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Owner’s Guide
MODULUS
®
HOME-THEATER SYSTEM
ii
MODULUS
THIS INFINITY PRODUCT IS DESIGNED FOR 120-VOLT USE ONLY! FOR
DETAILED SAFETY PRECAUTIONS, PLEASE SEE FOLLOWING PAGE IN THIS
OWNER’S MANUAL FOR “IMPORTANT SAFETY INSTRUCTIONS.”
The lightning flash with arrowhead symbol, 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 sufficient 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 product.
L’éclair avec le symbole de la flèche, placé dans les limites d’un triangel équilatéral est
prévu pour avertir l’utilisateur de la présence de “tension dangereuse” non isolée dans
l’enceinte du produit qui pourrait être d’une importance suffisante pour présenter un
risque d’électrocution aux personnes.
Le point d’exclamation dans un triangel équilateral est prévu pour avertir l’utilisateur
de la présence d’instructions importantes pour les opérations et l’entretien (service)
dans les manuels fournis avec l’appareil.
ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE
LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE
CORRESPONDANTE DE LA PRISE ET POUSSER JUSQUAU FOND.
Este destello luminoso con un símbolo de punta de flecha dentro de un triángulo
equilátero tiene el objectivo de alertar al usuario sobre la presencia de “voltaje
peligroso” no aislado dentro de la caja del producto que puede ser de magnitud lo
suficientemente grande para constituir un riesgo de choque eléctrico para las personas.
Este punto de exclamación dentro de un triángulo equilátero tiene el objectivo de
alertar al usuario sobre la existencia de instrucciones operativas y de mantenimiento
(servicio) importantes en la literatura que acomaña el aparato.
CUIDADO: PARA REDUCIR EL RIESGO DE CHOQUE ELÉCTRICO, NO
RETIRE LA CUBIERTA (O RESPALDO). DENTRO NO HAY PEIZAS A LAS
QUE EL USUARIO PUEDE DAR SERVICIO. REMITA EL SERVICIO AL
PERSONAL DE SERVICIO CALIFICADO.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: SHOCK HAZARD, DO NOT OPEN.
AVIS: RISQUE DE CHOC ELECTRIQUE – NE PAS OUVRIR.
CUIDADO: PELIGRO DE CHOQUE ELÉCTRICO – NO ABRIR.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (0R BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF
PLUG TO WIDE SLOT; FULLY INSERT.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO
NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
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.Attachments. Do not use attachments not
recommended by the product manufacturer,
as they may cause hazards.
7.Water and Moisture.To reduce the risk of fire or
electric shock,donot 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.
8.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.
9.A Product and Cart Combination
Should Be Moved with Care.
Quick
stops,excessive force and uneven
surfaces may cause the product and
cart combination to overturn.
10.Ventilation. Slots and openings in the cabinet are
provided for ventilation and to ensure reliable
operation of the product and to protect it from
overheating,and these openings must not be blocked
or covered.The openings should never be blocked by
placing the product on a bed,sofa,rug or other
similar surface.This product should not be placed in a
built-in installation,such as a bookcase or rack,
unless proper ventilation is provided or the
manufacturer’s instructions have been adhered to.
11.Power Sources.This product should be operated
only from the type of 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.For products intended to operate
from battery power,or other sources,refer to the
operating instructions.
12.Grounding or Polarization.This product may be
equipped with a polarized alternating-current-line plug
(a plug having one blade wider than the other).This
plug will fit into the power outlet only one way.This is
a safety feature.If you are unable to insert the plug
fully into the outlet,try reversing the plug.If the plug
should still fail to fit,contact your electrician to
replace your obsolete outlet.Do not defeat the safety
purpose of the polarized plug.
13.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.
14.Nonuse Periods.The power cord of the product
should be unplugged from the outlet when left unused
for long periods of time.
15.Outdoor Antenna Grounding. If an outside antenna
or cable system is connected to the product,be sure
the antenna or cable system is grounded so as to
provide some protection against voltage surges and
built-up static charges.Article 810 of the National
Electrical Code,ANSI/NFPA 70,provides information
with regard to proper grounding of the mast and
supporting structure,grounding of the lead-in wire to
an antenna discharge unit,size of grounding
conductors,location of antenna-discharge unit,
connection to grounding electrodes,and requirements
for the grounding electrode.See Figure A.
16.Lightning. For added protection for this product
during a lightning storm,or when it is left unattended
and unused for long periods of time,unplug it from
the wall outlet and disconnect the antenna or cable
system.This will prevent damage to the product due to
lightning and power-line surges.
17.Power Lines.An outside antenna system should not
be located in the vicinity of overhead power lines or
other electric light or power circuits,or where it can
fall into such power lines or circuits.When installing
an outside antenna system,extreme care should be
taken to keep from touching such power lines or
circuits,as contact with them might be fatal.
18.Overloading. Do not overload wall outlets,extension
cords,or integral convenience receptacles,as this can
result in a risk of fire or electric shock.
19.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.
20.Servicing. Do not attempt to service this product
yourself,as opening or removing covers may expose
you to dangerous voltage or other hazards.Refer all
servicing to qualified service personnel.
21.Damage Requiring Service. Unplug this product
from the wall outlet and refer servicing to qualified
service personnel under the following conditions:
a. The power-supply cord or the plug has been
damaged;or
b. Objects have fallen onto,or liquid has been spilled
into,the product;or
c. The product has been exposed to rain or water;or
d. The product does not operate normally when
following the operating instructions.Adjust only those
controls that are covered by the operating instructions,
as an improper adjustment of other controls may
result in damage and will often require extensive work
by a qualified technician to restore the product to its
normal operation;or
e. The product has been dropped or damaged in any
way;or
f. The product exhibits a distinct change in
performance;this indicates a need for service.
