Infinity Omega Manuel utilisateur

Owner’s Manual

Part #9301297-001

OMEGA

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Introduction..............................................................................................................................3

About This Product..............................................................................................................3

Unpacking ...............................................................................................................................3

Associated Components............................................................................................................4

Installation of Spikes.................................................................................................................4

Connections Using a Stereo Amplifier...................................................................................5–6

Connection for Bi-Amp Operation............................................................................................7

Bi-Wiring ..................................................................................................................................8

Positioning Your Speaker ....................................................................................................9–11

Room Acoustics, Speaker Positioning and Tonal Balance ..................................................12–13

Adjusting Your EMIT™ Level .................................................................................................14

Adjusting Your EMIM™ Level ................................................................................................14

Setting the Audio System Controls..........................................................................................14

Acoustic Feedback ..................................................................................................................15

Care of Your Speakers.............................................................................................................15

In Case of Trouble With Your Speakers...................................................................................15

Specifications ..........................................................................................................................16

ABLE OF

ONTENTS

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Omega

– Owner’s Manual ◆

INTRODUCTION

You have invested in one of the finest audio/video speakers available. Your

Infinity Omega speaker employs new technology in driver, crossover and

cabinet construction, which places it at the forefront of current speaker design.

As with any high-quality product, special care must be taken to install and

operate your new speaker. It is for this reason we suggest you read this manual

carefully from cover to cover prior to installation.

UNPACKING

Upon opening the carton, inspect the speaker carefully for any sign of transit

damage. If there is damage, immediately call your dealer or the trucking firm

that made the delivery. Do not delay in reporting the damage because the

longer you wait, the more difficult it will become to file a claim. We suggest

that you fold the carton flat and store it for future use.

BOUT

HIS

RODUCT

...

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◆Omega – Owner’s Manual

ASSOCIATED COMPONENTS

Your Infinity Omega speaker is an extraordinary, highly musical system. Like

all loudspeakers, it will reproduce distortion as well as music. For this reason,

the choice of associated audio components is critical and should be made with

care. If you are replacing existing speakers with an Infinity Omega System,

there should be an audible improvement in sonic quality, assuming your other

components are at least on a par with the Omega speaker in terms of low dis-

tortion, phase linearity, frequency response and so on.

If no improvement is heard, or if the sound deteriorates, it is possible that one

(or more) of your existing components is of a lower standard than your new

Infinity speaker. When a speaker system is exceptionally revealing, musical

colorations and other forms of distortion become more noticeable because

these aberrations are no longer masked by the speaker. Here are some sugges-

tions that will prove useful in obtaining a well-balanced audio system:

• Employ an amplifier with as much power (current capability into an imped-

ance of 4 ohms) as possible. Since quality speakers work best when driven by

high current, the choice of an amplifier with a strong, adequate power supply

and a heavy-duty and rugged output stage generally results in cleaner, better-

defined bass response. And, while low distortion, excellent phase characteris-

tics and low noise are all extremely important performance parameters, suffi-

cient power into a low impedance load (4 ohms or lower) on a continuous

basis is equally important.

• Another consideration is that a lower power amplifier operating at its maxi-

mum power output can damage a speaker more quickly that a high power

amplifier playing at loud sound levels. This occurs because many amplifiers

“clip” their output very “hard” when overdriven, creating high-frequency dis-

tortion, which can cause the voice coil of a tweeter to heat and eventually fail.

Always choose an amplifier with high power. Your authorized Infinity dealer

can best answer your questions and make recommendations.

• The Omega speaker is extremely revealing and will quickly identify sonic

anomalies within the listening system. Poor-quality speaker cables and compo-

nent interconnects can add harshness, detract from spaciousness and reduce

airiness surrounding instruments and voice.

INSTALLATION OF SPIKES

Please note that the speakers stand on spiked feet, which come with plastic

caps installed to prevent injury to you and your belongings. The loudspeakers

will perform best when the spikes make direct contact with the floor. If you

wish to protect hardwood or other solid floors, leave the plastic caps in place.

To level the speaker and to provide firm support at each corner on uneven

floors, you can adjust the height of each foot by screwing it in or out of the

bottom of the speaker. When installing the spikes, be very careful not to allow their

sharp points to injure you or anyone helping you.

