McIntosh LCR80 User manual

McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: [phone] www.mcintoshlabs.com
LCR80
Loudspeaker System
Owner’s Manual

2
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 non-abrasive dry soft cloth.
7. Install in accordance with the manufacturer’s
instructions.
8. This Loudspeaker is capable of producing
extremely high sound pressure levels, even
when connected to amplifiers of moderate
power output. User caution is advised. Ear
protection is recommended when playing
at high volumes as continued exposure
to high sound pressure levels can cause
permanent hearing impairment or loss.
The use of a Sound Level Pressure Meter
will greatly aid in determining when high
volume levels are occurring.
9. Do not install near any heat sources such
as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce
heat.
10. Only use attachments/accessories specified
by the manufacturer.
11. Use only with the cart, stand, tripod, bracket,
or table specif ie d 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.
12. Refer all servicing to qualified service
personnel. Servicing is required when the
apparatus has been damaged in any way,
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.
WARNING - TO REDUCE RISK OF
FIRE OR ELECTRICAL SHOCK, DO
NOT EXPOSE THIS EQUIPMENT TO
RAIN OR MOISTURE.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
To prevent the risk of electric shock, do not remove cover or
back. No user-serviceable parts inside.
IMPORTANT SAFETY
INSTRUCTIONS!
PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.
13. Do not expose this equipment to dripping or
splashing and ensure that no objects filled
with liquids, such as vases, are placed on the
equipment.
14. WARNING: When this Loudspeaker is
connected to an amplifier that is Powered
On, the connection terminals may have
hazardous live voltages present with a risk
of electric shock.

3
1. For additional connection information, refer to the
owner’s manual(s) for any component(s) connected
to the LCR80 Loudspeaker.
2. The design of LCR80 Loudspeaker took into ac-
count the acoustic characteristics of the Front Panel
Grille and it should be attached to the Loudspeaker
for the best sonic performance.
3. If there is an obvious lack of high, mid or low
frequencies after extended periods of overdrive,
the Protection Device(s) may have activated. These
devices will automatically reset when the volume
level is greatly reduced until the output of the af-
fected Loudspeaker Driver(s) returns to normal.
4. 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.
5. For additional information on the LCR80
and other McIntosh Products please visit
the McIntosh Web Site at www.mcintoshlabs.com.
Table of Contents
Thank You
Please Take A Moment
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]
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: ________________________________
Copyright 2012 © by McIntosh Laboratory, Inc.
General Information
Your decision to own this McIntosh LCR80 Loud-
speaker System ranks you at the very top among
discriminating music listeners.. You now have “The
Best.” The McIntosh dedication to “Quality,” is as-
surance that you will receive many years of listening
enjoyment from this unit.
Please take a short time to read the information in
this manual. We want you to be as familiar as pos-
sible with all the features and functions of your new
McIntosh.
Safety Instructions..................................................... 2
Thank You and Please Take a Moment...................... 3
Technical Assistance and Customer Service ............. 3
Table of Contents and General Information ..............3
Introduction................................................................ 4
Performance Features ................................................ 5
Dimensions ................................................................ 6
Unpacking the Loudspeaker and
Installing the LCR80 with Rear Stabilizers............... 7
Installing the LCR80 on the Wall ...........................8-9
Room Acoustics and Loudspeaker Placement......... 10
How to Connect .................................................. 12-13
Specifications........................................................... 14
Packing Instruction.................................................. 15