22.Replacement Parts. When replacement parts are
required,be sure the service technician has used
replacement parts specified by the manufacturer or
that have the same characteristics as the original
part.Unauthorized substitutions may result in fire,
electric shock or other hazards.
23.Safety Check. 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.
24.Wall or Ceiling Mounting.The product should be
mounted to a wall or ceiling only as recommended by
the manufacturer.
25.Heat.The product should be situated away from
heat sources such as radiators,heat registers,stoves
or other products (including amplifiers) that produce
heat.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To prevent electric shock,
do not remove the grounding plug
on the power cord, or use any plug
or extension cord that does not have
a grounding plug provided.
Make certain that the
AC outlet is properly grounded.
Do not use an adapter plug
with this product.
The lightning flash with arrowhead symbol,
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 sufficient 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.
Antenna Lead-In Wire
Ground Clamp
Antenna Discharge Unit (NEC Section 810-20)
Grounding Conductors (NEC Section 810-21)
Electric Service Equipment
Ground Clamps
Power Service Grounding Electrode System
(NEC Art. 250, Part H)
Figure A.
Example of Antenna Grounding as per
National ElectricalCode ANSI/NFPA 70
iii
MODULUS
I
MPORTANT
S
AFETY
P
RECAUTIONS
iv
MODULUS
ii Caution
iii Important Safety Precautions
1 Introduction
1 Technology
1 Ceramic Metal Matrix Diaphragms
™
(C.M.M.D.)
1 Amplifier
1 Room-Friendly Acoustical Design
2 Unpacking the System
3 Planning Your System
3 Placement
6 Center and Satellite Speaker Connections
7 Subwoofer Controls
8 Subwoofer Connections
9 Operation
10 Room Adaptive Bass Optimization System
™
(R.A.B.O.S.)
11 Contents of the R.A.B.O.S.Test CD
11 R.A.B.O.S.Sound-Level Meter (RSLM)
16 What You Measure,What To Do
19 Adjusting the R.A.B.O.S.Equalizer
20 Final System Balance
20 Maintenance and Service
21 Specifications
22 R.A.B.O.S. Measurement Templates
Table of Contents
MODULUS HOME-THEATER SYSTEM OWNER’S GUIDE
1
MODULUS
The Infinity Modulus Home-Theater System is a compact,
efficient,universal satellite,center-channel and subwoofer
system that is ideal for reproducing home-theater sound.With
their versatile design,the satellite speakers can be placed
virtually anywhere on shelves or stands,or mounted on a wall or
ceiling using the supplied base.The center channel can easily be
placed on top of,or on a shelf below,the television.The powered
subwoofer delivers tremendous bass performance from a
compact,easy-to-place design.
About This Manual
To start enjoying your new Modulus Home-Theater System,read
and then follow all instructions listed in this guide,as well as
those found in the owner’s manuals of associated components in
your audio system.Save all instructions for future reference.
Modulus loudspeakers incorporate several innovative technologies
that,when implemented by our exceptionally talented engineers 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.
CeramicMetal 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 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.
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.
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 Class-AB 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.
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 Modulus loudspeakers will sound
exceptional in even the most unexceptional listening environment,
Infinity has developed the proprietary Room Adaptive Bass
Optimization System™ (R.A.B.O.S.).With a single band of
parametric equalization,the Modulus subwoofer can be adjusted
to tame any problematic room-bass resonances below 80Hz.
We hope you enjoyed this brief introduction to the technology
featured in the Modulus Home-Theater System.If you would like
to further explore Modulus’technology and design,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.
I
NTRODUCTION
T
ECHNOLOGY
Unpacking the System
Carefully unpack the system.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.Open the package and verify the following contents:
• (1) Modulus Powered Subwoofer
• (1) A/C Power Cord
• (1) Modulus Center-Channel Speaker
• (4) Modulus Satellite Speakers with Attached Base
• (4) Modulus Wall-Mount Brackets (attached to Base of Satellites)
• (1) Wall-Mount Bracket With Bubble Level for Use as Mounting
Template.
• (1) R.A.B.O.S.Kit
• Hex Wrench
(Located Behind Rubber Cap of Satellite Base)
• Warranty Statement
2
MODULUS
To prevent fire or shock hazard,DO NOT EXPOSE THIS SYSTEM
TO RAIN OR EXCESSIVE MOISTURE.To avoid electric shock,
DO NOT OPEN THE ENCLOSURES! There are no user-serviceable
parts inside.Observe all warnings and cautions.
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-13
-15
-18
U-R
Batt
Sound-Level Meter R.A.B.O.S.Test CD
Graph Templates Bandwidth Selector
Adjustment Key
3
MODULUS
Before deciding where to best place your speakers, survey your
room and study Figure 1.
– In this overhead view of a typical installation,satellite
speakers are used to reproduce sound for the front and surround
channels.The center channel reproduces sound and dialog.The powered
subwoofer provides bass for effects and music.
NOTE:The satellite speakers can be placed directly on a shelf,
or mounted on a wall using the built-in base/bracket.
Front Left and Right Channels
For front left and right channels,place one satellite to the left
and another to the right of the television,as shown in Figure 1.
Since the speakers are magnetically shielded,you can place
them very close to the TV without worrying about the magnetic
field distorting the picture.
Center Channel
For the center channel,place the speaker directly on top of,
or below,your television.Use a shelf if the television does not
provide a stable platform.
Surround Channels
For surround left and right channels,place one speaker on the
left and another on the right,to the side of or behind the
listening area.