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Omega – Owner’s Manual ◆

CONNECTIONS USING A STEREO AMPLIFIER

Always turn off the power of your entire system before making connections to

your speaker. Connect each speaker to your amplifier’s output terminals using

the best wire you can obtain. The choice of speaker connecting wire is

extremely important, especially when using speakers as sonically revealing as

Infinity Omega. If inferior wire is used, sonic quality will suffer and the degra-

dation of sound will be readily audible. For best results, do not use wire that is

thinner than 16 gauge. NOTE: the lower the gauge number (16, 14, 12, etc.),

the heavier the wire. Although gauge alone does not reveal the ultimate sonic

quality of wire, it represents a good starting point, especially if you are not

using a name-brand speaker connecting cable. Consult your dealer if you are

not certain which type of wire will make your Infinity speaker sound best.

When using regular lamp cord, look for ridges or different colored insulation

to differentiate polarity. If there is a ridge on the outer insulation, use the ridge

for positive (+) and the wire without the ridge for negative (-). If the insulation

wrapped around one wire is red, use it for positive. Use white (or whatever the

other color may be) for negative. (See figure 1.)

It is important to connect your speakers in phase (which means that all indi-

vidual drivers are moving in and out in the same direction and at the same

time) in order to obtain the best localization of instruments and voice as well

as the deepest, most natural bass. If a speaker is out of phase, the drivers in

one channel will move in while the other channel will move out. This condi-

tion invariably results in sonic problems and must be avoided.

DIFFERENT COLOR

CONDUCTORS RIDGE, STRIPE OR

PRINTING, ONE LEAD ROUGH OR COLORED

INSULATION, ONE LEAD

L.F.

OMEGA

EMIM

EMIT +

flat

NORTHRIDGE, CALIFORNIA, USA

– +

GOLD-PLATED

SHORTING STRAP

Figure 1.

Some examples of polarity coding on

speaker cables.

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◆Omega – Owner’s Manual

Figure 2.

Speaker connection.

Using one length of speaker connecting wire, connect the RIGHT speaker to

your amplifier’s (or receiver’s) RIGHT channel output terminals. Be sure that

strands of the wire do not touch the ground terminal (and be sure to observe

polarity). Even a thin stray wire can cause distortion in the system that would

be very difficult to trace. Speaker Positive should be connected to amplifier

Positive and speaker Negative to amplifier Negative. Connect the LEFT speaker

to your amplifier’s LEFT channel output terminals in a similar manner. (See fig-

ure 2.)

L.F.

OMEGA

EMIM AMPLIFIER

LEFT

SPEAKER

LEFT

– + RIGHT

– +

EMIT +

flat

NORTHRIDGE, CALIFORNIA, USA

– +

CONNECTIONS USING ASTEREO AMPLIFIER

(Continued)

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Omega – Owner’s Manual ◆

Figure 3.

Connecting the speaker for

bi-amp operation.

CONNECTION FOR BI-AMP OPERATION

Your Infinity Omega speakers permit you to employ two power amplifiers in a

bi-amp configuration. One amplifier feeds the woofer (the signal passes

through the speaker’s crossover network to feed the woofer) and the other

amplifier drives the remainder of the speaker system. This arrangement gener-

ally results in the purest and most open sound obtainable from the speaker.

To connect your speaker to two amplifiers, merely remove the two gold-plated

straps (which connect the bass and higher frequency section of the crossover

network together for use with a single power amplifier) and connect one

amplifier to the bass terminals and the other amplifier to the tweeter/midrange

terminals. Observe polarity as detailed in the previous section. (See figure 3.)

DO NOT ATTEMPT TO EMPLOY TWO SEPARATE AMPLIFIERS WITH-

OUT FIRST REMOVING THE SHORTING STRAPS ON THE REAR OF THE

SPEAKER. DO NOT REMOVE THE SHORTING STRAPS WHEN USING

ONLY A SINGLE POWER AMPLIFIER (except when bi-wiring; refer to the

next section).

If your amplifiers are not equal in power, always use the amplifier with the

higher power (or greater current capability) to drive the woofers. When using

two different amplifiers, it is recommended that at least one of the amplifiers

has a level control that will permit you to set the level of one of the amplifiers

to balance the other, resulting in equal output feeding the woofers and

midrange/tweeter sections.

L.F.

OMEGA

EMIM AMPLIFIER

LEFT

– + RIGHT

– +

EMIT +

flat

NORTHRIDGE, CALIFORNIA, USA

AMPLIFIER

LEFT

– + RIGHT

– +

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◆ Omega – Owner’s Manual

BI-WIRING

Many audiophiles recommend using two connecting wires instead of one

because two wires share current through a greater conducting area. If you wish

to bi-wire your Omega speaker with a single power amplifier, remove the two

shorting straps on the rear of the speaker that separate the woofer and

midrange/tweeter sections of the crossover network. Two parallel speaker wires

are connected to the amplifier’s output (for each channel) and the other ends

of the wires are connected to the woofer and midrange/tweeter sections of the

speaker. (See figure 4.)

