility of hum the shielded cables
should be of parallel construction or loosely twisted
together, located away from the speaker connecting
cables and AC power cords. Be certain to use good quality shielded cables for all interconnections. Your dealer
can advise you on the kind and length of cable that will
best suit your installation.
The appropriate length and size of the loudspeaker
cable for your installation will help to preserve the high
quality of sound for which the loudspeakers have been
designed. If undersize wire is used, resistance is added to
the amplifier/loudspeakers combination which adversely
affects the performance. Added resistance reduces the
damping factor, modifies the frequency response and
reduces the power output. Your dealer's advice will serve
you best for your installation. The cables to and from the
speaker should be of parallel construction or be loosely
twisted together. The chart shows the recommended
minimum wire size for the length of wire between the
amplifier and the loudspeakers.
SPEAKER CABLE LENGTHS
AMPLIFIER TO SPEAKER
For 4 Ohm Load
Feet
15
25
40
60
100
These speaker cable lengths represent a wire resistance
equal to 5% of a speaker impedance, or 97.5% transfer of
power.
HOW TO CONNECT LOUDSPEAKERS
Rear panel push connectors are provided for three pairs
of stereo speakers. The corresponding front panel
pushbuttons turn the speaker pairs on or off.
Connect the leads from the left main (1) loudspeaker to
the
SPEAKERS
Connect the leads from the right main loudspeaker to
the
SPEAKERS
nect a second
2 and 3 push connectors in a similar manner. To maintain
frequency response, power output and damping
characteristics, each speaker requires a separate cable between the receiver and the loudspeaker.
HOW TO CONNECT A TURNTABLE
Connect the left channel cable of the turntable to the L
PH1 INPUT jack. Connect the right channel cable of the
Meters
4.6
7.6
12.2
18.3
30.48
L 1 and
R 1 and
and
Common
Common
third
pair
For 8 Ohm Load Wire
Feet
30
50
HO
120
200
push connectors.
push connectors. Con-
of
speakers
Meters
9.1
15.2
24.4
36.6
60.0
to the
SPEAKERS
Gauge
18
16
14
12
10
turntable to the R PH1 INPUT jack. Connect a second
turntable to the PH2 input jacks in the same way. Connect the turntable's ground wire to the GND terminal.
Automatically shorting phono jacks eliminate the poten-
tial for hum and crosstalk and the need for shorting plugs.
CONNECTING PROGRAM
SOURCE GROUNDS
A ground (GND) post is provided to connect the
grounds from record changers, tape decks, etc. To prevent hum pick-up, the left and right program cables and
the ground wire from that source should be wound or
loosely twisted together. Make sure the ground wire does
not make any contact to the shields of the left and right
program cables as they run between the source and the
input of the preamplifier.
HOW TO CONNECT A CD PLAYER
Connect a cable from the left channel output of a com-
pact disc player to the L CD input jack. Connect a cable
from the right channel output to the R CD input jack.
When the MAC 4200 input selector switch is turned to
CD/AU2 (compact disc player or auxilliary source) the station display area will show AU2.
HOW TO CONNECT TV AUDIO
Audio from a TV monitor or any other high level source
is connected to the AUX INPUTS. Connect a cable from
the left channel audio output of a TV monitor or other
high level source, to the L AUX INPUT jack. Connect a
cable from the right channel audio output to the R AUX
INPUT jack.
When the MAC 4200 input selector switch is turned to
the TV AU 1 position (television set or auxilliary source),
the station digital display area will show AU 1.
HOW TO CONNECT TAPE RECORDERS
TO RECORD:
Connect a cable from the MAC 4200 L TAPE 1 OUT jack
to the left high level input of a tape recorder. Connect a
cable from the R TAPE 1 OUT jack to the right high level
input of a tape recorder. Connect a second tape recorder
in the same manner to the TAPE 2 OUT jacks.
TO PLAYBACK OR MONITOR TAPE:
Connect a cable from the left channel output of a tape
recorder to the MAC 4200 L TAPE 1 IN jack. Connect a
cable from the right channel output of a tape recorder to
the R TAPE 1 IN jack. Connect a second tape recorder in
the same manner to the TAPE 2 IN jacks.
FRONT PANEL TAPE 2 RECORDER JACKS
TAPE 2 input and output connections are also available
at the TAPE 2 IN-OUT jacks on the front panel. Metal
shielded 1/4" stereo phone plugs are used. The connec-
HOW TO CONNECT 5
tions are tip: left signal; ring: right signal; sleeve: common
ground.
