Atlantic Technology System 4.5 Manuel utilisateur

System 4.5 High Performance Ultra-Compact

Home Theater Loudspeaker System

Instruction Manual

Atlantic Technology

NNOVATIVE

OME

HEATER

Covers Models 4.5 LR, 4.5 C, and 4.5 SR

343 Vanderbilt Avenue Norwood, MA 02062 (781) 762-6300 www.atlantictechnology.com

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Models 4.5 LR, 4.5 C, and 4.5 SR

YSTEM

4.5

High Performance Ultra-Compact

Home Theater Loudspeaker System

Thank you for choosing Atlantic Technology home

theater products. Your new speaker system is

precision crafted to give you years of enjoyable,

trouble free service. This manual covers the Atlantic

Technology System 4.5 series of speakers for home

theater. It will show you how to incorporate the

following System 4.5 components into your present

setup, as well as how to assemble a complete

system. The Model 4.5 PBM Subwoofer is covered in

detail in a separate manual. System 4.5 has been

optimized for use with any surround sound format

including Dolby Surround

, Dolby Pro-Logic

Dolby Digital 5.1

and DTS

digital surround

formats.

Model 4.5 LR Front Channel Speaker

The Model 4.5 LR Front Channel Speakers are two-way systems including a built-in high pass

filter at 125 Hz, intended for use with a quality subwoofer, such as the Atlantic Technology Model 4.5

PBM. Each speaker contains two 3 1/2" IMG (injection-molded graphite) woofers, and a 1" Ferrofluid

cooled silk dome tweeter using a powerful neodymium magnet, in an acoustically inert MDF cabinet.

Model 4.5 C Center Channel Speaker

It is vital to the accurate reproduction of a multi-channel soundtrack that the three front speakers have

the same sonic signature. Therefore, the Model 4.5 C Center Channel Speaker contains the same

two 3 1/2" IMG woofers, 1" Ferrofluid

cooled silk dome tweeter, and built-in 125 Hz high pass filter as

the 4.5 LR speakers. The 4.5 C is designed for use in home theater systems that use a dedicated center

channel speaker. This speaker incorporates unique compensation circuitry that allows it to be placed

directly above or below the TV screen and still provide accurate reproduction. Since up to 85% of the

movie soundtrack is reproduced through the center channel speaker, it is important that its sound be

accurate and timbre-matched to the other speakers in the system. The unique rear-mounted high

frequency control incorporated in the 4.5 C allows virtually perfect matching.

To further optimize the performance of the three front channels, all the drivers in the 4.5 LR's and

4.5 C are mounted to a solid machined aluminum plate. This mounting system eliminates undesirable

resonances and helps focus the tweeter’s sound to provide precise image placement and wide

dispersion.

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Atlantic Technology

Model 4.5 SR Surround Speaker

The Model 4.5 SR Surround Speaker is intended for use in audio/video sound systems with dedicated

surround channel speakers. Each speaker has two 3 1/2" IMG woofers, as well as two 3/4" fabric dome

tweeters which are angled and phased to produce ambience without localization. Its wide bandwidth

and unique construction makes it especially suitable for Dolby Digital and DTS applications. Please

note that there is a dedicated LEFT and RIGHT model 4.5 SR. This is clearly marked on the back of

each speaker.

Note: The 4.5 SR is not intended for use as a regular right and left front channel stereo speaker or satellite.

Its spatial performance characteristics are simply not appropriate for this purpose. In the Atlantic Technology

4.5 Series of components, the Model 4.5 LR fills this role.

Although the speakers in the Atlantic Technology System 4.5 are acoustically and cosmetically

matched to each other for best results, they may also be used with a wide variety of speakers from

other manufacturers with satisfying results.

Connecting Your System

We recommend that you connect your System 4.5 speaker systems with high quality dual conductor

stranded wire of 18 gauge or larger, for lengths up to 25 feet. Use 16 gauge dual conductor or larger for

longer runs of wire. Contact your local audio/video specialist for specific cable recommendations and

further information for special circumstances.

