Infinity Intermezzo 4.1-T Owners manual
Owner’s Guide
INTERMEZZO™4.1t
IMPORTANT
SAFETY PRECAUTIONS
iii
INTERMEZZO 4.1t
Read First!
1. Read Instructions. All the safety and operating
instructions should be read before the product is
operated.
2. Retain Instructions.The safety and operating
instructions should be retained for future
reference.
3. Heed Warnings. All warnings on the product
and in the operating instructions should be
adhered to.
4. Follow Instructions.All operating and use
instructions should be followed.
5. Cleaning. Unplug this product from the wall
outlet before cleaning.Do not use liquid cleaners
or aerosol cleaners. Use a damp cloth for
cleaning.
6.Water and Moisture. To reduce the risk of fire
or electric shock, do not use this product
outdoors or near water–for example, near a
bathtub,wash bowl, kitchen sink or laundry tub; in
a wet basement; near a swimming pool;or the
like.
7.Accessories. Do not place this product on an
unstable cart, stand,tripod,bracket or table.The
product may fall,causing serious injury to a
child or adult, and serious damage to the
product. Use only with a cart, stand,tripod,
bracket or table recommended by the
manufacturer, or sold with the product.Any
mounting of the product should follow the
manufacturer’s instructions, and should use a
mounting accessory recommended by the
manufacturer.
8. Power Sources. This product should be
operated only from the 230 AC power source
indicated on the marking label. If you are not
sure of the type of power supply to your home,
consult your product dealer or local power
company.
9. Power-Cord Protection. Power-supply cords
should be routed so that they are not likely to be
walked on or pinched by items placed upon or
against them, paying particular attention to cords
at plugs, convenience receptacles, and the point
where they exit from the product.
10. Nonuse Periods. The power cord of the
product should be unplugged from the outlet
when left unused for long periods of time.
11. Overloading. Do not overload wall outlets or
extension cords,this can result in a risk of fire
or electric shock.
12. Object and Liquid Entry. Never push objects
of any kind into this product through openings,
as they may touch dangerous voltage points or
short-out parts that could result in a fire or
electric shock. Never spill liquid of any kind on
the product.
13. Servicing. Do not attempt to service this
product yourself, as opening or removing covers
may expose you to dangerous voltage or other
hazards.
Unplug this product from the wall outlet and
refer servicing to qualified service personnel.
14.Wall or Ceiling Mounting.The product should
be mounted to a wall or ceiling only as
recommended by the manufacturer.
15. Heat. The product should be situated away
from heat sources such as radiators, heat
registers,stoves or other products (including
amplifiers) that produce heat.
iii Important Safety Precautions
1 Technology
1 Ceramic Metal Matrix Diaphragms
™
(C.M.M.D.)
1 Transducers
1 Room-Friendly Acoustical Design
2 Amplifier
2 Completing the Experience
2 Unpacking the Product/Included Accessories
3 Placement
4 Controls and Connections
5 Connection Methods 1–4
8 Room Adaptive Bass Optimization System
™
(R.A.B.O.S.)
9 Contents of the R.A.B.O.S.Test CD
9 R.A.B.O.S.Sound-Level Meter (RSLM)
14 What You Measure, What To Do
17 Adjusting the R.A.B.O.S.Equalizer
18 Final System Balance
19 Maintenance and Service
20 Specifications
21 R.A.B.O.S. Measurement Templates
23 Notes
Table of Contents
INTERMEZZO 4.1t OWNER’S GUIDE
iv
INTERMEZZO 4.1t
1
INTERMEZZO 4.1t
Infinity Intermezzo 4.1t
This loudspeaker system represents a refinement of the principles that have guided Infinity’s loudspeaker designs for more than
30 years. Loudspeaker development is generally an evolutionary
process.New models usually perform slightly better than the ones
they replace.Over time,the subtle improvements add up and, when
the latest model is compared to a loudspeaker that is ten or
twelve years old,the disparity is unmistakable.
Every once in a while, a loudspeaker is developed that transcends
this pattern – its performance so remarkable, its design so stunning, its technology so advanced, it can truly be described as revolutionary.The new Infinity Intermezzo 4.1t loudspeaker system is
an elegant case in point.
The Intermezzo 4.1t system is a 4-way loudspeaker with its
mid-bass, midrange and high-frequency-driver array mounted atop
a 12", 850-watt powered subwoofer. With its proprietary Ceramic
Metal Matrix Diaphragms™, powerful BASH
®
amplifiers and
sophisticated, yet refined, dividing networks, the Intermezzo 4.1t
will breathe life into any musical or cinematic performance and
touch the soul of the listener.
The Intermezzo 4.1t is the consummation of Infinity’s quest to
apply “science in the service of art.”