When a plug is inserted in the front panel TAPE 2
IN jack, the circuits to the rear panel TAPE 2 INPUTS are
disconnected. Inserting a plug in the front panel TAPE 2
OUT jack does not disconnect the rear panel TAPE 2
OUT. It is possible to record from the front panel TAPE 2
OUT jack and the rear panel TAPE 2 OUT jack at the
same time. However, it is not possible to listen (or
monitor) from both the front and rear TAPE 2 IN jacks at
the same time.
THE ELECTRONIC MEMORY BATTERY POWER SUPPLY
A very long life, rechargeable battery power supply provides the energy for the electronic memory when the
receiver is turned off. When first connected, it is wise to
assume that the batteries have not been charged. The
charge rate is dictated by the 'on' time of the receiver. To
bring the batteries to full charge, leave the receiver turned on for twenty-four continuous hours. Programmed instructions will be retained for more than six months with
the receiver turned off if the batteries are fully charged.
After the batteries are fully charged, use for approximately one hour per week, will maintain the batteries in a fully
charged state.
HOW TO CONNECT AC POWER
A polarized AC plug is used on the MAC 4200. Plug it
into a 120 volt 60 Hz wall outlet. The plug blades must
be fully inserted in the outlet to prevent shock from ex-
posed blades.
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 TO PREVENT BLADE
EXPOSURE.
Three types of AC power outlets are provided on the
back panel of the MAC 4200: 2 black, 2 green and one
red.
The black outlets are switched on or off when the
MAC 4200 is turned on or off. These are intended for CD
players, equalizers or other accessories, whose total
power requirement is 600 watts.
The red outlet is on at all times. For example, a VCR
(video cassette recorder) can be plugged into this outlet
for recording a TV program when the receiver is not turned on. Neither the red outlet nor the black outlets are
fused.
AC power to the green outlets are controlled by the
AUTOMATIC SYSTEM AC ON/OFF.
AUTOMATIC SYSTEM AC TURN ON/OFF
The POWER ON pushbutton shares AC power control,
with the AC power switch on a turntable, through a current detecting switch circuit. On the rear panel, the TURNTABLE AUTO/MANUAL switch selects the mode of operation.
When the switch is in the AUTO position and a turntable plugged into one of the green AC power outlets,
the AC power to the receiver and to the black AC power
outlets can be controlled by the turntable on/off switch.
When AC power to the turntable is turned on, power to
the receiver and the black AC power outlets is turned on.
When in the automatic mode, the system will remain on
until the turntable is turned off. The POWER ON pushbut-
ton controls the AC power when using any source other
than the turntable.
In the MANUAL position only the red POWER ON
pushbutton will turn AC power on or off. Power from the
green AC power outlets can not exceed 100 watts.
Some turntables have electronic circuits that draw current all the time. To use these turntables the
AUTO/MANUAL switch must be in the MANUAL position.
CONNECTING AN FM ANTENNA
Provisions have been made for the use of one of three
antenna systems: (1) an outdoor FM antenna, or (2) a VHFTV antenna, or (3) the indoor dipole supplied.
An outdoor antenna is recommended for optimum per-
formance in all areas. In fringe (outlaying) areas, best
results will be obtained with a highly directional FM
antenna used in conjunction with a rotator. If the antenna
uses a 300 ohm lead, connect it to the ANTENNA 300 ohm
FM push connectors.
If the antenna uses a 75 ohm coaxial cable, connect it to
the rear panel ANTENNA 75ohm type F connector.
An outside antenna system should not be located in the
vicinity of overhead power lines or other electric light or
power circuits, or where it can fall into such power lines
or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such
power lines or circuits as contact with them might be
fatal.
A VHF-TV antenna can be effective when it is designed
for both FM and TV reception. Connect the two leads
from the VHF-TV antenna to the ANTENNA 300 FM push
connectors.
CONNECTING AN INDOOR
DIPOLE ANTENNA
The flexible folded dipole antenna (300 ohm) is for use
in urban or high strength signal areas. Connect the two
leads from the dipole to the ANTENNA 300 FM push con-
nectors.
The flexibility of the twin flat wire assembly permits it to
be placed under a rug, tacked behind the stereo...or placed in any other convenient location. In some cases, it
6 HOW TO CONNECT
HOW TO CONNECT 7
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