McIntosh MC-75 Service manual

McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: [phone] www.mcintoshlabs.com

MC75 60

th

Anniversary

Tube Power Amplier

Owner’s Manual

The lightning ash with arrowhead, within an equilateral
triangle, is intended to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s en­closure that may be of sufcient magnitude to constitute
a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.

WARNING - TO REDUCE RISK

OF FIRE OR ELECTRICAL

SHOCK, DO NOT EXPOSE

THIS EQUIPMENT TO RAIN OR

MOISTURE.

IMPORTANT SAFETY

INSTRUCTIONS!

PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install
in accordance with the manufacturer’s instruc­tions.

8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other appa-

ratus (including ampliers) that produce heat.

9. Do not defeat the safety purpose of the polar­ized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding type plug has two blades and a

NO USER-SERVICEABLE PARTS

INSIDE. REFER SERVICING TO

QUALIFIED PERSONNEL.

third grounding prong. The wide blade or the
third prong are provided for your safety. If

the provided plug does not t into your outlet,

consult an electrician for replacement of the
obsolete outlet.

10. Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles, and the point where they exit
from the apparatus.

11. Only use attachments/accessories specied by

the manufacturer.

12. Use only with the cart, stand, tripod, bracket,
or table specied by the manu­facturer, or sold with the appa­ratus. When a cart is used, use
caution when moving the cart/
apparatus combination to avoid
injury from tip-over.

13. Unplug this apparatus during lightning storms
or when unused for long periods of time.

14. Refer all servicing to qualied service person­nel. Servicing is required when the apparatus
has been damaged in any way, such as power-

To prevent the risk of electric

shock, do not remove cover or

back. No user-serviceable parts

inside.

supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or
has been dropped.

15. Do not expose this equipment to dripping or

splashing and ensure that no objects lled

with liquids, such as vases, are placed on the
equipment.

16. To completely disconnect this equipment from
the a.c. mains, disconnect the power supply
cord plug from the a.c. receptacle.

17. The mains plug of the power supply cord shall
remain readily operable.

18. Do not expose batteries to excessive heat such

as sunshine, re or the like.

19. Connect mains power supply cord only to a
mains socket outlet with a protective earthing
connection.

2

IMPORTANT!

INSTRUCTIONS FOR REMOVAL

OF FOAM INSERT OVER THE

VACUUM TUBES PRIOR TO

CONNECTING THE A.C. POWER

SUPPLY CORD, START ON THE

NEXT PAGE.

3

Unpacking the MC75

Caution: To prevent damage to the MC75

Tubes during shipping, there is a
special foam insert surrounding the
Tubes of the Power Amplifier.

The Foam Insert must be

removed from the MC75 be­fore connecting the AC Pow­er Supply Cord to the power
amplif ier.

Failure to do so has the po-

tential of a Fire Hazard,
resulting in damage to the
MC75 and the surrounding

user serviceable parts, including the tubes. If
repairs are needed they must be performed by
an authorized McIntosh Service Agency.

1. Orient the MC75 so the Front is facing you and
remove the Warning Sheet. Refer to figure 1.

2. Using a Philips Head #2 screw driver, remove the
Tube Cover Screw securing the Tube Cover to the
chassis on each side of the MC75. Refer to figure

2. Carefully lift up and remove the Tube Cover
from the MC75. Refer to figure 3.

3. Place the Tube Cover and the previously removed
chassis screws in a safe location, as the Tube
Cover will be reinstalled.

4. Carefully lift up and remove the Foam Insert from
the MC75 exposing the Tubes. Refer to figures 4
and 5.

5. Carefully reinstall the previously removed Tube
Cover using a Tube Cover Screw on each side of
the MC75. Refer to figures 6, 7A, 7B and 8.

Note: Only use the chassis screws supplied with the

MC75. If you can not find the chassis screws,
contact the McIntosh Parts Department for
replacements.

6. Save the Foam Insert and Warning Sheet with the
MC75 Shipping Carton for possible future use.

environment.

Follow these instructions for

removal of the packing foam
before connecting the AC
Power Supply Cord to the
MC75.

