McIntosh XRT30 User Manual
XRT30
Loudspeaker
System
Owner’s Manual
XRT30
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549
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.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
General:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Warning: To reduce risk of fire or electrical shock,
do not expose this equipment to rain or moisture.
This unit is capable of producing high sound pressure levels. Continued exposure to high sound pressure levels can cause permanent hearing impairment or loss. User caution is advised and ear protection is recommended when playing at high volumes.
6. Only use attachments/accessories specified by the
manufacturer.
Installation:
7. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other equipment (including
amplifiers) that produce heat.
9. Do not use this equipment near water.
10. 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.
11. Use only with the cart, stand, tripod,
bracket, or table specified by the manufacturer, or sold with the equipment. When a
cart is used, use caution when moving the
cart/equipment combination to avoid injury from tip-over.
Care of Equipment:
12. Clean only with a dry cloth.
13. Do not permit objects or liquids of any kind to be
pushed, spilled and/or fall into the equipment through
enclosure openings.
Repair of Equipment:
14. Refer all servicing to qualified service personnel. Servicing is required when the equipment has been damaged in any way, liquid has been spilled or objects have
fallen into the equipment, the equipment has been exposed to rain or moisture, does not operate normally, or
has been dropped.
15. Do not attempt to service beyond that described in the
operating instructions. All other service should be referred to qualified service personnel.
16. When replacement parts are required, be sure the service technician has used replacement parts specified by
McIntosh or have the same characteristics as the original part. Unauthorized substitutions may result in fire,
electric shock, or other hazards.
17. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks
to determine that the product is in proper operating
condition.
2
Thank You
Table of Contents
Your decision to own this McIntosh XRT30 Loudspeaker
System 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: 607-723-1545
Fax: 607-723-3636
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: 607-723-3515
Fax: 607-723-1917
Copyright 2002 by McIntosh Laboratory, Inc.
Safety Instructions ............................................................. 2
Thank You and Please Take a Moment ............................. 3
Technical Assistance and Customer Service ..................... 3
Table of Contents and Important Information ................... 3
Introduction ....................................................................... 4
Performance Features ........................................................ 5
Dimensions ........................................................................ 6
Installation ....................................................................... 10
How to Connect using a single amplifier ........................ 12
How to Connect using two amplifiers............................. 14
How to Connect using three amplifiers........................... 16
Specifications .................................................................. 18
Packing Instruction .......................................................... 19
Important Information
Caution: The XRT30 Bass Section Cabinet weight is 192
pounds (87.1kg) and the High Frequency Column
weight is 82 pounds (37.20kg) net. It requires two or
more persons to safely handle each section.
1. It is very important that Loudspeaker Cables of adequate size
be used, to ensure that there will be no power loss or heating.
Cable size is specified in Gauge numbers or AWG (American
Wire Gauge). The smaller the Gauge number, the larger the
wire size:
If the Loudspeaker Cables are 25 feet (7.62m) or less, use at
least 18 Gauge (AWG) wire size or larger.
If the Loudspeaker Cables are 50 feet (38.1m) or less, use at
least 14 Gauge (AWG) wire size or larger.
If the Loudspeaker Cables are 100 feet (76.2m) or less, use at
least 12 Gauge (AWG) wire size or larger.
The Loudspeaker Connection Terminals can accept up to 12
Gauge (AWG) wire.
2. For additional connection information, refer to the owner’s
manual(s) for any component(s) connected to the XRT30
Loudspeaker.
3. The XRT30 has built-in speaker protection in the form of six
automatic resetting solid-state devices as part of the
crossover networks. Two protect the tweeters, one for the
midranges and three for the woofers. The characteristics of
this protection are that a certain amount of overdrive is
allowed but extended periods of overdrive will trigger
protection. If an obvious lack of high, mid or low frequencies
is noticed, the Loudspeaker Protection Device may have
activated. The protection devices will automatically reset
when the volume control is reduced significantly and kept low
until the output of the affected Loudspeaker Element returns
to normal.
4. When the XRT30 Loudspeaker System is driven by more than
one amplifier, the output levels of the different amplifiers
connected to the Loudspeaker System must be adjusted to
achieve a proper balance between the low, midrange and high
frequencies reproduced. This adjustment is best achieved
through the use of audio test equipment operated by a
qualified installer.
3
Introduction
McIntosh Acoustic Engineers have refined the line source
Column Loudspeaker concept to provide superior quality
midrange and high frequency sound reproduction in a full
range system.
The High Frequency Section
utilizes a patented
Column Design
1
with multiple four
inch Midrange
LD/HP2 Magnetic
Circuit Design
Drivers and one
Figure 1
inch soft dome Tweeters. Refer to figure 1. Since the audio
power fed to a column is distributed among all the drivers,
each driver does not have to work as hard, resulting in
greater power handling capability and a dramatic reduction
in distortion. The Sound Waves from the Column produce
a Cylindrical Wave Front with a stable symmetrical horizontal sound dispersion to minimize undesirable floor and
ceiling reflections
that could
detract from
a stable
sound image. Refer
to figure 2.