L.F.

OMEGA

EMIM AMPLIFIER

LEFT

– + RIGHT

– +

EMIT +

flat

NORTHRIDGE, CALIFORNIA, USA

– +

Figure 4.

Connecting the speaker for

bi-wire operation.

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Omega – Owner’s Manual ◆

POSITIONING YOUR SPEAKERS

Locating your Omega speakers in the proper position within your listening

room is of primary importance if you wish to obtain the best possible perfor-

mance from your audio system. Depending on room size and acoustics, mov-

ing the speakers as little as an inch (2.5cm) forward, rearward or sideways can

result in noticeable sonic differences. We urge you, therefore, to experiment

with placement until your speakers deliver their full musical potential.

As a useful starting point for best stereo imaging, place your speakers at least

seven feet (2 meters) apart. Try to locate the speakers as far away as possible

from walls and corners of the room to reduce reflections, which generally

result in sonic anomalies. Our experience has shown that speaker placement

too close to a wall or corner can create hardness, smearing of the sound, lack

of bass detail and, at times, other forms of sonic distortion that reduce clarity

and change the harmonic structure of music. Often as not, these sonic anom-

alies are blamed on the speakers but are really due to poor room placement.

We cannot stress too strongly the importance of room placement and the role

it plays in achieving excellent musical balance. (See figure 5.)

When the speakers are moved inward (toward each other) this generally

achieves better focus of instruments and vocalists; however, moving the

speakers too close together can reduce the front-to-rear stage effect and you

may need to experiment with the trade-off between focus and imaging. If your

listening room is larger than average and your listening position is relatively

far from the speakers, wider placement of the speakers may be required

(approximately 10 feet or 3 meters apart). Try angling the speakers inward for

better projection of midrange and high frequencies; however, do not angle the

speakers too sharply because this may reduce stereo imaging as well as front-

to-rear depth. The exact angle of toe-in must be determined by careful experi-

mentation. There is no formula to follow because rooms differ in acoustics and

the listener’s position may vary considerably. (See figure 6 on page 12.)

3 FT.(1M)

3 FT.

(1M)

7 – 10 FT.

(2 – 3M)

Figure 5.

Suggested starting placement

for Omega speakers.

OSITION

ITHIN

OOM

ILL

TRONGLY

NFLUENCE

ERFORMANCE

...

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◆ Omega – Owner’s Manual

Figure 6.

Angling Omega speakers.

Figure 7.

Sound is more direct when midrange

and tweeter reach

the listener at ear level.

Tilt speaker forward to direct

sound at ear level.

POSITIONING YOUR SPEAKERS (Continued)

The toe-in angle for each speaker should be exactly the same for best sonic

results. This can be done effectively by eye or by using a tape measure or

straight edge to measure the amount of toe-in from a forward firing position.

Aligning your speakers with a slight tilt either forward or rearward will help

“tune” them to the room and to your listening position. If your sitting position

aligns your ears on a plane that is lower than the midrange and tweeter, you

may wish to tilt the speakers downward so the acoustic output from the speak-

ers reaches your ears on a direct plane. If you are seated in a position that

directs the sound toward your chest or shoulders, it may be necessary to tilt

the speakers slightly rearward so the acoustic output from the midrange and

tweeters reaches your ears on a direct plane. Toe-in, tilting and moving the

speakers closer and further from walls and corners are all part of the system

tuning procedure. Don’t be afraid to experiment as this will result in the best

sound. If a specific location yields satisfying results and you wish to continue

to experiment with speaker placement, mark the ideal location so you can

always return to it.

When installing your speakers, be very careful to keep them on the same plane

(exactly the same distance from the front wall). It is advisable to use a tape

measure or string to measure the exact distance the speakers are located from

the front wall. (See figure 7.)

3 FEET

(1 METER)

LISTENER’S

POSITION

FRONT OF SPEAKERS

ON SAME PLANE AND

AT SAME ANGLE

ANGLE SPEAKERS

TOWARDS LISTENING

POSITION

LISTENER’S

POSITION

ANGLES FOR

BOTH SPEAKERS

MUST BE

IDENTICAL

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