In order to remove the foam insert sur­rounding the tubes on the MC75, it is necessary
to temporarily remove the Tube Cover. After
the foam insert is removed, the Tube Cover is
re-installed and should not be removed. The
cover provides protection from the hazardous
voltages inside the MC75. The MC75 has no

4

Tube Cover

Tube Cover

Tube Cover
Screw

WARNING

TO AVOID A FIRE HAZARD, THE FOAM INSERT
OVER THE VACUUM TUBES MUST BE REMOVED
PRIOR TO CONNECTING THE A.C. MAINS POWER
SUPPLY CORD AND OPERATING THIS PRODUCT.

REFER TO PAGE 3 IN THE MC75 OWNER’S

MANUAL FOR INSTRUCTIONS.

Figure 1

Figure 2

Remove Foam
Insert located
under the Tube
Cover

Remove the
Warning Sheet

Tube Cover

Tube Cover
Screw

Unpacking the MC75 and Ventilation

Figure 3

Figure 4

Foam Insert

Figure 6

Figure 7A

Figure 8

Ventilation

Adequate ventilation extends the trouble free life
of the MC75. Always allow air to f low through the
ventilation holes on the bottom of the amplifier and a
means for the warm air to escape at the top. Refer to
figure 9.

Allow at least 12 inches (30.48cm) above the top;
4 inches (10.16cm) for the Front, Rear and Sides; and
1/2 inches (1.27cm) below the Power Amplifier so the

airf low is not obstucted.

Warm Air

Figure 5

Tube Cover
Screw

Figure 7B

Tube Cover
Screw

Cool Air

Figure 9

5

Thank You

Your decision to own this McIntosh MC75 Tube Power
Amplifier 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 many years 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
McIntosh.

Please Take A Moment

The serial number, purchase date and McIntosh Dealer
name are important to you for possible insurance
claim or future service. The spaces below have been
provided for you to record that information:

Serial Number: _______________________________

Purchase Date: _______________________________

Dealer Name: ________________________________

Technical Assistance

If at any time you have questions about your McIntosh
product, contact your McIntosh Dealer who is familiar
with your McIntosh equipment and any other brands
that may be part of your system. If you or your Dealer
wish additional help concerning a suspected problem,
you can receive technical assistance for all McIntosh
products at:

McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: [phone]
Fax: [phone]

Customer Service

If it is determined that your McIntosh product is in
need of repair, you can return it to your Dealer. You
can also return it to the McIntosh Laboratory Service
Department. For assistance on factory repair return
procedure, contact the McIntosh Service Department
at:

McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: [phone]
Fax: [phone]

Table of Contents

Safety Instructions ...................................................2-3

Unpacking the MC75 ...............................................4-5

Thank You and Please Take a Moment .......................6

Technical Assistance and Customer Service ..............6

Table of Contents ........................................................6

General Information ...................................................6

Connector Information ...............................................7

Introduction .................................................................7

Performance Features .................................................7

Dimensions .................................................................8

Left Side Panel Connections, Right Side Panel

Connections and Switch .............................................9

How to Connect ...................................................10 -11

Left Side Panel Display and Switches ......................12

How to Operate ......................................................... 13

Specifications ............................................................ 14

Packing Instruction ................................................... 15

Copyright 2009 © by McIntosh Laboratory, Inc.

General Information

1. The following Connecting Cable is available from
the McIntosh Parts Department:

Power Control Cable Part No. 170-202

Six foot, 2 conductor shielded, with two 1/8 inch
stereo mini phone plugs.

2. For additional connection information, refer to the

owner’s manual(s) for any component(s) connected

to the MC75.

3. The MC75 mutes the speaker output for approxi­mately fifteen seconds when first turned on.

4. For the best performance and safety it is important
to always match the impedance of the loudspeaker
to the Power Amplifier connections. Refer to step 5
on page 10.

Note: The impedance of a Loudspeaker actually var-

ies as the Loudspeaker reproduces different
frequencies. As a result, the nominal impedance
rating of the Loudspeaker (usually measured at
a midrange frequency) might not always agree
with the impedance of the Loudspeaker at low
frequencies where the greatest amount of power
is required. Contact the Loudspeaker Manufac­turer for additional information about the actual
impedance of the Loudspeaker before connecting

it to the McIntosh MC75.

