Atlantic Technology 451-LR Owners manual
System 450 THX® Reference THX
Home Theater Loudspeaker System
Instruction Manual
Covers Models 451 LR, 453 C, and 454 SR
Atlantic Technology
I
NNOVATIVE
343 Vanderbilt Avenue Norwood, MA 02062 (781) 762-6300
H
OME
T
HEATER
®
Models 451 LR, 453 C, and 454 SR
S
YSTEM
Reference THX Home Theater Loudspeaker System
Congratulations on your purchase of the Atlantic Technology System 450 THX loudspeaker system.
With proper care, your new speaker system will provide many years of trouble-free, high quality sound
reproduction.
The System 450 THX was designed to provide accurate, uncompromised reproduction of high fidelity
music and movie soundtracks. Nothing was spared in the development of the speaker components and
cabinetry, to provide superior performance, while maintaining an elegant, compact design that is
easily integrated into the home.
What Is Home THX?
originally intended. Two basic requirements were identified:
1. A need to correct the audible tonal and spatial errors caused by the reproduction of movie
soundtracks designed for playback in large theaters in the smaller environment of the home.
2. A need to more accurately reproduce the complex and competing soundfields present in multichannel soundtracks.
Atlantic Technology
®
450 THX
A Home THX audio system is the ultimate in sound for multi-channel home
theater systems. The system incorporates a series of patented electronic and
loudspeaker developments designed to reproduce all multi-channel sources
accurately in the home environment. The driving force behind the creation of
Home THX was the observation that, in the home environment, conventional
audio components could not accurately reproduce soundtracks as they were
Why THX Loudspeakers?
Conventional high fidelity loudspeakers, even very expensive ones, are not ideally
suited to the demands of multi-channel soundtracks. The Atlantic Technology System 450 THX
is ideally suited to accurately reproduce high fidelity music and multi-channel sound. Here’s why:
451 LR/453 C Front and Center Speakers
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Wide horizontal dispersion improves coverage of the listening area.
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Focused vertical directivity improves frontal localization and intelligibility.
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Full dynamic range and frequency response
454 SR Surround Speakers
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Diffuse radiation enhances envelopment and spaciousness.
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Smooth power response matches the tonal character of the front and center channels.
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Full dynamic range and frequency response for digital surround applications.
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Models 451 LR, 453 C, and 454 SR
Atlantic Technology
®
452 PBM Subwoofer
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High output level reproduces full dynamic impact (110dB).
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Smooth in-room response down to 20Hz.
A Word About Digital Surround Technologies and THX
It is important to remember that THX technologies work in conjunction with whatever processing
technology it is paired. THX, on its own, is not a decoder or processor. It enhances and adapts the
surround sound processor it is combined with to more accurately reproduce movie soundtracks in the
home environment.
The new digital surround technologies, such as Dolby Digital (AC-3) and DTS, offer dramatic
improvements in channel separation and dynamic range over conventional multi-channel analog
matrix formats such as Dolby Surround and Dolby Pro Logic. THX sound systems, with their
outstanding dynamic, spatial, and tonal performance, are ideally suited to convey the benefits of
digital multi-channel formats. THX technologies will continue to be essential for the accurate
reproduction of all multi-channel sources, both now, and in the future.
Connection
We recommend that you connect your new System 450 THX speaker components using high quality
wire of 16 gauge or larger. There are many respected manufacturers in the audio industry that
specialize in speaker wire and interconnect cables suitable for your new system. We recommend that
you consult your local audio/video specialist for more specific information.
Warning: To prevent risk of electrical shock or damage to your equipment, always unplug all component AC
cords before proceeding with speaker and component connections! The last step in wiring your system is
plugging in the AC cords!
You can connect your System 450 THX speakers by using a variety of connectors, or by removing 1/2"
of insulation from each wire end, twisting the strands of wire together, placing the wire through one of
the post holes and screwing down the nut tightly. We recommend that you check your local electrical
codes to make sure you are not using an improper connector.
Figure 1:
Gold plated
5-way binding
posts. Accepts
up to 10 guage
bare wire
one speaker or subwoofer to your present system, the wiring should usually look like the diagram in
Figure 2. When installing an Atlantic Technology subwoofer into your system, refer to the subwoofer’s
instruction manual for other wiring options. Before turning on the amplifier, be certain that no stray
wire strands are touching across the two terminals as this might damage your amplifier.
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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 the wires in each pair is
marked by either 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 450 THX, or adding
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