Subwoofer
Since the installation of a subwoofer can be somewhat more
complicated than installing full-range speakers,it is essential
that you read this section very carefully prior to connecting the
subwoofer to your system.Should you have questions relating to
installation,it is advisable to call either your dealer or Infinity’s
Customer Service Department for advice.
The performance of the subwoofer is directly related to its
placement in the listening room and how you align the subwoofer
with the satellite speakers.Setting the volume of the subwoofer
in relation to the left and right speakers is also of critical
importance because it is essential that the subwoofer integrate
smoothly with the entire system.Setting the subwoofer’s volume
level too high will result in an overpowering,boomy bass.Setting
the volume level too low will negate the benefits of the subwoofer.
Here are several additional facts on installation that may prove
useful.It is generally believed that low frequencies (below
125Hz) are nondirectional and,therefore,placement of a
subwoofer within any listening room is not critical.While in
theory it is true that the larger wavelengths of extremely low
frequencies are basically nondirectional,the fact is that,when
installing a subwoofer within the limited confines of a room,
reflections,standing waves and absorptions generated within the
room will strongly influence the performance of any subwoofer
system.As a result,specific location of the subwoofer becomes
important,and we strongly recommend that you experiment with
placement before choosing a final location.Placement will
depend upon your room (for example,whether or not your room
permits placement of the subwoofer near either satellite) and
the amount and quality of bass required.
The R.A.B.O.S.guide,which begins on page 10,will also assist you
in optimizing bass response for your room.
TELEVISION
SATELLITE SPEAKER
For Left Channel
POWERED
SUBWOOFER
SATELLITE SPEAKER
For Right Channel
SATELLITE SPEAKER
For Left Surround
SATELLITE SPEAKER
For Right Surround
CENTER-CHANNEL
SPEAKER
On Top of Television
P
LANNING
Y
OUR
S
YSTEM
P
LACEMENT
FIGURE 1
For Shelf Placement
1.Remove the Modulus satellites from the box.Remove rubber
cover from the base and pull out Allen wrench.
2.Use the Allen wrench to loosen the adjustment screw (as
necessary) to allow the mounting ball on the speaker to turn
freely in the cup restraint.
3.Run the speaker wires in through the rear of the base and
up through the speaker wire holes on the left and right sides
of the cup restraint (see page 6,Figure 9 for wire connections).
4.Rotate speaker on its base into the shelf placement position as
shown below.Tighten the adjustment screw with the Allen wrench
(securing the speaker in position) and replace the cover.
4
MODULUS
Adjustment
Screw
Allen Wrench
housed
in Base
Rubber
Cover
Mounting Plate Screw
Base
Mounting Plate shown removed from Base.
The Mounting Plate is used to secure the
Modulus to a surface in a fixed position
such as for wall-mounting or on an
uneven surface.
Speaker
Adjustment Screw
Speaker
Mounting Ball
Cup Restraint
Connector Posts
Speaker
Wire Hole
I
NSTALLING THE
S
ATELLITES
FIGURE 5
FIGURE 4
FIGURE 3
FIGURE 2
For Wall-Mounting
Note: The customer is responsible for the correct selection and use
of mounting hardware (available through hardware stores) that will
ensure the proper and safe wall-mounting of the speakers.
1.Remove the Modulus from its box.Remove rubber cover from
the base and pull out Allen wrench.Use Allen wrench to remove
mounting plate screw and remove mounting plate from base.
2.Secure the mounting plate to a wall stud using (4) #8-32
wood screws with a minimum 1-1/4" length.If fastened to
sheetrock or wallboard with a minimum 1/2" depth,use #8
screws with plastic inserts or anchors.Do not mount directly to
sheetrock or wallboard without plastic inserts or anchors
designed for #8 screws.One of the mounting plates in the
Modulus system has a built-in bubble level for leveling while
securing to the wall.This mounting plate should be used as a
template for mounting the mounting plates that do not include
a bubble level.
2a.In cases where you would like to run the speaker wires through
the wall,the mounting plate has a center hole for wire access.
3.Run the speaker wires through the base as shown below.
Attach base to mounting plate by slipping the returns on
underside of base into slots on the top of the mounting plate
and hinging the base downward.Secure base by inserting and
tightening mounting plate screw.Tighten adjustment screw,
fixing the speaker in position.
4.Insert the Allen wrench back into holder in base
and attach rubber cover.
5
MODULUS
Adjustment
Screw
Allen Wrench
housed
in Base
Rubber
Cover
Mounting Plate Screw
Base
Speaker
Mounting Plate
Speaker Wires
Hole in the wall
WALL
Bubble Level
Viewed from below
Note:
Base has returns
that grab Mounting Plate
Returns on
underside of Base
Rubber Cover
Speaker Wires
Adjustment Screw
Allen Wrench
FIGURE 6
FIGURE 7
FIGURE 8
#8-32 wood
screws (not
included)
6
MODULUS
C
ENTER AND
S
ATELLITE
S
PEAKER
C
ONNECTIONS
Turn Off All Power
After placing the speakers,you are ready to connect your
system.First,turn off all audio-system power.Use high-quality
speaker wire to make your connections.Use at least #16-gauge
speaker wire with polarity coding.The side of the wire with
a ridge or other coding is usually considered positive polarity
(i.e.,+ ).Also,consult the owner’s manuals that were included
with your amplifier or receiver to confirm connection
procedures.
Satellites
Observe polarities when making speaker connections,as shown
in Figure 9.Connect each + terminal on the back of the
amplifier or receiver to the respective + (red) terminal on each
speaker.Connect the – (black) terminals in the same way.
Important!
Do not reverse polarities (i.e.,+ to – or – to +) when making
connections.Doing so will cause poor imaging and diminished
bass response.Be certain that positive and negative wire
strands are completely isolated to avoid short circuits that may
damage your equipment.