4
McIntosh Acoustic Engineers have achieved in the
design of the LCR80 Loudspeaker System, a level
of high performance. The LCR80 provides superior
spaciousness sound reproduction with unusual sound
stage depth.
The LCR80 utilizes a three-quarter
inch Titanium Dome Tweeter and a pair
of two inch Midrange Inverted Titanium
Dome Drivers. Refer to figures A and
B. Since the audio power is distributed
among all the drivers, each driver
does not have to work as hard,
resulting in greater power handling
capability, dramatic reduction in
distortion and greater dynamic
range.
The Low Frequency Section
of the System consists of a newly
designed six inch Woofer. Refer to figure C.
The two Woofers incorporate McIntosh’s Patented
LD/HP®1Magnetic Circuit Design. Finite Element
crossover network. The type of Inductor used in each
section of the crossover network has been chosen for
high linearity, even at high power levels. This prevents
distortion of the music at any frequency. The Capaci-
tors used are the low loss (ESR) types. The Network
also utilizes self resetting high current PTC Fuses to
provide an extra measure of protection.
The enclosure is an important part of the LCR80
Loudspeaker System. The Loudspeaker’s small foot-
print allows for a variety of different placements in a
room.
Introduction
Analysis and testing resulted in a design concept
which utilizes a pair of aluminum shorting sleeves
in the magnetic circuit.
Refer to figure D. The
sleeves greatly reduce
the negative influence of
the fluctuating voice coil
field on the permanent
magnet field. This results
in lower distortion due
to more linear magnetic
flux in the voice coil gap.
Refer to
figure E.
Additional
benefits are
less volume
compres-
sion due to
improved
heat trans-
fer through
the sleeves
and a cooler
operating voice coil. Both measurements, as well as
critical listening, reveal ten times less distortion than
previous designs. A good example of this low distor-
tion is incredible smoothness and clarity in the repro-
duction of the human voice.
The Crossover Network used in the LCR80 Loud-
speaker System is designed to ensure an even frequen-
cy response over the entire audible range. The Second
Order Designed Network utilizes Capacitors and
Inductors with high current capacity. Refer to figure
F. The LCR80 uses low loss (DCR) Inductors in the
Figure A
Figure B
Figure C
Figure E
Figure D
LD/HP
Conventional
1LD/HP Pat. No 5,151,943
Figure F

5
Introduction and Performance Features
Performance Features
• Patented LD/HP®Technology
The McIntosh Low Frequency Loudspeaker Elements
feature the patented LD/HP Magnetic Circuit Design.
This design, when compared to conventional Loud-
speaker Drivers, reduces distortion significantly. It
also increases power handling and efficiency.
The rear vent through the magnetic assembly offers
improved heat dissipation. The die cast basket has an
open air area under the voice coil/spider assembly to
prevent displacement noise. The polypropylene cone
with a rubber surround has a four layer copper voice
coil and is rigid to perform as a near perfect air piston.
Altogether these advances in woofer design con-
struction and materials produce the very important
first several octaves of music, with a high degree of
accuracy and superb transient response. This per-
formance level rivals woofers twice the size of the
LCR80 woofer.
• Neodymium-Iron-Boron Alloy Magnets
The two inch Midrange Drivers and the three-quarter
inch Dome Super Tweeter all use this Alloy. The
Neodymium-Iron-Boron Alloy has the highest flux
density per unit of volume. This allows for a smaller
physical size driver and thus closer driver to driver
placement for improved dispersion.
• Low Harmonic and Intermodulation Distortion
The LCR80 Loudspeaker System is capable of repro-
ducing the full dynamic range of a symphony orches-
tra with very low audible distortion of any kind.
• High Power Handling
The Loudspeaker Elements and Crossover Compo-
nents of the LCR80 are all chosen for use with ampli-
fiers up to 300 watts, yet can be driven with a 75 watt
amplifier.
• Superior Imaging
Locating the Super Tweeter between the multiple Mid-
range drivers generates a symmetrical polar response
for superior imaging.
• Versatile Operation and Placement
The LCR80 Loudspeaker System is designed for use
in a multichannel system including the Front Channels
(Left, Center and Right) or Surround Channels (Side
and Back).
• Rotatable Dispersion Pattern
The patented Rotatable Dispersion Pattern Baffle
Board2 assures the same wide dispersion and excellent
sonic imaging whether the LCR80 is positioned Verti-
cally or Horizontally.
• Loudspeaker Protection
The LCR80’s built-in speaker protection incorporates
three automatic resetting solid-state devices in the
crossover network. One protects the tweeter, one for
the midrange drivers and one for the woofers.
• Rear Stabilizer and Wall Mounting Brackets
The two Rear Stabilizers allow changing the vertical
angle of ± 11 degrees. The On-Wall Mounting Brack-
ets supplied with the LCR80 are for vertical or hori-
zontal mounting. They allow for angled mounting of
±30 degrees.
• McIntosh Custom Binding Posts
McIntosh patented gold plated output terminals3de-
liver high current output. They accept large diameter
wire and spade lugs. Banana plugs may also be used.
• Loudspeaker Enclosure
The LCR80 Loudspeaker enclosure is constructed
with non-parallel internal sides to reduce internal
standing waves. The LCR80 is available in various
real wood veneers with a high gloss polyester finish.
2Rotatable Dispersion Pattern Baffle Board Pat. No 5,751,821 3Gold Plated Output Terminal Pat. No D649,121