The Intermezzo 4.1t system incorporates several innovative technologies that, when implemented by exceptional engineering talent
after hours upon hours of subjective listening evaluations,result in a
loudspeaker that realistically and accurately reproduces the signal
source with minimal distortion and coloration.
Ceramic Metal Matrix Diaphragms™(C.M.M.D.)
For decades, loudspeaker engineers have known that the ideal
transducer should be stiff,yet light, and have high internal
damping (damping is a material’s ability to absorb energy).
Infinity’s C.M.M.D. transducer is a significant advance in
transducer technology.Ceramic,a class of material new to
loudspeakers, offers better performance than that of other
materials. Ceramic is stiffer than metals and lighter than plastics
and typical composite materials; it also offers improved damping.
These ceramic-based transducers take us a giant step closer to
the ever-elusive “ideal transducer.”
In tweeters, C.M.M.D.technology offers stiffness and damping
superior to that of traditional metals and soft-dome materials.
In woofer and midrange applications,it offers accurate pistonic
operation over the entire frequency range of the driver,
completely eliminating coloration due to cone breakup and
dramatically reducing distortion.And when ceramic-metal-matrix
transducers are exposed to moisture, sunlight or extreme
temperatures,their performance does not deteriorate.
Transducers
In addition to ceramic diaphragms,all the transducers incorporate
magnetic shielding and rigid cast-frames that,through our FEA
computer modeling and scanning-laser-vibrometer measurements,
have been optimized to reduce resonances.This ensures minimal
distortion and incomparable performance.
The 12" low-frequency transducer is the embodiment of
uncompromised driver design.The ceramic-metal-matrix cone is
attached to a rigid cast-aluminum frame,through a compressionmolded, butyl-rubber surround.The motor assembly incorporates a
vented polepiece for maximum heat dissipation with negligible air
turbulence.The frame itself is also vented to further improve heat
dissipation.The motor structure uses a 3", edge-wound, copper
voice coil for high power handling and minimal power
compression.
To maximize system performance, the flat-spider assembly and the
cone are mounted to different points on the fiberglass former,
increasing reliability and reducing distortion, especially at high
output levels.An extra-thick top plate and dual-magnet structure
are utilized to allow for huge peak-to-peak driver excursions,with
significantly lower distortion and a more linear frequency
response than is true of typical drivers.
When installed in its heavily braced and reinforced elliptical
enclosure and coupled with a powerful 850-watt amplifier and
Infinity’s proprietary Room Adaptive Bass Optimization System
™
(R.A.B.O.S.),this 12"low-frequency transducer allows the
Intermezzo 4.1t system to deliver bass that will cleanly and naturally reproduce the lowest notes of a pipe organ or the loudest explosions from last summer’s hottest action films.
Room-Friendly Acoustical Design
Driver quality is not the only requirement for exceptional
performance. Infinity’s engineers understand that the room in
which the loudspeaker is placed can greatly affect its
performance.To ensure that Intermezzo 4.1t loudspeakers will
sound exceptional in even the most unexceptional listening
environment,Infinity has developed two ways to solve most roomgenerated problems.The first is its proprietary Room Adaptive
Bass Optimization System™. With a single band of parametric
equalization, the Intermezzo 4.1t can be adjusted to tame any
problematic room bass resonances below 80Hz.
There is a completely different set of room-related problems that
has to do with loudspeaker directivity and that can affect the
reproduction of mid and high frequencies. One characteristic of
forward-facing loudspeakers is that the sound output lessens as
one moves away from the principal axis.This happens both
horizontally and vertically and it means that radiated sounds that
are reflected from the floor, ceiling and side walls will be lower
in amplitude than direct, forward sound.This is usually a good
thing. But, if the dispersion characteristics of the loudspeaker are
different at various frequencies, the sound quality of the reflected
sounds will be very different both from each other and from the
T
ECHNOLOGY
Power
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-13
-15
-18
U-R
Batt
first (i.e.,direct) sound.The ears don’t ignore these differences;
they perceive them as coloration, or as sound quality that’s been
degraded.The Intermezzo 4.1t has been carefully designed to
maintain a directional pattern that is similar at every important
angle, on and off axis.The positive result is that both direct and
reflected sounds arriving at the listeners’ ears have similar timbral
signatures.
Amplifier
BASH®is an amplifier-power-supply technology that increases
efficiency by reducing power dissipation in the output section.The
BASH topology uses a high-efficiency,fast-response,switch-mode
power supply that provides the main voltage rails for a linear ClassAB amplifier. By varying the output of the power supply with the
audio signal being amplified, a constant voltage drop across the
output transistors of the linear amplifier can be maintained.This
means that the power dissipation in the output transistors is greatly
reduced.
