Atlantic Technology AT-1 User Manual
AT- 1
High Performance Loudspeaker
with H-PAS™ Technology
Instruction Manual
2
Table of Contents
AT-1 High Performance Loudspeaker with H-PAS™ Technology
Table of Contents
2 Introduction
3 Unpacking the Speakers
3 Attaching the Feet
3 Attaching the Grilles
3 Glass Tops
4 Placement
4 Using the AT-1 in a 2-channel Music System
4 Using the AT-1 in a Home Theater System
6 Connecting Your Speakers
6 Conventional Connection
6 Bi-amp Connection
6 Wire Management System
7 System Wiring
8 High Frequency Energy Control
9 Caring for Your Speakers
9 Specifications
AT - 1
High Performance Loudspeaker with
H-PAS™ Technology
Thank you for choosing Atlantic Technology products. Your new speaker has
been precision-crafted to give you years of enjoyable, trouble-free service.
This manual covers the Atlantic Technology AT-1 speaker. It will show you
how to incorporate these speakers into your present setup, as well as how
to assemble a complete music or home theater system from them. The AT-1
can be used with all current and past sound formats including Stereo, all
Dolby and DTS formats, DVD-Audio and SACD Audio.
Introduction
The Model AT-1 is a 2-way system of extraordinarily high performance
intended for use in a top-quality music or home theater system. Its patentpending H-PAS™ bass technology enables the AT-1 to deliver powerful low
bass performance (-3 dB @ 29 Hz) not previously achievable with comparably-sized drivers in similar-sized enclosures.
Each speaker contains two GLH (Graphite Loaded Homopolymer) 5 ¼"
(135mm) woofers and an advanced 1
Resonance silk dome tweeter with an integral back chamber/heatsink. The
drivers are configured in an M-T-M array (midrange-tweeter-midrange
alignment). This vertical arrangement of drivers provides wide left-to-right
coverage of sound while limiting the floor and ceiling reflections that can
color the sound. These components are mounted in an acoustically inert
MDF enclosure, with special proprietary internal bracing, called CDFF™
(Cross Design Free Flow). This bracing makes the enclosure extremely
rigid, while perfectly maintaining the internal airflow that is critical to its
performance.
1
⁄8" (28mm) ferrofluid-cooled, Low
For Future Reference
Record the serial number and date of purchase for each speaker here. The serial number
is found on the speaker terminal panel on the back of the enclosure.
Serial Number
Serial Number
Date of Purchase
The contents of this manual are Copyright © 2010 by Atlantic Technology International,
Corp., and may not be duplicated or reproduced by any means, whether physical, electronic
or otherwise without prior written consent from Atlantic Technology International, Corp.
Atlantic Technology and the Atlantic Technology logo are registered trademarks of Atlantic
Technology International, Corp.
Specifications are those in effect at the time of printing. Atlantic Technology International,
Corp. reserves the right to change specifications or designs at any time without notice
without obligation to modify existing units.
IMPORTANT:
please take a few moments to read all of this booklet. It has many
helpful tips and ideas on properly setting up and using your system.
We promise that if you take the time to read and follow these tips
you’ll get better system performance and more enjoyment.
Although it may seem like asking for driving directions,
Instruction Manual
Unpacking and Assembly
3
Unpacking the Speakers
Use care when unpacking the speakers. Since the grilles are packed off the
speakers, be particularly careful of the driver elements as you unpack and
move the speakers. Remember to keep the original boxes and packing material, in the unlikely event the speakers need servicing, or if you move.
Attaching the Feet
The cast aluminum feet with spikes are shipped unattached to the speaker.
We recommend you attach the feet before proceeding to any other aspect
of setup and installation.
Attach the feet to the bottom of the speaker cabinet as shown. The spikes
can be adjusted to level the speaker. Circular metal discs are provided to
protect hardwood floors.
Attaching the Grilles
The included metal grilles are held to the front of the enclosures with powerful neodymium magnets. There are depressions on the back of the grille that
the magnets fit into. Once the speakers are in their final position, remove
the grille from its protective plastic bag and carefully position it over the
magnets on the baffle.
Move them together slowly and when you get close enough, the magnets
will draw the grille in and hold it tight. Be careful not to get your fingers
caught between the grille and the cabinet.