– Wiring diagram shows polarity connections for one
channel of a home-theater system.
Center Channel
Observe polarities when making speaker connections,as shown
in Figure 9.Connect each + terminal on the back of the
amplifier or receiver to the respective + (red) terminal on the
speaker.Connect the – (black) terminals in the same way.
Important!
Do not reverse polarities (i.e.,+ to – or – to +) when making
connections.Be certain that positive and negative wire strands
are completely isolated to avoid short circuits that may damage
your equipment.
– The satellites and center-channel speaker feature
terminals that can be connected in several different ways;e.g.,banana
plugs,spade terminals and direct wiring (as shown here).
FIGURE 9
FIGURE 10
7
MODULUS
Rear Panel
Front Panel
+
+
+
+
L
In Out
In Out
POWER3A 250V
Caution: For continued protection against risk of fire,
replace only with same type fuse and rating.
Attention: Utiliser un fusible de rechange
de meme type et calibre.
3A 120VAC 60Hz
Off
On
Right
Left
Input
Select
Low-Pass
Filter
R.A.B.O.S.
Phase
R
L
R
Speaker
Line
WARNING: SHOCK HAZARD • DO NOT OPEN
NO USER SERVICEABLE PARTS INSIDE
AVIS: RISQUE DE CHOC ELECTRONIQUE
NE PAS OUVRIR
ANSI/UL-1492
LR106476
On
Off
On
Off
Freq.
Level
Width
0
o
180
o
Line Level
SPEAKER LEVEL
Line-Level Inputs
Line-Level Outputs
Input Selector
Low-Pass Filter Selector
Phase Switch
Speaker-Level Connectors
AC Cord Input
Power Switch
Subwoofer Gain Control
Room Adaptive Bass Optimization System Controls (R.A.B.O.S.)
R.A.B.O.S.On/Off Switch
Center-Frequency Adjustment
R.A.B.O.S.Level
Bandwidth Adjustment
A Few Suggestions
We recommend that you do not operate your speakers or
subwoofer with the bass,treble and loudness controls set to
full boost.This will place undue strain on your electronics and
speakers and could damage them.
The volume control setting on your processor/preamp or
receiver is not a specific indication of the overall loudness level
of the speakers.The only important consideration is the loudness
level at which the system can be played,regardless of where the
volume control is set.
Always turn down the volume control setting on your processor/
preamp or receiver when changing a cassette or CD,or
switching inputs to AM or FM operation.Excessively loud
transients (clicks or popping sounds) can damage the satellite
speakers and possibly the subwoofer.
Important!
Whenever changing cables,pulling plugs,etc.,ALWAYS TURN
OFF ALL EQUIPMENT,including the subwoofer.This prevents
transients from entering the speakers and prevents electrical
energy from reaching you.Keep all connections out of the reach
of children.
S
UBWOOFER
C
ONTROLS
8
If your receiver/processor does not have subwoofer outputs for
the left and right channels or an LFE output:
• Set Input Selector to “Speaker.”
• Set Low-Pass Filter to “On.”
LOOSEN TERMINALS
INSERT BARE END;
TIGHTEN TERMINALS
1.
2.
BLACK =
–
NO STRIPE = – STRIPE = +
RED = +
L
In Out
In Out
POWER3A 250V
Caution: For continued protection against risk of fire,
replace only with same type fuse and rating.
Attention: Utiliser un fusible de rechange
de meme type et calibre.
3A 120VAC 60Hz
Off
On
Right
Left
Input
Select
Low-Pass
Filter
R.A.B.O.S.
Phase
R
L
R
WARNING: SHOCK HAZARD • DO NOT OPEN
NO USER SERVICEABLE PARTS INSIDE
AVIS: RISQUE DE CHOC ELECTRONIQUE
NE PAS OUVRIR
ANSI/UL-1492
LR106476
On
Off
0
o
180
o
On
Off
Freq.
Level
Width
RECEIVER/AMPLIFIER
Front Speaker Output
Line Level
Speaker
Line
SPEAKER LEVEL
If your receiver/processor has subwoofer
outputs for the left and right channels:
If you have a Dolby* Digital or DTS
®
receiver/processor with a
low-frequency-effect (LFE) output:
Note:Some receivers have a single subwoofer output.
In that case,it is recommended that you use a Y connector
(not included) to maximize performance.
SUBWOOFER OR
LFE OUTPUT
+
+
+
+
––
––
L
In Out
In Out
POWER3A 250V
Caution: For continued protection against risk of fire,
replace only with same type fuse and rating.
Attention: Utiliser un fusible de rechange
de meme type et calibre.
3A 120VAC 60Hz
Off
On
Right
Left
Input
Select
Low-Pass
Filter
R.A.B.O.S.
Phase
R
L
R
WARNING: SHOCK HAZARD • DO NOT OPEN
NO USER SERVICEABLE PARTS INSIDE
AVIS: RISQUE DE CHOC ELECTRONIQUE
NE PAS OUVRIR
ANSI/UL-1492
LR106476
On
Off
180
°
0
°
On
Off
Freq.
Level
Width
Line Level
Speaker
Line
SPEAKER LEVEL
L
In Out
In Out
POWER3A 250V
Caution: For continued protection against risk of fire,
replace only with same type fuse and rating.
Attention: Utiliser un fusible de rechange
de meme type et calibre.
3A 120VAC 60Hz
Off
On
Right
Left
Input
Select
Low-Pass
Filter
R.A.B.O.S.
Phase
R
L
R
WARNING: SHOCK HAZARD • DO NOT OPEN
NO USER SERVICEABLE PARTS INSIDE
AVIS: RISQUE DE CHOC ELECTRONIQUE
NE PAS OUVRIR
ANSI/UL-1492
LR106476
On
Off
On
Off
Freq.