The result is an extremely efficient audio amplifier that does not
compromise audio performance.
Completing the Experience
The technology and performance that make Infinity Intermezzo
loudspeakers ideal for music listening also make them the perfect
digital multichannel loudspeaker system.To complete a hometheater system, Infinity has designed, to the same precise standards
as the Intermezzo 4.1t, a matching 3-way center-channel
loudspeaker, the Intermezzo 3.5c. In addition,Intermezzo 2.6
bookshelf loudspeakers are available for use as full-range surround
channels.
We hope you enjoyed this brief introduction to the technology of the
Intermezzo 4.1t loudspeaker system. If you would like to further
explore the technology and design of the Intermezzo loudspeaker
system, please ask your Infinity dealer for the C.M.M.D. and
R.A.B.O.S.White Papers.The White Papers can also be downloaded
from Infinity’s Web site at www.infinitysystems.com.
Unpacking the Product
Finish unpacking the speakers and check the contents.If you suspect damage from transit,report it immediately to your dealer
and/or delivery service.Keep the shipping carton and packing materials for future use.
Included Accessories . . .
R.A.B.O.S. Kit (1) (Included with Left Subwoofer Only)
Sound-Level Meter R.A.B.O.S.Test CD
Graph Templates Bandwidth Selector
Adjustment Key
Grilles (2) Decorative
Side Panels
(2)
AC Cord
2
INTERMEZZO 4.1t
3
INTERMEZZO 4.1t
The Infinity Intermezzo 4.1t is designed to offer excellent
performance in any listening room or home-theater system.
However, the following placement guidelines and suggestions will
start you on your way to achieving optimum performance.
Remember, these are guidelines.We suggest you experiment with
positioning the loudspeakers to determine their ideal placement
in your particular listening room.
2-Channel or Front Left and Right
in a Home-Theater System
Generally,the system should be placed at least three feet away
from the side walls. In 2-channel applications, the two speakers
should be equidistant from your primary listening position.We
recommend that the angle formed between the speakers and the
listening area be between 45° and 60°. For example, if the speakers are 8' apart, your listening position should be 8' to
12' from each speaker. See Figure 1.With wider speaker separations, it may be advantageous to slightly angle the speakers, aiming them toward the listening area.
When used as part of a home-theater system, you may find that
you achieve excellent performance with the left and right speakers spread apart even further.Feel free to experiment with the
placement of the speakers to achieve the best possible sound in
your listening room.
Normally,it is recommended that the driver of each subwoofer
face toward the outside,and this is how the subs are packaged.In
some rooms,however, the system may perform better with the
woofers facing the inside.Feel free to experiment.
Surround Channels in a Home-Theater System
When used as part of a Dolby* ProLogic*,THX®, or discrete 5.1channel home-theater system, the surround speakers should be
placed at the sides of,and directed toward,the main listening
area. See Figure 2. If there are several rows of seating, place the
speakers, as described above, perpendicular to,or slightly
behind, the last row of seating.
When used as part of a 7-channel music or home-theater system,
place the side speakers at the sides of and directed toward the
main listening area. If there are several rows of seating, place the
speakers, as described above, perpendicular to the middle row of
seating.The rear speakers should be placed on the rear wall facing the front of the room.Each rear speaker should be about 1/3
of the way into the room, but never to the outside of the listening
area. See Figure 3.
As mentioned earlier, Intermezzo 4.1t offers several ways to finetune the system for optimum performance in any listening room.
These techniques, as well as Infinity’s exclusive R.A.B.O.S.system,
will be discussed in detail later in this manual.
PLACEMENT
➢
➢
SOFA
FRONT
LEFT
LEFT
SURROUND
FRONT
RIGHT
RIGHT
SURROUND
TV
CENTER
➢
➢
➢
➢
SOFA
FRONT
LEFT
LEFT
SIDE
REAR
LEFT
FRONT
RIGHT
RIGHT
SIDE
REAR
RIGHT
TV
CENTER
➢
➢
SOFA
LEFT
CHANNEL
RIGHT
CHANNEL
FIGURE 1
FIGURE 2
FIGURE 3
Speaker-Level Input
Low-Level-Input Connector
Low-Level-Output Connector
Bass-Mode Switch
High-Pass Filter Switch
AC-Cord Input
Power Switch
Subwoofer-Level Control
R.A.B.O.S. Controls
Center-Frequency Adjustment
R.A.B.O.S.Level
Bandwidth Adjustment
C
ONTROLS AND CONNECTIONS
Rear Panel
Front Panel
4
INTERMEZZO 4.1t
– +
INPUTS
INTERMEZZO 4.1t
220-240V-50HZ 6A
AC FUSE
6A 250V
POWER
®
ON
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
LOWLEVEL
INPUT
3
2
1
OFF
LOWLEVEL
OUTPUT
BASS
MODE
HIGH-PASS
FILTER
F
L
W
›
The Infinity Intermezzo 4.1t offers unprecedented flexibility for
connecting the system to any type of audio or home-theater system.