5. When discarding the unit, comply with local rules
or regulations. Batteries should never be
thrown away or incinerated but disposed
of in accordance with the local regulations
concerning battery disposal.

6. For additional information on the MC75
and other McIntosh Products please visit
the McIntosh Web Site at www.mcintosh­labs.com.

6

General Information, Cable Information, Introduction and Performance Features

PIN 2 PIN 1

PIN 3

PIN 1

PIN 2

PIN 3

Power
Control

Ground

N/C

Connector and Cable Information

XLR Connectors

Below is the Pin configuration for the XLR Balanced
Input, Input/Output Connectors on the MC75. Refer to
the diagram for connection:
PIN 1: Shield/Ground
PIN 2: + Output
PIN 3: - Output

Power Control Connector

The MC75 Power Control Input receives an On/Off
signal from +5 to +12 volts.
The Power Control Output
will in turn provide a +12 volt
Output Signal with a current up
to 20mA. The 1/8 inch stereo
mini phone plug connects to a
McIntosh Preamplifier or A/V Control Center Power
Control Output.

Note: The Power Control Connecting Cable is available

from the McIntosh Parts Department:

Data and Power Control Cable Part No. 170-202

Six foot, shielded 2 conductor, with 1/8 inch stereo
mini phone plugs on each end.

INPUT

IN/OUT

Performance Features

• Power Output

The MC75 is a Tube Power Amplifier with a capabil­ity of 75 watts into 2, 4 or 8 ohm speakers with less
than 0.5% distortion.

• Unity Coupled Circuitry

The MC75 Power Amplifier uses the famous McIn­tosh Patented Unity Coupled Circuit which provides
low distortion, extended frequency response and cool
operating output tubes.

• Multifilar Wound Output Transformer

The MC75 Output Transformer Windings are part
of the Unity Coupled Circuitry. There are two bifilar
wound primaries, one for the cathodes and one for
the plates. The secondary winding is wound together
with the primary windings. This provides very close
primary to secondary coupling. The result is flat fre­quency response and wide power bandwidth.

• Balanced and Unbalanced Input

Balanced connections guard against induced noise and
allow long cable runs without compromising sound
qualit y.

• Gold Plated Connectors and Tube Socket Con­tacts

Gold Plated Input Jacks and Output Binding Posts
provide trouble free connections. Ceramic tube sock­ets with gold plated contacts provide protection from
atmospheric contamination. Output Tube Sockets
include Air-Pipe cooling at their bases.

• Special Power Supply

A regulated Power Supply, a very large core Power
Transformer and large capacitors ensure stable noise
free operation even though the power line varies.

• Titanium Chassis with Super Mirror Finish

The famous McIntosh Stainless Steel Chassis with
Super Mirror Gold Finish ensure the pristine beauty of
the MC75 will be retained for many years.

Introduction

Now you can take advantage of traditional McIntosh
standards of excellence in the MC75 Tube Power Am­plifier. The 75 watt power output will drive any high
quality Loudspeaker System. The MC75 reproduction
is sonically transparent and absolutely accurate. The
McIntosh Sound is “The Sound of the Music Itself.”

• Sentry Monitor Tube Protection

McIntosh Sentry Monitor Tube Protection Circuits
ensure the MC75 will have a long and trouble free
operating life.

7

Dimensions

16-1/2"

41.91cm

Front View of the MC75

Top View of the MC75

Left Side View of the MC75

Right Side View of the MC75

7

-7/8"

20.00cm

8-1/2"

21.59cm

13-5/8"

34.61cm

1-3/4"

4.45cm

1-3/4"

4.45cm

1-1/4"

3.18cm

4-1/2"

11.43cm

3-13/16"

9.68cm

8-1/2"

21.59cm

The following dimensions can assist in determining
the best location for your MC75.