Level
Width
RECEIVER/PROCESSOR
0
o
180
o
Line Level
Speaker
Line
SPEAKER LEVEL
• Set Input Selector
to “Line.”
• Set Low-Pass
Filter to “On.”
• Set Input Selector
to “Line.”
• Set Low-Pass
Filter to “Off”.
MODULUS
S
UBWOOFER
C
ONNECTIONS
9
MODULUS
Surround Modes
When using the Modulus system in a Dolby* Pro Logic* home-
theater system,make sure the receiver’s center-channel mode is
set to “Normal”.When using the Modulus system in a Dolby Digital
or DTS home-theater system,make sure the receiver’s speaker
modes are set to “Small”.
Some Dolby Digital-equipped receivers/processors offer different
setup options for each source or surround mode:e.g.,CD-stereo,
videotape,Dolby,Pro Logic.In each case,follow your equipment’s
instructions to ensure that the subwoofer output is turned on and
that the speakers are set to “Small”in each mode.
Power On
Plug your Modulus subwoofer’sAC cord into a wall outlet.Do not use
the outlets on the back of the receiver.
Initially set the subwoofer’s Gain Control
to the “O”position.
Turn on your sub by flipping the Power Switch
on the rear panel
to the ON position.
Auto On/Standby
With the Power Switch
in the ON position,the Gain Control
on the front panel will remain backlit in red or green to indicate
the On/Standby mode of the subwoofer.
RED = STANDBY (No signal detected,Amp Off)
GREEN = ON (Signal detected,Amp On)
The subwoofer will automatically enter the Standby mode after
approximately 10 minutes when no signal is detected from your
system.The subwoofer will then power ON instantly when a signal
is detected.During periods of normal use the Power Switch
can be left on.You may turn off the Power Switch
during
extended periods of non-operation:e.g.,when you are away on
vacation.
Adjust Gain
Turn on your entire audio system and start a CD or movie sound-
track at a moderate level.Turn your subwoofer’s Gain Control
up to the “5”position (half way).If no sound emanates from the
subwoofer,check the AC-line cord and input cables.Are the
connectors on the cables making proper contact? Is the AC plug
connected to a “live”receptacle? Has the Power Button
been
pressed to the “On”position? (Note:The Gain Control
on the
front panel will turn green when the power is on.) Once you have
confirmed that the subwoofer is active,proceed by playing a
sound source.Use a selection that has ample bass information.
Set the overall volume control of the preamplifier or stereo to a
comfortable level.Adjust the subwoofer’s Gain Control
until
you obtain a pleasing blend of bass.Bass response should not
overpower the room but rather be adjusted so there is a
harmonious blend across the entire musical range.Many users
have a tendency to set the subwoofer volume too loud,adhering
to the belief that a subwoofer is there to produce lots of bass.
This is not entirely true.A subwoofer is there to enhance bass,
extending the response of the entire system so the bass can be
felt as well as heard.However,overall balance must be
maintained or the music will not sound natural.An experienced
listener will set the volume of the subwoofer so its impact on
bass response is always there but is never obtrusive.
Phase Control
The Phase Switch determines whether the subwoofer
speaker’s piston-like action moves in and out with the main
speakers,0˚,or opposite the main speakers,180˚.Proper phase
adjustment depends on several variables such as room size,
subwoofer placement and listener position.Adjust the phase
switch to maximize bass output at the listening position.
Final Positioning
After correctly connecting the Modulus system and verifying that
both the subwoofer and all satellite speakers are playing,it is
time to optimize the system for your particular listening room.
Earlier,you placed the subwoofer in its general location.Finding
the exact location for optimum performance sometimes only
involves moving the speakers up to a few inches in any direction.
We urge you,therefore,to experiment with placement,if possible,
until your speakers deliver their full potential.
O
PERATION
10
MODULUS
Infinity R.A.B.O.S.is a simple-to-use,yet sophisticated,low-
frequency calibration system.It is designed to work in
conjunction with the Infinity Modulus self-amplified subwoofer.
The Modulus subwoofer contains a parametric equalizer that you
will adjust as indicated by the R.A.B.O.S.test results.Following
these instructions,you will optimize the Modulus subwoofer’s
response characteristics to complement its environment.This will
dramatically improve the sound of your system.The optimization
process takes less than 30 minutes.
The R.A.B.O.S.Kit Includes
the Following Components:
• Specialized Sound-Level Meter
• Test CD
• Instructions
• Measurement Templates
• Width Selector
• Adjustment “Key”
What R.A.B.O.S.Does
The Test CD provides specially designed signals you will use
while performing measurements.The sound-level meter provided
is used to “acquire”the information needed for adjustments.You
will create a response plot on the Measurement Template.Using
the Width Selector,you will then determine the appropriate
equalizer settings.The “Key”is used to adjust the parametric
equalizer built into the Modulus subwoofer.After adjustment,the
test sequence is repeated to confirm your settings.
The R.A.B.O.S.Goal
It is a fact of audio that what we hear at low frequencies is
determined as much or more by the listening room than by the
loudspeaker itself.Placement of the loudspeakers and listeners
and the acoustical characteristics of the room surfaces are all
important determinants of bass quantity and quality.In most
practical situations,there is little that can be done about this,
except for patient trial-and-error repositioning of the
loudspeakers and listeners.Usually,the practical constraints of a
living space and the impracticality of massive acoustical
treatment mean that equalization is the only practical solution.