6
Dimensions
The following dimensions can assist in determining
the best location for your LCR80.
Dimensions
Front View
of the
LCR80
24"
61cm
8"
20.3cm
Front View
of the
LCR80
(without Grille)
12"
30.5cm
5
-3/8
"
13.5cm
2
-5/32
"
5.48cm
4"
10.2cm
5
-7/8
"
15cm
4"
10.2cm
18
-5/8
"
47.3cm
Rear View
of the
LCR80
12"
30.5cm
5
-7/8
"
15cm
2
-3/16
"
5.6cm
4"
10.2cm
9"
22.9cm
15"
38.1cm
Location of Bracket
Mounting Holes
4"
10.2cm
20"
50.8cm
4"
10.2cm
End View
of the
LCR80
8"
20.3cm
6
-3/4
"
17.2cm
6
-1/4
"
15.9cm

7
proceed to “Installing the LCR80 using
Rear Stabilizers”.
2. The LCR80 Loudspeaker is also supplied
with On Wall Mounting Brackets and
Hardware. If the LCR80 is to be mounted
on the wall at this time, proceed to “In-
stalling the LCR80 On the Wall” on
page 8.
To protect the fine finish of the LCR80 Loudspeaker
System during the installation process, it is advisable
to prepare a suitable area. A freshly vacuumed car-
peted area covered with a soft, clean fabric, such as a
large bed linen or blanket would be suitable.
It is recommended that the Professionals at your
McIntosh Dealer, who are skilled in all aspects of
installation and operation, install the LCR80 Loud-
speaker System and any associated audio equipment.
Note: Refer to illustration on page 15 for unpacking
the loudspeaker.
1. Orient the LCR80 shipping carton with the letter-
ing on the outside of the carton oriented upward.
2. Carefully cut open the shipping carton sealing
tape and open the carton flaps.
3. Remove the Loudspeaker System with end foam
pads by lifting up on the rear of the Loudspeaker
and place it along side the shipping carton on the
prepared flat surface.
4. Remove the accessory pack.
5. Release the Loudspeaker and the box containing
the Grille from the foam pads and set them aside.
6. Close the top flaps of the shipping carton and
place the top and bottom foam pads on top of the
carton. Refer to figure 1. A for the next several
steps.
7. Carefully remove the protective fiber cover from
the Loudspeaker System so as not to mar the fin-
ish. Then remove the protective plastic film wrap
from the Loudspeaker Cabinet.
8. Place the just removed protective fiber cover on
top of the shipping carton/foam end pads.
9. Place the Loudspeaker System, with the front fac-
ing down, on top of the protective fiber cover.
Notes: 1. When the LCR80 is to be used with the
supplied Rear Stabilizers and Hardware,
ment in the room. When the de-
sired angle is achieved, tighten the
screws. Refer to figures 3 and 4.
14. The LCR80 Loudspeaker Grille is
secured to the Loudspeaker Cabinet
with magnetic fasteners. Locate
the Loudspeaker Grille and align it
with the edges of the cabinet.
Note: Retain the shipping carton, foam packing ma-
terial and fiber cover for possible future use.
15. Optionally, attach the supplied McIntosh Logo to
the Front of the LCR80 Loudspeaker Grille in the
desired location, along either enge of the grille.
16. Proceed to “Room Acoustics and Loudspeaker
Placement” on page 10.
10. Attach the two rubber bumpers into bottom side
of the LCR80 and two onto the bottom side of the
Rear Stabilizers.
11. The LCR80 is shipped with the Rear Stabilizers
set for placing the Loudspeaker in a perpendicular
position. If this is the desired position proceed to
step 14.
12. To change the postion, loosen but do not remove
the two screws securing the position of the Rear
Stabilizers to the back of the LCR80. Refer to
figure 2.
13. Move the Rear Stabilizers up or down for the
desired angle (±11 Degrees from perpendicular).
This allows the sound to be directed upwards or
downwards to accommodate the seating arrange-
Unpacking the Loudspeaker
Rear Stabilizer Vertical Adjustment Positions
ABC
Figure 4
Installing the LCR80 using Rear Stabilizers
Rear Stabilizers
End foam pads
Figure 1
Figure 2
Rear Stabilizer Screws
Rear Stabilizers
Figure 3
Rear Stabilizer
Vertical
Adjustment
Positions
A
B
C
Unpacking the Loudspeaker