Dimensions

8

Left Side Connections, Right Side Connections and Fuse Holder

OUTPUT Connections
for a 2, 4 or 8 ohm
Loudspeaker

POWER CONTROL IN receives a turn
On/Off signal from a McIntosh compo­nent
POWER CONTROL OUT sends a turn
On/Off signal to the next McIntosh
Component

UNBALANCED INPUT
for an audio cable from a
Preamplifier or A/V Con­trol Center audio output

UNBALANCED INput2 / OUT­put for an audio cable from a
Preamplifier output or to connect
an audio cable on to the next
Power Amplifier input

Connect the MC75
power cord to a live AC
outlet. Refer to the rear
panel to determine the
correct voltage

BALANCED INPUT
for an audio cable
from a Preamplifier
or A/V Control Cen­ter audio output

1

This Balanced connector may be used as an Input ONLY when connected to a

BALANCED INput1 / OUTput
for an audio cable from a Pre­amplifier output or to connect an
audio cable on to the next Power
Amplifier input

McIntosh C1000 Preamplifier. For all other connections use only as an Output.

Fuse holder, refer to information
on the side panel of your MC75
to determine the correct fuse
size and rating

2

This Unbalanced connector may be used as an Input ONLY when connected to a

McIntosh C1000 Preamplifier. For all other connections use only as an Output.

9

How to Connect

Figure 1

Figure 2 Figure 3

Figure 4 Figure 5 Figure 6

Caution: The supplied AC Power Cord should not

be connected to the Rear Panel of the
MC75 Tube Power Amplifier until after
the Loudspeaker Connections have been
made. Failure to observe this could result
in Electric Shock. For additional instruc­tion on making Loudspeaker Connections
contact your McIntosh Dealer or McIn­tosh Technical Support.

1. For Remote Power Control, connect a power control
cable from the Control Center or Preamplifier
Power Control Out to the MC75 POWER CON­TROL IN.

2. Connect a cable from the Balanced Output of a
McIntosh Preamplifier or Control Center to the
MC75 BALANCED INPUT. Place the INPUT
MODE Switch in the BALANCED Position.

Note: An optional hookup is to use an unbalanced

cable and place the INPUT MODE Switch in
the UNBALANCED Position.

When connecting Loudspeakers to the MC75 it is very
important to use cables of adequate size, so there is
little to no power loss in the cables. The size is speci­fied in Gauge Numbers or AWG (American Wire

Gauge). The smaller the Gauge number, the larger the

wire size:

Loudspeaker Cable Distance vs Wire Gauge Guide

Loudspeaker

Impedance

2 Ohms

4 Ohms

8 Ohms

25 feet

(7.62 meters)

or less

12AWG 10AWG 8AWG

14AWG 12AWG 10AWG

16AWG 14AWG 12 AWG

3. This McIntosh MC75 Tube Power Amplifier is de­signed for the connection of a single Loudspeaker
with an impedance of 2 ohms, 4 ohms or 8 ohms.

Note: The remaining Loudspeaker Terminals on the

50 feet

(15.24 meters)

or less

100 feet

(30.48 meters)

or less

Amplifier should not be connected to another
Loudspeaker.

4. Prepare the Loudspeaker Hookup Cables that
attach to the Amplifier by choosing one of the
methods below:

Bare wire cable ends:
Carefully remove sufficient insulation from the
cable ends, refer to figures 1, 2 & 3. If the cable
is stranded, carefully twist the strands together
as tightly as
possible.

Note: If

desired,
the
twisted
ends can be tinned with solder to keep the
strands together, or attach spade lug and/or
banana connector.

Spade lug or prepared wire connection:
Insert the spade lug connector or prepared sec­tion of the cable end into the terminal side ac­cess hole, and tighten the terminal cap until the
cable is firmly clamped into the terminal so the
wires cannot
slip out. Re­fer to figures
4, 5 & 6.
Banana plug connection:
Insert the banana plug into the hole at the top of

the terminal. Refer to figures A and B.

Note: Banana

Plugs are
for use
in the
United
States
and Canada only.

When making Loudspeaker Connections to the MC75

refer to the Connection Diagram on the next page.
This is an example of a typical audio system, your
system may vary from this, however the actual Loud­speaker would be connected in a similar manner.