In the illus-
Figure 2
tration the
Loudspeaker on the left side produces a Cylindrical Wave
Front and the Loudspeaker on the right side produces a
conventional Spherical Wave Front.
The Low Frequency Section of the System consists of
two 12 inch Woofers. They have a large magnet assembly
and long
cone excursions
with very
low levels
of harmonic distortion and
frequency
response
down to
16Hz. Refer to fig-
1
COLUMN Pat. No. 4,267,405 2LD/HP Pat. No. 5,151,943
Figure 3
ure 3. The Woofer also incor-
LD/HP
porates McIntosh’s Patented
LD/HP
2
Magnetic Circuit De-
Conventional
sign with shielding to greatly
reduce any external magnetic
field. Extensive investigating
and testing resulted in a new
design concept which utilizes
a pair of aluminum shorting
sleeves in the magnetic cir-
Figure 4
cuit. Refer to figure 4. The sleeves virtually eliminate 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 5. Additional benefits are
less volume compression due to improved heat transfer
Figure 5
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 distortion is incredible smoothness and clarity in
the reproduction of the human voice.
The Crossover Networks used in the XRT30 Loudspeaker System are designed to ensure an even
frequency response over
the entire audible range.
The Low Frequency Crossover Network
is a Third Order design utilizing Capacitors and Inductors with
high current
Figure 6
capacity. Refer to figure 6. There are three different types
of low loss (DCR) Inductors in the network, each one chosen not to exhibit any core saturation even at high power
4
levels. This prevents the addition of distortion to the music
at low frequencies. The High Frequency Crossover Network utilizes both
Second and Third
Order Crossover
Designs. Refer to
figure 7. It also uses
Capacitors and Inductors with high
current capacity.
The Capacitors
used include low
loss (ESR) Polypropylene and Mylar
types. Both Crossover Networks also
utilize self resetting
high current PolySwitches to provide an extra measure of protection.
The enclosures are an important part of the XRT30
Loudspeaker System. The Bass Section Cabinet is constructed from 1
inch and 1-1/2 inch
thick MDF with
laminated hardwoods and veneers.
Internally, the cabinet is reinforced
with multiple MDF
Cross-Bracing
Trusses all designed to help insure that the cabinet will not vibrate.
Refer to figure 8.
The High Frequency Column
Section utilizes a
massive extruded
aluminum enclosure that houses the 30 four inch Midrange
and 25 one inch Tweeter Drivers. Refer to figure 9. It also
has multiple front
to back internal
braces to form a
dampened rigid
Column Structure. The
Column’s small
footprint allows for a variety of different placements in a
room.
Figure 7
Figure 8
Figure 9
Introduction and Performance Features
Performance Features
Patented LD/HP Technology
•
The McIntosh Low Frequency and Midrange Loudspeaker
Elements feature the patented LD/HP Magnetic Circuit
Design. This design, when compared to conventional
Loudspeaker Elements, reduces distortion significantly. It
also increases power handling and efficiency.
Neodymium-Iron-Boron Alloy Magnets
•
The 30 four inch Midranges and 25 one inch Dome Tweeters all use this Alloy. The Neodymium-Iron-Boron Alloy
has a high flux density per unit of volume and helps to
keep the Column weight to a minimum.
Shielded Magnetic Field
•
The XRT30 may be used in Home Theater Installations
near a television receiver or monitor without causing the
television image to degrade. McIntosh has designed
special shielding around the magnetic structure of the
XRT30 Loudspeaker Elements to prevent interference.
High Power Handling
•
The Loudspeaker Elements and Crossover Components of
the XRT30 are all chosen for use with powerful amplifiers
up to 1,200 watts.
Superior Imaging
•
Locating the Column of Tweeters between the two
Columns of Midranges helps to generate a symmetrical
horizontal polar response for superior imaging.
Versatile Operation and Placement
•
In additional to the regular connections, the XRT30 Loudspeaker System provides separate connections for Bi-Amplification and Tri-Amplification hookups. The Crossover
Network has provisions to ensure the best performance
when the High Frequency Column is mounted in a wall.
Gold Plated Input Connectors
•
The XRT30 input connectors are gold plated for superior
corrosion resistance and high electrical conductivity.
5
XRT30 Bass Section Dimensions
The following dimensions can assist in determining the
best location for your XRT30 Loudspeaker System.
Top View of the XRT30 Bass Section
17"
43.18cm
37-
3/4
95.88cm
Side View of the XRT30 Bass Section
17"
43.18cm
"
17"
43.18cm
14"
1"
2.54cm
35.56cm
Front View of the XRT30 Bass Section
14
-7/8
"
37.78cm
14"
35.56cm
31-
15/16
"
81.12cm
1
-3/4
"
4.45cm
1
-5/8
"
4.13cm
18
-5/8
"
47.31cm
6
37-
1/2
"
95.25cm
14
-7/8
37.78cm
20
-1/4
51.44cm
"
"
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