8
2. If the LCR80 is to be mounted in a horizontal
position proceed to step 3. When the LCR80 is to
be mounted in a vertical position, it is important
to rotate the Midrange/Tweeter Mounting Plate to
provide the optimum sound image. This is accom-
plished by the following steps:
A. Place the LCR80 on a flat surface with the
Loudspeaker Drivers facing up.
B. Temporarily
remove the
four screws
securing the
Midrange/
Tweeter Met-
al Mounting
Plate. Refer
to figure 6B.
C. Carefully lift up the metal mount-
ing plate to clear the cabinet
opening. Rotate it 90 degrees from
the current orientation and then
reinsert it back into the cabinet.
Refer to figure 6C.
D. Secure the metal mounting plate to
the cabinet using the four previous
removed mounting screws.
3. Attach either the flush mount or angle mount
brackets to the rear of the Loudspeaker. Refer to
the chart below, along with figures 5 and 7 for the
screw location. Also, be sure to orient the bracket
as illustrated in figures 8 and 9.
Note: The Angled Bracket is only for vertical
mounting of the LCR80 Loudspeaker.
4. Determine the Loudspeaker Mounting Location
on the wall, making sure the Mounting Bracket
will be anchored to a stud located inside the wall.
Note: Use extreme caution to avoid any existing
electrical wiring, plumbing, etc., located
inside the wall.
5. Refer to figures 10 thru 15 to install the appropri-
ate Wall Bracket on the wall (orient the bracket as
illustrated) using the supplied Mounting Screws.
If the Flush Mount Bracket is used, attach the two
rubber bumpers to the rear of the Loudspeaker,
near the bottom.
Note: If the wall covering material and/or thick-
ness is different from the illustration, the
two supplied Mounting Screws need to be
replaced with screws of the appropriate type
and length.
6. Orient the Loudspeaker to line up with the Wall
Brackets and attach them together. If the angle
mount is used, install the Locking Screw to secure
the Loudspeaker at the desired angle.
7. The LCR80 Loudspeaker Grille is secured to the
Loudspeaker Cabinet with magnetic fasteners.
Locate the Loudspeaker Grille and align it with
the edges of the cabinet.
Note: Retain the shipping carton, foam packing ma-
terial and fiber cover for possible future use.
8. Optionally, attach the supplied McIntosh Logo to
the Front of the LCR80 Loudspeaker Grille in the
desired location.
9. Proceed to “Room Acoustics and Loudspeaker
Placement” on page 10.
The supplied On Wall Mounting Brackets allow for
different mounting positions of the LCR80 Loud-
speaker relative to the wall, both vertical and horizon-
tal. Two positions are flush mount, with the Loud-
speaker close to and parallel with the wall. The other
position is angle mount, which places the Loudspeaker
further away from the wall and allows for rotation of
±30 degrees. Refer to figure 5.
1. Using an appropriate tool, remove the screws
securing the Rear Stabilizers to the back of the
LCR80. Refer to figure 6A.
Note: Retain the removed screws and Rear Stabi-
lizer for possible future use.
Installing the LCR80 on the Wall
Figure 5
Loudspeaker Bracket
Locking
Screw
Wall Bracket
Horizontal Wall Mounting
Angled Hardware
Vertical and Horizontal
Wall Mounting
Flush Hardware
Wall Bracket
Loudspeaker Bracket
Wall
Mounting
Screws
Figure 6A
Stabilizer Bar Screws
Rear Stabilizers
Figure 7
Screws - H Screws - H
Screws - V Screws - V
Location R
Location L
Figure 6B
Midrange/Tweeter Metal Mounting Plate
ScrewsScrews
Figure 6C

9
Installing the LCR80 on the Wall
3-1/8”
7.9cm
16”
40.6cm
6-3/4”
17.2cm
Figure 13
16”
40.6cm
3-15/16”
7.8cm
8-3/8”
21.9cm
Figure 15
Figure 12 Figure 14
Figure 10
3-1/8”
7.9cm
Figure 11
Horizontal Mounting
with Flush Hardware
Vertical Mounting
with Flush Hardware
Vertical Mounting with
Angled Hardware
Figure 8
Figure 9