Consult the table at right to determine which system description
most closely matches your own, then follow the hook-up method
corresponding to that system.
If none of these system configurations seem to match yours,consult
your dealer or Infinity customer service for direction on how best to
hook up your system.
For Methods 2, 3a, 3b and 4,make sure all bass-management features are properly set.The Audio channels should all be set to
“Small”or “High-Pass” and the subwoofer set to “On.”
220-240V-50HZ 6A
INPUTS
POWER
ON
HIGH-PASS
FILTER
BASS
MODE
AC FUSE
6A 250V
OFF
– +
LOWLEVEL
INPUT
LOWLEVEL
OUTPUT
3
2
1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
®
INTERMEZZO 4.1t
AMPLIFIER/RECEIVER
SPEAKER
OUTPUTS
(ONE CHANNEL SHOWN)
––
LOOSEN TERMINALS
INSERT BARE END;
TIGHTEN TERMINALS
SET BASS MODE
TO POSITION 3
SET HIGH-PASS SWITCH
TO ON
++
1.
2.
3.
4.
BLACK =
–
NO STRIPE = –STRIPE =
+
RED =
+
220-240V-50HZ 6A
INPUTS
POWER
ON
HIGH-PASS
FILTER
BASS
MODE
AC FUSE
6A 250V
OFF
– +
LOWLEVEL
INPUT
LOWLEVEL
OUTPUT
3
2
1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
®
INTERMEZZO 4.1t
PREAMP OUTPUTS
L
R
(ONE CHANNEL SHOWN)
L
R
AMPLIFIER INPUTS
BLACK = –
STRIPE = +
RED = +
NO STRIPE = –
LOOSEN TERMINALS
INSERT BARE END;
TIGHTEN TERMINALS
SET BASS MODE
TO POSITION 2
SET HIGH-PASS SWITCH
TO OFF
1.
2.
3.
4.
AMPLIFIER/RECEIVER
SPEAKER OUTPUTS
SPEAKER
OUTPUTS
LEFT RIGHT
––
++
System Type Connection Methods
2-Channel receiver or integrated amplifier
that has no subwoofer output or
Pre-out/Main-In connectors 1
2-Channel receiver or integrated amplifier
with preamp output and input connectors 2
2-Channel system with separate preamplifier
and power amplifier 2
Dolby Pro Logic with THX, Dolby Digital,
or DTS
®
receiver with a filtered subwoofer
(or LFE) output connector 3a
Dolby Digital or DTS processor with separate
power amplifiers or multichannel amplifier 3b
Non-THX certified Dolby Pro Logic receiver
with full-range subwoofer outputs 4
Method 1
Method 2
5
INTERMEZZO 4.1t
220-240V-50HZ 6A
INPUTS
POWER
ON
HIGH-PASS
FILTER
BASS
MODE
AC FUSE
6A 250V
OFF
– +
LOWLEVEL
INPUT
LOWLEVEL
OUTPUT
3
2
1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
®
INTERMEZZO 4.1t
SURROUND RECEIVER
SUBWOOFER (LFE)
OUTPUT
TO SECOND 4.1t
Y-Connector
BLACK =
–
NO STRIPE = –STRIPE =
+
RED =
+
LOOSEN TERMINALS
INSERT BARE END;
TIGHTEN TERMINALS
SET BASS MODE
TO POSITION 1
SET HIGH-PASS SWITCH
TO OFF
1.
2.
3.
4.
(ONE CHANNEL SHOWN)
–
+
FRONT SPEAKER
OUTPUTS
220-240V-50HZ 6A
INPUTS
POWER
ON
HIGH-PASS
FILTER
BASS
MODE
AC FUSE
6A 250V
OFF
– +
LOWLEVEL
INPUT
LOWLEVEL
OUTPUT
3
2
1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
®
INTERMEZZO 4.1t
AMPLIFIER PROCESSOR
SUBWOOFER (LFE)
OUTPUT
TO SECOND 4.1t
SPEAKER
OUTPUT
INPUT
– +
L
R
FRONT CHANNEL
OUTPUT
L
R
(ONE CHANNEL SHOWN)
LOOSEN TERMINALS
INSERT BARE END;
TIGHTEN TERMINALS
SET BASS MODE
TO POSITION 1
SET HIGH-PASS SWITCH
TO OFF
1.
2.
3.
4.
BLACK = –
NO STRIPE = – STRIPE = +
RED = +
Y-Connector
Method 3a
Method 3b
6
INTERMEZZO 4.1t
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