Warning: To prevent risk of electrical shock or damage to your equipment, always switch off the amplifier or

receiver when making connections to the speaker.

You can connect your System 4.5 speakers by using a variety of audio connectors, or you can:

1. Remove 1/2" of insulation from each wire end.

2. Twist the stranded wire together, keeping the two ends separate.

3. Place the appropriate wire through the appropriate postholes in the connectors. These holes are

revealed when you loosen the connector thumbscrew.

4. Screw down the thumbscrew tightly.

We recommend that you check your local electrical codes to make sure that you are not using an

improper connector.

It is important to observe polarity while making speaker connections:

red (+) terminals on the amplifier to red (+) on the speaker, black (-)

on the amplifier to black (-) on the speaker. Look carefully at the

wires you are using and note that one of conductors of each pair is

marked by a different color, printing, ridges, or a thread intertwined

with the wire strands. By convention, the marked wire is connected

to the red (+) terminal.

Whether your are connecting a complete System 4.5, or adding a single speaker component to your

present system, the wiring should look like the diagram in Figure 2.

Figure 1:

Gold plated

5-way binding

posts. Accepts

up to 10 guage

bare wire

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Models 4.5 LR, 4.5 C, and 4.5 SR

Figure 2:

Typical wiring

diagram for

speakers in a

home theater.

Warning: Before turning on the amplifier, be certain that no stray wire strands are touching across the two

terminals as this might damage your amplifier.

Finally, check the polarity of your front speakers by listening to some music. If the sound seems hol-

low, unusually spread out, or has weak bass, recheck your connections for proper polarity. If necessary,

reverse any out of phase connections. Only one speaker wired out of phase is usually the culprit.

Placement and Operation

Speaker/room interactions have a huge impact on the sound of the system. Moving the speakers just a

little bit can make a dramatic difference in what you hear. The ultra-compact design of System 4.5

provides you with maximum placement flexibility while creating a large, seamless, acoustically

accurate soundfield for your home theater or music system. The best placement of the speakers will

vary from room to room. Use the following placement guidelines and Figure 3 as a starting point. But

also feel free to experiment. In fact, it may be beneficial to hook up the speakers with some extra wire

and to simply drape the wire across the floor before installing the speakers permanently. This will

allow you the opportunity to move the speakers around easily so you can find the best sonic and

visual locations.

To optional

second

subwoofer

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Atlantic Technology

Figure 3:

Typical arrange-

ment for speakers in

a home theater. For

best results, place

the surround

speakers within the

shaded area. Note

that the surround

speakers are marked

Left and Right. It is

important that the

speakers be placed

correctly for proper

imaging.

Null point of surround

speaker in line with

listening position

Center channel should be within

2' of front speaker tweeter height

Surround

speaker

should be

no closer

than 2' from

the ceiling

Left surround

speaker

Right

surround

speaker

Ear level

Home Theater

Remember that the primary goal of a good Home Theater is not to make you believe that you are in a

movie theater. It’s to make you believe you are in the scene taking place on the screen. For a Home

Theater system, place your Model 4.5 LR speakers on either side of the television. The three front

channel speakers (4.5 LRs and 4.5 C) are magnetically shielded so they will not interfere with your

television picture. The left front and right front speakers should be far enough apart that you get a

good stereo image, but not so far apart that the sound seems to come directly from the speakers, dis-

tracting you from the picture. If you are using a center channel speaker, a wider separation of the left

and right front speakers is usually possible. You may chose to “toe” the LR speakers in, aiming them at

the prime listening position. This can be particularly useful if the front LR speakers are fairly far apart.

The Model 4.5 C should be placed directly above or below your television. It is important that the

speaker is centered on the screen, not off to the side. Place the speaker base so that the foot cutouts are

facing forward. Then pivot the speaker on its base, tilting it so that it points most directly at the

listening position.