Professional sound engineers routinely employ sophisticated
measurement systems and equalizers to optimize speakers to the
installation.This has never been practical for the home
audiophile.This is why R.A.B.O.S.was created.R.A.B.O.S.enables
you to identify the dominant low-frequency response
characteristic of your room.Once you know the problem,
R.A.B.O.S.provides the tools needed to optimize the low-
frequency characteristics of the speakers to the room they are in,
exactly as the professional sound engineers do it.
Performing R.A.B.O.S.Tests
These instructions assume you have already installed your
Modulus subwoofer according to the information provided in the
Owner’s Guide.It is also assumed that all equipment in your
entertainment system is interconnected properly and is in good
operating condition.
Preparations
Before beginning R.A.B.O.S.tests,please check the following:
• Make sure all three R.A.B.O.S.controls
on the
Modulus subwoofer are turned fully clockwise.
• Set the R.A.B.O.S.On/Off Switch to the “On”position.
• Make sure the loudness contour (if any) on your receiver/
processor/preamp is turned off.
• Set the tone controls (Bass and Treble) to their center or
flat positions.
• Bypass all surround and effects features of your receiver/
processor/preamp or set to Stereo Bypass.
• If you are using a multichannel surround processor or receiver,
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.”
You must have a CD player in the system.A CD player remote
control is quite convenient but not essential.
For best results,it is recommended that all major furnishings
are in place and that all doors and windows in the listening area
are in their normal positions.That is,if you normally listen to
music with all doors closed,then this is how they should be
during this procedure.
Try to minimize ambient noise while running tests.Turn off all
major appliances and any air conditioning or furnace fans.These
can create significant subsonic noise that may be barely
perceptible but which can wreak havoc on low-frequency
measurements.
Critical information is highlighted with this mark:
Helpful hints are marked with this symbol:
R
OOM
A
DAPTIVE
B
ASS
O
PTIMIZATION
S
YSTEM
11
MODULUS
Power is switched on or off by pressing the button directly below
the bar-graph window.When the unit is on,one or more LEDs will
always be illuminated.The function of the LEDs is described in the
following section.
• Power-On/Low Signal: This is indicated by the illumination of
any LED on the bar graph.If the sound level in the room is below
the measurement range of the instrument,a green LED near the
bottom of the bar graph will be illuminated.
• Normal Measurements:When the sound level is within the
range of the RSLM,the green LED will be off and one of the red
LEDs in the bar graph will be illuminated,indicating the relative
sound level,in decibels (dB).
• Over-Range:If the sound level exceeds the range of the meter,
0dB through -5 will all light simultaneously.
• Low Battery:When the battery voltage is too low for accurate
measurements,an LED at the bottom of the bar graph will be
illuminated.Replace the battery.
Do not attempt measurements when this light is on.
RSLM Placement
Determine where in the room you are most likely to sit when
listening to music or watching a movie.This is where you will
want to hold the RSLM during measurements.The RSLM should
be oriented so it can be easily read and held at your seated ear
level during tests.
You must use this same position for all tests.
The RSLM can be mounted on a standard camera tripod.
This will ensure the best results.
Tracks 53–62 of the R.A.B.O.S.Test CD are test tones that can be
used for general diagnostics of your system.They are not used
for R.A.B.O.S.settings.
The R.A.B.O.S.Sound-Level Meter (RSLM)
The RSLM is a battery-operated,handheld,acoustic measurement
device specifically designed for Infinity R.A.B.O.S.On the face of
the instrument is a light-emitting diode (LED) bar graph that
indicates relative sound level.There are also indicators for
power-on,out-of-range signals and a low battery.
Track Title
1 Welcome
2 Set System Test Level
3 Set Subwoofer Test Level
4 100Hz Test
5 95Hz Test
6 90Hz Test
7 85Hz Test
8 80Hz Test
9 77Hz Test
10 72Hz Test
11 66Hz Test
12 63Hz Test
13 56Hz Test
14 52Hz Test
15 49Hz Test
16 46Hz Test
17 43Hz Test
18 40Hz Test
19 38Hz Test
20 35Hz Test
21 30Hz Test
22 26Hz Test
23 24Hz Test
24 22Hz Test
25 21Hz Test
26 20Hz Test
27 Intro to Quick Retest
28 Quick Retest 100Hz
29 Quick Retest 95Hz
30 Quick Retest 90Hz
31 Quick Retest 85Hz
Track Title
32 Quick Retest 80Hz
33 Quick Retest 77Hz
34 Quick Retest 72Hz
35 Quick Retest 66Hz
36 Quick Retest 63Hz
37 Quick Retest 56Hz
38 Quick Retest 52Hz
39 Quick Retest 49Hz
40 Quick Retest 46Hz
41 Quick Retest 43Hz
42 Quick Retest 40Hz
43 Quick Retest 38Hz
44 Quick Retest 35Hz
45 Quick Retest 30Hz
46 Quick Retest 26Hz
47 Quick Retest 24Hz
48 Quick Retest 22Hz
49 Quick Retest 21Hz
50 Quick Retest 20Hz
51 Final System Level Adjustment
52 Final Subwoofer Level Adjustment
53 Wide Band Pink Noise,Left
54 Wide Band Pink Noise,L+R
55 Wide Band Pink Noise,Right
56 Wide Band Pink Noise,L-R
57 Wide Band Pink Noise,Uncorrelated
58 1 to 4kHz Pink Noise,Left
59 1 to 4kHz Pink Noise,L+R
60 1 to 4kHz Pink Noise,Right
61 1 to 4kHz Pink Noise,Left-R
62 1 to 4kHz Pink Noise,Uncorrelated
RSLM bar-graph indications
Contents of the R.A.B.O.S.Test CD
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-13
-15
-18
U-R
Batt
R.A.B.O.S.Sound-Level Meter
FIGURE 11
FIGURE 12
On
Under-range
Measurement
In-range
Over-range
Low
Battery
MODULUS
12
Initial System-Level Setting
The following steps will set the playback level of the system to
the correct level for all tests that follow.
