McIntosh C-504 Owners manual
THE MclNTOSH C 504 STEREO PREAMPLIFIER
Reading Time: 30 Minutes Price: $2.00
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.
The Mcintosh you have purchased is a Model
C 504. It has a serial number located on the rear panel
of the chassis. Record that serial number here:
Serial Number
The model, serial number and purchase date are
important to you for any future service. Record the
purchase date here:
Purchase date
Upon application, Mcintosh Laboratory provides a
Three-Year Service Contract. Your Mcintosh authoriz-
ed Service Agency can expedite repairs when you pro-
vide the Service Contract with the instrument for re-
pair. To assist, record your Service Contract number
here:
Service Contract Number
Your C 504 Stereo Preamplifier
will give you many years of pleasant and
satisfactory performance. If you
have any questions, please contact:
CUSTOMER SERVICE
Mcintosh Laboratory Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3512
Take Advantage of 3 years
of Contract Service-
Fill in the Application NOW.
Contents
INSTALLATION 2, 3
HOW TO CONNECT AND
BACK PANEL INFORMATION 4
FRONT PANEL INFORMATION
AND USE OF CONTROLS 6, 7
PERFORMANCE LIMITS 8
PERFORMANCE CHARTS 9
TECHNICAL DESCRIPTION 10
BLOCK DIAGRAM 12, 13
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 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.
2. Any Mcintosh authorized service agency
will repair Mcintosh insturments at nor-
mal service rates. To receive service
under the terms of the SERVICE CONTRACT, the SERVICE CONTRACT CERTIFICATE must be presented when the
instrument is taken to the service agency.
3. Always have service done by a
Mcintosh authorized 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 mishan-
dling is not covered by the SERVICE
CONTRACT.
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. To receive the SERVICE CONTRACT,
your purchase must be made from a
Mcintosh franchised dealer.
6. Your completely filled in application for
the SERVICE CONTRACT must be
postmarked within 30 days of the date
of purchase of the instrument.
7. To receive the SERVICE CONTRACT, all
information on the application must be
filled in. The SERVICE CONTRACT will
be issued when the completely filled in
application is received by Mcintosh
Laboratory Incorporated in Binghamton,
New York.
Copyright 1980 by Mcintosh Laboratory Inc.
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mended minimum space for installation is 15 inches
(38.1 cm) deep, 17 inches (43.2 cm) wide, and 4 ½ inches (11.4 cm) high.
To install the instrument in a Mcintosh cabinet,
follow the instructions that are enclosed with the
cabinet. For any other type of installation follow
these instructions:
1. Open the carton and remove the PANLOC
brackets, hardware package, and mounting template
from the carton. Remove the C 504 from its plastic
bag and place it upside down on the shipping pallet;
unscrew the four plastic feet from the bottom of the
chassis.
2. Mark the cabinet panel.
Place the mounting template in the position on the
cabinet panel where the instrument is to be installed,
and tape it in place. The broken lines that represent
the outline of the rectangular cutout also represent
the outside dimensions of the chassis. Make sure
these lines clear shelves, partitions, or any equipment. With the template in place, first mark the six A
and B holes and the four small holes that locate the
corners of the cutout. Then, join the four corner markings with pencil lines, using the edge of the template
as a straightedge.
The PANLOC system of installing equipment conveniently and securely is a product of Mcintosh
research. By depressing the two PANLOC buttons on
the front panel, the instrument can be locked firmly in
place or it can be unlocked so that the chassis can
slide forward, giving you easy access to the top and
rear panels.
The trouble-free life of an electronic instrument is
greatly extended by providing sufficient ventilation to
prevent the buildup of high internal temperatures that
cause deterioration. Allow enough clearance so that
cool air can enter at the bottom of the cabinet and be
vented from the top. With adequate ventilation the instrument can be mounted in any position. The recom-
3. Drill Holes.
Use a drill with a 3/16 inch bit held perpendicular to
the panel and drill the six A and B holes. Then, using a
drill bit slightly wider than the tip of your saw blade,
drill one hole at each of two diagonally opposite corners. The holes should barely touch the inside edge of
the penciled outline. Before taking the next step, make
sure that the six A and B holes have been drilled.
4. Saw the Panel Cutout.
Saw carefully on the inside of the penciled lines. First
make the two long cuts and then the two short cuts.
After the rectangular opening has been cut out, use a
file to square the corners and smooth any ir-
regularities in the cut edges.
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5. Install the Mounting Strips.
In the hardware package you will find two mounting
strips, four 6-32 x 1-1/4 inch fillister head screws and
two 4-40 x 1-1/4 inch flat head screws. These are long
enough for any cabinet panel thickness up to one
inch.
Starting at the right-hand side of the panel, insert a
4-40 x 1-1/4 inch flat head screw into the center hole in
the panel, marked B on the template. On the back of
the panel, align a mounting strip with the holes in the
panel and tighten the screw until the screwhead is
pulled slightly into the wood.
Repeat this procedure to attach the mounting strip
to the left side of the panel.
6. Attach the PANLOC Brackets.
Using two of the 6-32 x 1-1/4 inch fillister head screws
in the A holes on each side, attach the PANLOC
brackets to the cabinet panel; the short flange is
mounted against the front (face) of the cabinet panel.
The screws pass through the PANLOC bracket flange,
the cabinet panel, and then through the mounting
strips previously mounted.
7. Install the Instrument.
Guide the AC power cord through the panel opening
to the back of the cabinet; then, slide the instrument
into the opening carefully so that the rails on the bot-
tom of each side of the chassis engage the tracks on
the mounting brackets. Continue to slide the instru-
ment into the cabinet until it is stopped by the adjust
position latches. Press the latches inward, this permits the instrument to slide into the cabinet until its
front panel is flush with the cabinet panel. Depress
the PANLOC buttons at the lower left and right cor-
ners of the instrument panel to lock the unit firmly in
the cabinet. Depressing the PANLOC buttons again
will unlock the instrument so that it can slide forward
to the adjust position; if you press inward on the ad-
just position latches then you can remove the instru-
ment from the cabinet.
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