5. Connect the Loudspeaker hookup cables from a
single Loudspeaker to the MC75 Negative Output
Terminal identified as COMmon and Positive Out-

put Terminal indentified as 2Ω (ohms), 4Ω (ohms)
or 8Ω (ohms) connection that matches the imped-

ance of the Loudspeaker, being careful to observe
the correct polarities. If the Loudspeaker’s imped­ance is in-between the available connections, use
the nearest lower impedance connection. Refer to
“General Information” Note 4 on page 6 for ad­ditional information.

WARNING: Loudspeaker terminals are hazard-

ous live and present a risk of electric
shock.

6. Connect the MC75 Power Cord to a live AC outlet.

Loudspeaker

10

Preamplifier

How to Connect

COM 2 Ω 4Ω 8Ω

Connect to
AC Outlet

11

Left Side Panel Display and Switches

INPUT SENSITIVITY
switch selects between

1.7V or 0.85V setting

INPUT MODE switch
selects between balanced
or unbalanced input

12

POWER Switch Turns
AC Power ON, or OFF/

ST BY(St andby)

Standby Power On and Sentry Monitor
Tube Protection Activation Indicator

How to Operate

Power On

To have the MC75 automatically turn On or Off when
a Preamplifier or A/V Control Center turns on or off,
place the Power Switch to OFF/STBY(Standby) posi­tion. For manual operation, place the
Power Switch to the ON position as
desired. Refer to figure 7.

Note: There must be a power

control connection between the MC75 and the
Preamplifier/A/V Control Center, in order for the
remote power turn-on to function.

Figure 7

Input Mode Switch

The Input Mode Switch, which is located
on the Left Side Panel of the MC75, al­lows you to select either the BAL (Bal-

anced) or UNBAL (Unbalanced) Input.

Refer to figure 8.

Figure 8

Input Sensitivity Switch

The Input Sensitivity Switch, which is located on
the Left Side Panel of the MC75, allows
matching the Preamplifier or A/V Control
Center output voltage capability so the
MC75 Power Amplifier can be driven to

Figure 9

full power output. Refer to figure 9.

With the MC75 is connected to most McIntosh
Preamplifiers or A/V Control Centers the correct set­ting of the Input Sensitivity Switch would be the 1.7V
position.

While listening to a recording with a wide dynamic
range, adjust the volume control on the Preamplifier or
A/V Control Center so during the loud passages of the
recording of the approximate rotational position of the
Preamplifier or A/V Control Center Volume

Control

is at the 2 O’Clock setting. If the Preamplifier or A/V
Control Center has an Electronic Volume Display,
adjust the Volume Display for an indication of 70% or
0dB.

This will help to assure the widest useful range of
volume control settings especially when listening to
music at lower levels. Refer to figure 9.

Standby/Protection Indicator

The MC75 Sentry Monitor Tube Protection Circuitry
provides protection to the Power Amplifier in the
event of an impedance mismatch1 between the MC75
and the Loudspeaker. It will also activate if there is
a short circuit at the MC75 Output Terminals (or the

Loudspeaker Terminals) or if a MC75 Power Output

Tube should fail. During normal operation the Sentry
Monitor Tube Protection Circuitry has no effect on the
performance of the Power Amplifier.

In the event a problem occurs, the MC75 Sentry
Monitor Tube Protection Circuitry will activate to
prevent potentially destructive high levels of current
from flowing in the amplifier. The Front Panel Stand­by LED will start flashing indicating the
Protection Circuitry has activated and the
AC Power to the MC75 is halted. Refer to
figure 10.

Figure 10

To reset the Sentry Monitor Tube Pro­tection Circuitry first note the position of the POWER
Switch. If the POWER Switch is set to the OFF/STBY
position, switch Off the Preamplifier or A/V Control
Center for approximately one minute and then switch
the Preamplifier or A/V Control Center On. When
the POWER Switch set to the ON position, place the
POWER Switch to the OFF/STBY for approximately
one minute, then place the POWER Switch to the ON
position.