Turn the system volume to minimum.
Cue the R.A.B.O.S.Test CD to Track 2 and press Pause II.This
track will produce band-limited pink noise in both the left and
right channels.
Press
Play ›.With the RSLM positioned as described above,
increase the system volume until the RSLM display indicates -10dB.
See Figure 13.
RSLM indicating the correct system
level to begin tests (-10dB)
When you have completed this
adjustment,press
Pause II.
Setting the Subwoofer Test Level
Each of the following test tracks is about one minute
long.This is normally much longer than required.Press
Pause II
or advance to the next test as soon as you are ready.
This step will set the subwoofer level for measurement
purposes.The objective is to scale the subwoofer’s output to
make full use of the RSLM indicator range.Scaling is optimum
when a 0dB reading is observed on the highest peak without
triggering the over-range indication.Later,you will rebalance
the subwoofer to the main speakers.
The Modulus subwoofer should be shipped with the three
R.A.B.O.S.controls,
, and ,set to fully clockwise positions,
and all measurements should be conducted with their level
controls in this position.Confirm this setting before you begin this
test.The Gain Control should be set to the mid position (5).
Cue Track 3 and
Pause II.Track 3 continuously steps through all
subwoofer test tones for approximately 1 minute.Each tone will
play just long enough for the RSLM to give a stable reading.
To get accurate measurements,it is necessary to play
the woofers quite loud.The 0dB indication is about 94dB.At this
level,frequencies below 100Hz can cause doors,windows,
furnishings and other objects in the room to vibrate.This
frequently results in clearly audible buzzes and/or rattles that
come and go as each test tone plays.Strong buzzes not only
sound bad,they can cause measurement errors.If you hear a
buzz or rattle during this test,it is highly recommended that you
locate the source and eliminate its effects.This is actually a
valuable room-diagnostic tool.
Press
Play
›
.As Track 3 plays,watch the RSLM carefully.Watch
for peak readings.The peak reading may be no more than a brief
flash.Readjust the subwoofer’s Gain Control
until the peak
level observed is 0dB without triggering the over-range
indication.See Figure 14.
When finished,press
Pause II.
Performing Low-Frequency Measurements
Read the following instructions fully before beginning tests.
For the following steps,you will need a Measurement Template
and a pencil.
R.A.B.O.S. Measurement Template
Adjusting the subwoofer levels for a 0dB peak
Too Low
Correct
Level
Too High
FIGURE 13
FIGURE 14
FIGURE 15
13
MODULUS
Each of the following tracks produces a low-frequency test tone.
The range of these tests is from 100Hz down to 20Hz.The
frequency of each test is announced before it begins.The first
test is the highest frequency (100Hz);therefore,you will be
marking the template from right to left.Each frequency point is
listed across the bottom of the Measurement Template (this is
called the X-axis).See Figure 15 on the previous page.The
vertical scale on the left side of the template indicates relative
level,in dBs (the Y-axis).The template’s vertical scale matches
that of the RSLM bar graph.
Cue Track 4 and
Pause II.
From now on,you will want to keep your CD player’s
remote control handy.
Press
Play .As Track 4 plays,observe the level indicated on
the RSLM.
EXAMPLE:The test frequency is 100Hz and the level indicated is
-2dB.Find the intersection of 100Hz (X-axis) and -2dB (Y-axis).
Place a dot at that point.See Figure 16.
It takes a few seconds for the RSLM reading to stabilize,
especially at very low frequencies.Don’t rush.Give each test
adequate time for the meter to stabilize.
At the bottom of the bar graph is a green “ON”LED.This LED is
illuminated whenever the sound level is below the measuring
range of the RSLM.If this occurs during a test,place a dot at the
intersection of the test frequency and the bottom frame of the
template.See Figure 17.
When finished,press
Skip to advance to the next test.Repeat
the process described above for Tracks 5 through 26.
When you have completed the 23 measurements,you are ready to
analyze the data and make corrective adjustments.The completed
Measurement template will look something like the example in
Figure 18.
Now connect the dots as shown in Figure 19.
This will make interpretation of the data much easier.
▼
Locating a test point
Indicating an under-range test
Completed R.A.B.O.S.template
Test example with dots connected
▼
▼
FIGURE 16
FIGURE 17
FIGURE 18
FIGURE 19
R.A.B.O.S.Online
Now that you have obtained the data necessary to make final
adjustments,a few more calculations are required to determine
the ideal position of the three bass optimization controls.
These calculations are covered in detail,and are available
for your reference in the remaining pages of this owner’s
guide.It is recommended that you read through to get a better
understanding of the functions and benefits of R.A.B.O.S.
However,if you have access to the Internet,you may choose
to skip to “Adjusting the R.A.B.O.S.Equalizer”on page 19,and
have your settings calculated by Infinity's online R.A.B.O.S.
calculator.You can find this in the “Owner Info”section of our
Web site at www.infinitysystems.com.
What Does a Parametric Equalizer Do?
The R.A.B.O.S.system uses one band of parametric equalization
for response correction.Parametric equalizers are the most
versatile class of filters.The effect an equalizer will have on the
signal is dependent on three parameters.
Frequency:The equalizer will have maximum effect at one
frequency,usually described as the center frequency.
Level:This refers to the amount of cut (in dBs) the equalizer
is set for.
Bandwidth: Defines the range of frequencies over which the
equalizer will have an effect.On the Modulus subwoofer,this
adjustment is abbreviated as “Width.”