Operation of the HI FREQ LEVEL Control

The HI FREQ LEVEL control will give you more or less high frequency output from

the speaker, working similarly to the treble tone control on a preamp, amp or

receiver. This allows you to compensate for overly bright soundtracks or “punch

up” a dull soundtrack. Turning this control clockwise increases the high frequency

level; turning it counterclockwise reduces the high frequency level. The HI FREQ

LEVEL control also will allow you to adjust the overall sonic balance of the 4.5 C to

more closely match the LR speakers, even though the 4.5 C is placed directly above

or below the TV screen.

Figure 4:

Hi-Freq Level

Control on rear

panel of the

Model 4.5 C.

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Models 4.5 LR, 4.5 C, and 4.5 SR

Note: Some surround sound decoders and receivers offer a choice of “normal” or “wide-band” modes for the

center channel. The Model 4.5 C was designed to be used in the “normal” mode. Additionally, some discrete

digital Home Theater systems allow you to select between “Small” and “Large” speakers throughout the

system. Since System 4.5 has been designed only to work with an active subwoofer, you should usually set all

the speaker positions to “Small.” However, if you are using the 4.5 PBM subwoofer, please follow the

connection instructions contained in the subwoofer manual.

Surround Effects

The 4.5 SR’s size and shape allows greater flexibility in placement than most conventional surround

loudspeakers. Due to their dipole design’s spatial characteristics, it is possible to place the speakers

virtually anywhere, but usually the best location is straight out to the sides of, or slightly behind the

primary listening area, approximately 1-2 feet above ear level.

Note: The surround speakers are intended to re-create the ambient sounds taking place in the movie scene.

Throughout most of a movie or TV program you may not be directly aware of the surround speakers presence.

The signals they receive are mostly subtle sounds that should make you believe you’re in the movie.

The orientation of the 4.5 SR’s is important to the proper generation of the involving and diffuse

surround effect. Mount each speaker on the wall or shelf so that the “direct” soundfield is aimed

toward the front of the room, and the “ambient” soundfield is directed toward the rear. To insure this

orientation, make sure that the RIGHT speaker is on the right side wall of the room, and the LEFT

speaker is on the left side wall of the room. They are marked RIGHT and LEFT on the back.

Music Only System (Model 4.5 LR with subwoofer only)

If you are setting up a music only system, begin with these general guidelines:

●

The distance between your speakers should be approximately one-half their distance from your

favorite listening position.

●

Point the front of the speakers straight at you to achieve the most precise imaging. You will also

receive the maximum amount of direct radiated high frequency energy. If you have a “bright” or

“hard” sounding room environment aiming the speakers straight out into the room (or just

aiming them partially towards you) may make for a more natural and pleasing sonic balance.

●

The distance from each speaker to its three closest room surfaces should be different.

●

In most rooms, you should not place your speakers in the corners.

The goal is to reproduce accurate musical timbre, and natural sound. Additionally, a well set-up stereo

pair of speakers will create excellent imaging and a cohesive representation of the soundstage.

Placement in the room and your listening position have an enormous impact on the ultimate sound

you will achieve from your system. The most important thing is to be creative! Try placing your

speakers along the long wall instead of the short one. Toe the speakers in or point them straight ahead.

Pull them away from the wall or push them close. Don't be timid. You’ll find that moving your

speakers, even a few inches, can dramatically change and possibly improve their sound.

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Atlantic Technology

Mounting

The 4.5 LR and the 4.5 SR speakers can be mounted in a variety of ways:

On speaker stands: Atlantic Technology speaker stands provide an ideal height (29" above the floor)

for most rooms. They are available in black or white. Speaker stands from other manufacturers may be

used, but should be of approximately the same height (29" to the base of the speaker).

On the wall: To mount your speakers on a wall, we have installed metal key-hole brackets on the

back of the 4.5 LR and 4.5 SR speakers. Be sure to use a strong screw whose head and shaft will fit

within the keyhole opening and slot. Also be sure to drive the screw well into a stud or use a mounting

device (such as a molly-bolt) that is capable of holding the weight of the speaker. Never simply drive a

nail or screw into a sheet rock or other wall materials. Always follow the above guidelines for safe

speaker mounting.