10
Room Acoustics and Loudspeaker
Placement
of the Loudspeaker of at least 30 degrees either side
from the center axis for the best performance. Refer to
figure 20.
Locating Loudspeakers for use in Home Theater
In a Home Theater application, the placement of Left,
Center and Right Front Loudspeakers can be limited
by such considerations as the size and location of the
video monitor. The locating suggestions in the “for
use in a Music System” section below can still be help-
ful as a starting place. Refer to figure 21.
Locating Loudspeakers for use in a Music System
When used in a Music System the distance between
the Loudspeakers and the listener to the Loudspeak-
ers should form an equilaterial or an acute isosceles
triangle. If the speakers are too far apart relative to the
listener, some imaging can be lost. Refer to figure 22.
Room Acoustics and Loudspeaker Placement
Loudspeaker Placement
Loudspeaker placement in a room can greatly affect
performance. The LCR80 Loudspeaker System is de-
signed for Music and Home Theater Systems. The op-
timal method for selecting speaker locations includes
the use of a real time spectrum analyzer operated by
an experienced system installer. An uncompromising
installation would take into consideration the floor,
wall and ceiling coverings, the type and placement of
furniture and can even include the architectural design
of the room and its construction materials.
Sometimes Loudspeaker placement in a room is
limited to locations with unacceptable perfomance.
McIntosh now offers a solution with several Electronic
Products offering the ability to precisely measure
and correct for room induced acoustical problems,
thus restoring proper musical balance. Contact your
McIntosh Dealer for more information about this new
exciting advance in sound reproduction technology.
If a McIntosh product with room correction is not
part of your system nor professional measurement of
your system performance been performed, listen to
the Loudspeaker. Try various locations by listening to
music containing continuous bass and find a location
where there is an over all musical balance in the sound
and the bass content does not dominate. Placement
near a wall, corner, floor, ceiling or any intersect-
ing surfaces will reinforce or diminish some bass
frequencies. The bass frequencies that are altered by
placement in a particular location is dependent on the
dimensions of the room.
The LCR80’s Smooth Frequency Response may be
altered by a large object(s) located in the sound waves
path or by locating the Loudspeaker too close to a side
wall. There should be an unobstructed area in front
Figure 20
Figure 22
Figure 21

11

12
When connecting the Loudspeaker Hookup Cables to
the LCR80 Loudspeaker Input Terminals please fol-
low the steps below:
1. Rotate the end of the Input Ter-
minal Post counterclockwise
until an opening appears. Refer
to gures A and B.
2. Insert the Loudspeaker hookup
cable into the Input Terminal
Post opening or the cable spade
lug around the center post of the
Input Terminal. Refer to gure
C.
3. Rotate the end of the Input Ter-
minal Post clockwise until it is
nger tight. Refer to gure D.
4. Place the supplied McIntosh
Wrench over the end of the
Input Terminal and rotate it one
quarter of a turn (90° ) to secure
the Loudspeaker Cable Connec-
tion. Do not over tighten. Refer
to gure E.
Caution: The AC Power Cord should not be connected to
the Amplifier until after the Loudspeaker Con-
nections have been made. Failure to observe
this could result in Electric Shock.
When connecting a LCR80 Loudspeaker to an ampli-
fier 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 (Ameri-
can Wire Gauge). The smaller the Gauge number, the
larger the wire size:
Loudspeaker Cable Distance vs Wire Gauge Guide
Loudspeaker
Impedance
25 feet
(7.62 meters)
or less
50 feet
(15.24 meters)
or less
100 feet
(30.48 meters)
or less
2 Ohms 12AWG 10AWG 8AWG
4 Ohms 14AWG 12AWG 10AWG
8 Ohms 16AWG 14AWG 12AWG
1. Prepare Loudspeaker cables by choosing one of the
methods below:
Bare wire cable ends:
Carefully remove sufficient insulation from
the cable ends, refer to figures 12, 13 & 14. If
the cable is
stranded, care-
fully twist the
strands together
as tightly as
possible.
Notes: 1. If desired, the twisted ends can be tinned
with solder to keep the strands together.
2. The prepared bare wire cable ends may be
inserted into spade lug connectors.
3. Banana plugs are for use in the United
States and Canada only.
Banana Plugs are for use in the United States and
Canada only:
2. Attach the previously prepared bare
wire cable ends into the banana plugs
and secure the connections. Refer to
figure F.
3. Rotate the top of the Output Terminal
Post clockwise until it is nger tight.
Refer to gure G. Then using the
McIntosh Wrench, rotate the top of
the Output Terminal one quarter of a
turn (90° ). Do not over tighten. Refer to gure E.
4. Referring to figure H and the illustration on the
next page, connect the
Loudspeaker hookup
cables with banana plugs
into the hole at the end
of the terminal to the
LCR80 COM (Negative [-] ) Input Terminal and 8
Ω (Positive [+] ) Input Terminal.
Note: It is important to maintain the correct polar-
ity at both ends of the Loudspeaker cables.
5. Connect the other end of the Loudspeaker cables
coming from the LCR80 COM (Negative [-] ) and
8 Ω (Positive [+] )Input Terminals to the Negative
(-) and Positive (+) 8 Ω Output Terminal on the
Power Amplifier.
6. Refer to steps 2 thru 5 to connect the additional
LCR80 Loudspeakers in a similar manner to the
Amplifier.
Spade Lug or Wire Connections:
7. Referring to the illustration on the next page,
connect the Loudspeaker hookup cables to the
LCR80 COM (Negative [-] ) Input Terminal and 8
Ω (Positive [+] ) Input Terminal. 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 terminals so the lugs or wire cannot slip out.
Refer to figures 15 and 16.
How to Connect the Loudspeaker
Figure 12 Figure 13 Figure 14
Figure A
Opening
Figure B
Figure C Figure D
Figure E
Input Terminals
Figure F Figure H
Figure G
Figure F Figure H
Figure 15 Figure 16