How to Operate

1

The impedance of a Loudspeaker actually varies as the

Loudspeaker reproduces different frequencies. As a result,
the nominal impedance rating of the Loudspeaker (usually
measured at a midrange frequency) might not always agree
with the impedance of the Loudspeaker at low frequencies
where the greatest amount of power is required. Contact the
Loudspeaker Manufacturer for additional information about
the actual impedance of the Loudspeaker before connecting
it to the McIntosh MC75.

13

Specications

Power Output

Minimum sine wave continuous average power output
is:
75 watts into 2 ohm load
75 watts into 4 ohm load
75 watts into 8 ohm load

Output Load Impedance

2, 4 or 8 ohms

Rated Power Band

20Hz to 20,000Hz

Total Harmonic Distortion

0.5% maximum harmonic distortion at any power
level from 250 milliwatts to rated power, 20Hz to
20,000Hz

Frequency Response

+0, -0.5dB from 20Hz to 20,000Hz
+0, -3.0dB from 10Hz to 100,000Hz

Input Sensitivity (for rated output)

1.7 Volt or 0.85 Volt Unbalanced

3.4 Volt or 1.7 Volt Balanced

Signal To Noise Ratio (A-Weighted)

110dB below rated output

Wide Band Damping Factor

Greater than 18

Input Impedance

20,000 ohms Unbalanced
15,000 ohms Balanced

Tube Compliment

1 - 12AX7A Input and Phase Inverter
2 - 12AT7 Voltage Amplifier and Driver
2 - KT88 Power Output

Power Requirements

100V ~ 50/60Hz at 2.2 Amps
110V ~ 50/60Hz at 1.8 Amps
120V ~ 50/60Hz at 1.8 Amps
220V ~ 50/60Hz at 1.0 Amps
230V ~ 50/60Hz at 0.9 Amps
240V ~ 50/60Hz at 0.9 Amps
Standby: 0.5 watt

Note: Refer to the right side panel of the MC75 for the

correct voltage.

Overall Dimensions

Width is 17-3/4 inches (45.09cm) including Cables
Height is 8-1/2 inches (21.59cm) including feet
Depth is 8-1/2 inches (21.59cm)

Specications

Weig ht

38 pounds (17.24 kg) net, 43.5 pounds (19.73 kg) in

shipping carton

Shipping Carton Dimensions

Width is 21 inches (53.34cm)
Depth is 13-1/2 inches (34.29cm)
Height is 15-1/8 inches (38.42 cm)

Intermodulation Distortion

0.5% maximum, if the instantaneous peak power
output does not exceed twice the rated power output
for any combination of frequencies from 20Hz to
20,000Hz.

14

Packing Instructions

SHIPPING
CARTON

FOAM PAD
BOTTOM

TUBE COVER
WITH TUBE
FOAM INSERT
INSIDE TO
PROTECT THE
TUBES

POLY BAG

FOAM PAD
TOP

UNIT WITH
(4) FEET ON
BOTTOM
COVER

WARNING
SHEET

In the event it is necessary to repack the equipment
for shipment, the equipment must be packed exactly
as shown below. It is very important that the four feet
are attached to the bottom of the equipment. This will
ensure the proper equipment location on the bottom
foam pad. Failure to do this will result in shipping
damage.

To protect the tubes during shippment, the Foam
Insert removed from the MC75 needs to be re-insert­ed. Follow the unpacking instructions on pages 4-5 in
the reverse order.

Use the original shipping carton and interior parts
only if they are all in good serviceable condition. If

a shipping carton or any of the interior part(s) are

needed, please call or write Customer Service Depart­ment of McIntosh Laboratory, refer to page 3. Please
see the Part List for the correct part numbers.

Quantity Part Number Description

1 034469 Shipping carton
1 034468 Foam Pad Top
2 034474 Foam Pad Bottom
1 034471 Foam Insert (for protecting

the Tubes during shipping)

1 041122 Warning Sheet

4 400131 10-32 x 1/2 inch screw
4 163073 Feet

Packing Instructions

15

McIntosh Laboratory, Inc.

2 Chambers Street
Binghamton, NY 13903
www.mcintoshlabs.com

The continuous improvement of its products is the
policy of McIntosh Laboratory Incorporated who
reserve the right to improve design without notice.
Printed in the U.S.A.

McIntosh Part No. 04111600