Only parametric equalizers allow independent adjustment of all
three parameters.
These will be explained more fully in the sections that follow.
Completing the Measurement Template
Along the bottom of the Measurement Template are three fields
where you will enter the equalizer settings needed to complete
system optimization.
These instructions are based on the example in Figure 19.
Use this tutorial to become familiar with the process.Strategies
for several other test results will be presented later.After you
have completed these three entry fields,you will be ready to
perform the adjustments,completing R.A.B.O.S.optimization.
Frequency
The frequency of the R.A.B.O.S.equalizer may be adjusted to
any one of nineteen frequencies from 20Hz to 80Hz.This defines
where you are going to apply equalization.
Width
The frequency range of the R.A.B.O.S.equalizer may be set from
5% to 50% of an octave in 21 steps.This setting defines
how much of the subwoofer’s output will be equalized.
Width is expressed as a percentage of an octave.For example,a
width setting of 25% means the equalizer will affect a frequency
band of 1/4 of an octave;1/8 of an octave above and 1/8 of an
octave below the center frequency.
The octave is a logarithmic expression.From any point
in the spectrum,one octave above or below that point is always
double or half the frequency.Therefore,one octave above 100Hz
would be 200Hz.One octave below 100Hz is 50Hz.
In the section that follows,we will discuss the use of the
Width Selector.
Effect of adjustable width
MODULUS
14
FIGURE 20
15
MODULUS
Using the Width Selector
Read the following instructions carefully.The example
presented may not look like the graph you just created.
Focus on the concepts and techniques presented.Specific
cases will be discussed later.
You will use the Measurement Template just completed and the
Width Selector to determine the correct width setting.The Width
Selector graphically depicts a single resonant peak.The peak
looks similar to a slice of a pie.See Figure 21.At the top of the
Selector is a pull tab.When you slide the tab up and down,the
width of the pie slice becomes narrower and wider,respectively.
The pointers on the sides of the button point to the bandwidth
that corresponds to the width of the slice.
Place the Width Selector over the Measurement Template,
positioning the center rivet of the Selector over the response
peak,as shown in Figure 22.Be sure to align the horizontal lines
of the Width Selector with those of the Measurement Template.
Apply pressure to the upper and lower left corners of the
Selector using the thumb and forefinger of your left hand.Now
gently slide the tab up or down until the adjustable slice most
closely fits the response data.See Figure 23.
Width Selector
Placement of the
Bandwidth Selector
Selector adjusted for
the “best fit”
FIGURE 21
FIGURE 22
FIGURE 23
16
MODULUS
The pointer on the slider will indicate the correct width setting.
Enter this number in the Width field of the Measurement Template.
In our example,the width is 12.5%.
It is not realistic to expect a perfect fit.Acoustic
measurements encompass the behavior of not only the speakers
but of the room and its contents as well.Reflected energy,
standing waves and ambient noise all add their part.Determining
the best width setting nearly always requires compromise.
Level
This setting will define the amount (level) you want to reduce the
peak,in decibels.
The R.A.B.O.S.level adjustment is limited to attenuation only,and
is adjustable from 0dB to -14dB.After optimization,the R.A.B.O.S.
equalizer will eliminate the largest low-frequency peak;therefore,
the broadband bass level can be increased without overpowering
the midrange frequencies.R.A.B.O.S.applies this compensation
automatically.
You will use the Width Selector as an aid in determining the
correct level setting.Place the Width Selector as described
above and adjust it to the correct width.Observe the first
frequency point on the high-frequency side of the peak that no
longer follows the slope of the Width Selector.In this example
this is 56Hz.Calculate the average level of the readings from
56Hz up to 100Hz;that is,10 data points in this example.
Whenever your answer has a remainder,always round down
(disregarding the negative [-]) to the next whole number.
In our example,you would enter 9 in the attenuation field.
This may not be the best method in all cases.The next section
contains several other examples.
What You Measure,What To Do
As stated earlier,it is not possible to anticipate the effect of
every possible listening environment.However,most residential
sound rooms share many characteristics,and their dimensions
fall into a range that makes some response irregularities far
more likely than others.On the following pages are examples
of what you may encounter.Following each example is a strategy
for correction.Compare your measurement results with the
following examples.Find the one that best fits your graph and
follow the instructions presented for that scenario.
Remember,when looking for a match,look at the
descriptive characteristics,not any specific frequency or level.
Each of these examples can occur at any frequency,bandwidth
and level.It is unlikely that your test results will be exactly as
depicted in these examples.
Example 1. Single Dominant Peak:
This is the most common result of speaker/room interaction.
Apply the Width Selector as demonstrated in Figure 22.Align the
center line of the Selector over the center of the peak,as shown in
Figure 22.Now adjust the Selector until you have achieved the “best
fit.”The slider now points to the correct bandwidth setting.In this
example,the frequency is 43Hz and the best-fit width is 12.5%.
Fill in the Width and Frequency fields provided on the template.
Determine the appropriate level using the technique described
earlier.In this example,-9dB would be best.Enter the level in the
field provided.
Skip to the “Adjusting the R.A.B.O.S.Equalizer”
section on page 19.
Single dominant peak
56Hz 63Hz 66Hz 72Hz 77Hz 80Hz 85Hz 90Hz 95Hz 100Hz
-9 -10 -8 -9 -10 -9 -8 -10 -10 -9 -
92 ÷ 10 = -9.2
FIGURE 24
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Infinity MODULUS Le manuel du propriétaire
- Catégorie
- Amplificateurs audio de voiture
- Taper
- Le manuel du propriétaire
dans d''autres langues
- English: Infinity MODULUS Owner's manual
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TOA BS-301W Specification Data