13
Power Amplifier
How to Connect
Note: It is important to maintain the correct po-
larity at both ends of the Loudspeaker cables.
8. Connect the other end of the Loudspeaker cables
coming from the LCR80 COM (Negative [-] ) and
8 Ω (Positive [+] )Input Terminals to the Negative
(-) and Positive (+) 8 Ω Output Terminal on the
Power Amplifier.
9. Refer to steps 7 and 8 connect any additional
LCR80 Loudspeakers in a similar manner to the
Amplifier.

14
Specifications
Specifications General Specifications
System Driver Complement
Two 6 inch Woofers (incorporating LD/HP1)
Two 2 inch Titanium Inverted Dome Midranges
One 3/4 inch Titanium Dome Tweeter
Impedance
8 ohms Nominal
Frequency Response
80Hz - 45,000Hz
Sensitivity
81 dB (2.83V/1m)
Crossover Frequencies
500Hz
4,500Hz
Recommended Power Range
75 Watts to 300 Watts
Maximum Power Handling
300 Watts
Enclosure Finish
Available in various real wood veneers with
a high gloss polyester finish
Grille Finish
Black Knit Cloth
Overall Dimensions
Height is 8 inches (20.3cm)
Width is 24 inches (61cm)
Depth is 8-3/8 inches (21.3cm) including angled wall
mounting brackets
Weight
24 pounds (10.9 kg) net
30 pounds (13.6 kg) in shipping carton
Shipping Carton Dimensions
Height is 12 inches (30.5cm)
Width is 28-1/4 inches (71.8cm)
Depth is 12-3/8 inches (31.4cm)
1LD/HP Pat. No 5,151,943

15
In the event it is necessary to repack the equipment for
shipment, the equipment must be packed exactly as
shown below. To protect the finish of the Loudspeaker
it is advisable to wrap the Loudspeaker Cabinet with a
durable plastic film. Then place wrapped Loudspeaker
into the protective fiber cover, before inserting it into
the shipping carton.
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 Depart-
ment of McIntosh Laboratory. Please see the Part List
for the correct part numbers.
Quantity Part Number Description
1 03451400 Shipping carton
2 034522SP End foam pad
1 034523SP Protective fiber cover
Packing Instructions
Packing Instructions
End
Foam
Pad
Shipping
Carton
Protective
Fiber
Cover
Grille
Carton
Loudspeaker
Grille
Protective
Poly
Cover
Accessory
Pack
End
Foam
Pad

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 Laboratory, Inc.
2 Chambers Street
Binghamton, NY 13903
www.mcintoshlabs.com
McIntosh Part No. 04129900