For greatest flexibility, use pivoting ball-and-socket wall brackets of suitable weight rating (e.g.,

Omnimount 25 Series, Vogel, etc.) usually available from your local audio/video retailer.

On a bookshelf: Adhesive rubber feet are included.

In the wall: An optional Atlantic Technology in-wall mounting kit is available. It includes all the

necessary hardware and trim to install a pair of 4.5 SR speakers recessed partially in a standard wall.

Please contact your local Atlantic Technology dealer for further information.

Listening Levels and Power Handling – IMPORTANT!

The power recommendation for these speaker components assumes that you will not operate your

amplifier/receiver in a way that produces distortion. Even rugged speakers like System 4.5 can be

damaged by a moderately powered system driven beyond its intended capacity. The harsh amplifier

clipping that occurs in this situation will cause damage to the speaker system. This type of damage is

easily identifiable through examination of the damaged speaker’s voice coil and is not covered by the

warranty. The System 4.5 will play very loudly when provided with enough clean power to do so.

Again, consult your dealer or Atlantic Technology for additional information.

Care and Feeding of Your Speakers

Clean your speaker cabinets using a soft cloth moistened with a mild, non-abrasive glass cleaner being

careful not to wet the edges of the cabinet. Also, be careful not to get any cleaning fluids on the driver

cones or domes. It may be best to dampen the cloth with the cleaner and then wipe the speakers. Use a

soft cloth, but do not use any paper products, because no matter how soft they may feel, they will

scratch the finish. After carefully removing the grilles from the speakers, clean them with a quick pass

from a vacuum cleaner with a brush attachment. This should remove any dust accumulation. Avoid

placing your speakers in direct sunlight or near a source of heat that may, over time, damage the

finish.

Important: Save Your Boxes! If possible, save the cartons, packing pieces, and plastic bags that came

with your speakers. They will be useful in case you move or have to ship your loudspeakers for any reason. In

any case, save all packing materials until you are certain that the systems have suffered no damage in

shipment. If you find such damage, either visible or internal, contact your dealer immediately for the proper

return procedure.

010-104.5

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For Future Reference

Record your speaker(s) serial number(s) and date of purchase here:

Model Number Serial Number Date of Purchase

The serial number is found on the back of the speaker near the connecting terminals.

System 4.5 Specifications

Model

4.5 LR 4.5 C 4.5 SR

Type Sealed-box, 2-way Sealed-box, 2-way, w/ High Frequency control Sealed-box, spatially-enhanced

surround speaker

Drivers (2) 3-1/2" IMG woofers (2) 3-1/2" IMG woofers (2) 3-1/2" IMG woofers

(1) 1" silk dome tweeter (1) 1" silk dome tweeter (2) 3/4" silk dome tweeters

Frequency 125Hz – 20kHz 125Hz – 20kHz 125Hz – 20kHz

Response (±3dB)

Nominal 8Ω8Ω8Ω

Impedance

Crossover 3.5kHz 3.5kHz 3.5kHz

Frequency

Sensitivity 88dB 88dB 88dB

Recommended 10 – 125 Watts 10 – 125 Watts 10 – 125 Watts

Amplifier Power

Magnetic Shielding Yes Yes No

Size (W x H x D) 4.53 x 10.43 x 6.3in 10.43 x 5.20 x 6.3in with base 8.66 x 7.87 x 4.92in

115 x 265 x 160mm 265 x 132 x 160mm with base 220 x 200 x 125mm

Weight (ea., unpacked) 6.5lbs; 2.8kg 6.7lbs; 3.04kg w/base 10.5lbs; 2.49kg

Specifications are those in effect at the time of printing. Atlantic Technology reserves the right to change specifications or appearance at any time without notice.

Dolby Digital, AC-3, 5.1, Dolby Stereo and Dolby Pro Logic are trademarks of Dolby Laboratories Licensing Corporation. DTS is a registered trademark of DTS Technology.

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