Figure 2
Installing the glass top
Figure 3
AT-1 High-performance
loudspeaker
Glass Tops
Decorative smoked glass tops are provided for the AT-1 to complete its
elegant appearance. Attach the four self-adhesive rubber pads to the top of
the cabinet as shown to prevent vibration and place the glass on top of the
cabinet with the bevel towards the front. (See figure 2)
Figure 1
Attaching the feet
Attach feet to
threaded inserts in
bottom of cabinet
with supplied screws.
Screw tips into
foot. Adjust to
level speaker.
Optional tip
"toes" protect
hardwood floors.
4
Left Right
Placement
Placement
AT-1 High Performance Loudspeaker with H-PAS™ Technology
Speaker/room interactions have a huge impact on the sound of the system.
Moving the speakers just a little can make a dramatic difference in what you
hear. Remember that the best acoustic placement of the speakers will vary
from room to room. Use the following placement guidelines 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.
Using the AT-1 in a 2-channel Music System
When using the AT-1 as a 2-channel music speaker (in a “stereo” system),
place the speakers approximately 6-10 feet apart, so the distance between
the speakers is roughly equal to the distance from the speakers to the listening position. (See figure 4) Begin with the AT-1 about 1 foot away from
the wall behind it. Moving it closer to the wall will increase the apparent
bass balance; pulling them farther away will yield a somewhat “leaner”
bass balance. Experiment with the positioning to achieve the most satisfying balance in your room.
The AT-1 has very wide horizontal dispersion, due to its Low Resonance
Tweeter (LRT™) design and low woofer-to-tweeter crossover frequency.
Therefore, it’s not necessary to “toe in” the speakers as one ordinarily does
with conventional speakers. However, this is also a matter of individual
preference, so again we encourage you to experiment and find the degree
of sonic imaging precision that you find most pleasing.
Using the AT-1 in a Home Theater System
The AT-1 works extremely well as part of a home theater system. In such
a system, place the AT-1’s on either side of the television. The left and right
front speakers should be far enough apart (6 to 10 feet, 2-3 meters, is usually best) that you get a good stereo “image” when they are playing alone,
but not so far apart that the sound seems to be disembodied from the TV,
distracting you from the picture.
Like all Atlantic Technology speakers, the AT-1 is tonally “voiced” to mix and
match with our other models. The 4400 C or 6200e C both make excellent center channel speaker companions to the AT-1 LRs in a home theater system.
When using a center channel speaker in a home theater system, a wider
separation of the left and right front speakers is usually possible than in
a conventional 2-channel stereo system. Therefore, you may choose to toe
in the AT-1 LR speakers slightly, aiming them towards the prime listening
position. (See figure opposite)
IMPORTANT:
tweeters at approximately the same height (within about 18” of each
other) and aimed at ear level when seated. This is because we’ve
designed the alignment of the drivers on the front panel to limit the
vertical spread of the mid and high frequencies, thereby reducing the
floor and ceiling reflections that can adversely affect sound quality.
The AT-1’s driver alignment provides an enhanced horizontal spread of
the sound, making for a much better sound experience for a group of
listeners and reducing the need to sit in a precise “sweet spot.”
Try to keep the AT-1’s and Center channel speaker’s
Figure 4
2-channel music configuration
Setting Bass Management
Even though the AT-1 delivers strong, deep bass response on its own, it is
nonetheless desirable to use a powered subwoofer in a home theater system
for the following reasons:
1. The bass level of the powered subwoofer is controllable by the
receiver’s remote control. This is an extremely important feature to
being able to “dial in” a satisfying bass level for your home theater
system from your listening chair.
2. When employing AT-1 speakers (along with a powered subwoofer)
in a theater system, set your receiver’s setup menu to “Subwoofer—
Yes,” and set your front speaker configuration to “Large” or “Full
Range” (depending on how your receiver labels it). This will
effectively give you three subwoofers in your home theater system,
all residing in different physical locations throughout your listening
room. Not only will having three subwoofers give you a higher level
of undistorted, high-impact bass in your system, having them at
different physical locations will randomize and smooth out the
bass modes and standing waves in the room, resulting in a more
uniform bass response with fewer room-caused ‘hot spots’ and
‘cancellations.’
Follow your receiver and powered subwoofer manufacturers’ recommendations for bass crossover setting and subwoofer placement. Generally, it’s best
to set the receiver’s subwoofer crossover no higher than 80 Hz, in order to
maintain non-localizability of the stand-alone powered sub.
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