Atlantic Technology IC, IC-6.2, IC-6.3, IC-6HT, IC-6 SLM Instruction Manual
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IC
IC-6.2,IC-6.3,IC-6HT,and IC-6 SLM
IC-8.2,IC-8.3
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Thin Bezel Ceiling Speakers
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SL M
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Dipole/Bipole Operation of 8.3 and 6.3
Thin Bezel
Thin Bezel
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Instruction Manual
Speaker Placement
Features
Polypropylene Cones: Polypropylene has physical properties that
make it ideal for loudspeaker drivers and consequently is found in
many of the world’s finest loudspeakers. Its combination of stiffness
and strength-to-weight ratio means that it results in a more precise
and defined sound reproduction.
Soft-dome tweeters: Another feature often found in the world’s fin-
est loudspeakers. The low mass of treated cloth and its self-damping
properties deliver more accurate sound with less distortion.
Adjustable tweeters: The tweeters in your Atlantic Technology loud-
speakers are mounted in an orbital socket and can be adjusted by gently
pressing on their edge. This adjustment allows for directing the sound
when the speaker may need to be offset from an ideal listening position
due to aesthetic or physical reasons.
Stable tweeter bridge mounting: The tweeters in our ceiling loud-
speakers are mounted on an extremely stable bridge rather than on a
central pole as found in many other designs. This mounting method
is less prone to resonance and vibration than a central “pole” tweeter
mount, resulting in cleaner sound, especially at high listening levels..
Bipole/Dipole Switch (6.3 and 8.3 only): This switch allows these
dual-tweeter speakers to operate as highly-effective diffuse surround
speakers in a home-theater system when their tweeters are out of phase
in the “Dipole” position.
Cut-out template: Atlantic Technology loudspeakers come with a cut-
out template to allow the installer to accurately measure the hole to be
cut out in the wall or ceiling surface resulting in an easier installation
process.
Pre-construction bracket: All Atlantic Technolog y loudspeakers have
an optional plastic pre-construction bracket. Their use is optional, but
can be very helpful to the installation process at the time the plasterboard is about to be attached to the wall/ceiling. Therefore they would
be used only during more extensive renovations and not when retrofitting the loudspeakers into an existing surface.
Paintable Grilles: Your Atlantic Technology loudspeakers come with
steel grilles pre-painted in white. These may be painted if required.
Important: Please refer to the section later in this manual on painting
grilles before you attempt any painting.
Angled Woofer (6 HT only): The woofer in the IC-6 HT is mounted
in an angled housing for precise coverage of the listening area.
High Frequency Switch (6 HT only): The IC-6 HT loudspeaker is fitted
with a high frequency (tweeter) switch. This enables you to adjust the
sound of the speaker to suit your personal listening preferences and
the acoustics of the room in which you are installing them.
Boundary Compensation Switch (6 HT only): The IC-6 HT has a
Boundary Compensation switch that compensates for the unwanted
added mid-bass response that results when a ceiling speaker is mounted
very close (within a foot or so) to a nearby wall (“Boundary”). Engaging
this switch “on” returns the speaker’s response to normal and improves
the sound.
Speaker Placement
The pivoting tweeters in Atlantic Technology loudspeakers are able to compensate for unusual placements of the speakers themselves. However, the
ideal positioning of the speakers should be at roughly equal distances from
the intended listening area and along a common wall. This helps to ensure
the best stereo effect.
Naturally, intended listening positions are rarely static and they may vary
considerably within a room. In these circumstances, you can confidently
compromise on the ideal location and use the pivoting tweeter to assist
without impacting your listening pleasure.
2-Channel Audio Placement
In standard two channel audio systems, the ideal distance between the left
and right channel speakers should be in the range of 6-10 feet (1.8-3.0m)
apart. If the layout of the joists and light fittings permit, the speakers should
be equidistant from the most commonly used listening position.
Stereo Sound Layout
To ensure the best stereo effect, place
speakers along a common wall, roughly equal
distances from the intended listening area.
Left
Speaker
Listening Area
Atlantic Technology ceiling loudspeakers feature swivelling tweeters to aim sound
directly at the listening area to compensate for offset mounting.
Right
Speaker
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Distributed Audio Speaker Placement
IC Series Thin Bezel Ceiling Speakers
Distributed Audio Placement
Atlantic Technology loudspeakers possess extremely smooth and predictable off-axis frequency response. However, in some cases, where the room
is large, you may wish to consider the use of two (or more) pairs of speakers in order to provide a wider and more even dispersion of sound. A more
even distribution of sound in this way means that people within the room
are more likely to be equidistant from the speakers so that there are less
“hot” or “cold” spots of audio volume.
When connecting more than one pair of speakers to an amplifier it is vital
to maintain a compatible impedance load between the amplifier and speakers. Your amplifier will specify an acceptable impedance range which it can
handle and you must ensure you do not drop the total impedance below
that specified minimum level or you may damage your amplifier. If in doubt
you should consult a professional installer or contact Atlantic Technology
directly before commencing installation.
As an example, a typical amplifier may specify an acceptable operational
impedance range of 4 to 8 ohms. If you connect two pairs of Atlantic Technology 8-ohm loudspeakers in parallel, the impedance you will present to
the amplifier is 4 ohms. This is within acceptable limits of most quality
amplifiers. If you connect them in series, you will present 16 ohms resistance to the amplifier which will reduce the available power, but be a very
“safe” load for the amplifier.
Generally, you should not connect two 4-ohm loudspeakers in parallel,
because then the impedance will be 2 ohms and may damage your amplifier. If they are connected in series, the impedance will be 8 ohms and therefore within acceptable limits.
Please note that, much like attaching a trailer to the back of a car, attaching a second set of speakers to an amplifier puts an additional load on the
amplifier (or engine). This makes it work harder for the same performance
or it may simply not have the power to perform satisfactorily. You need to
check the capability of your chosen amplifier before attempting multiple
speaker connection.
5.1 Channel Home Theater Placement
Front of room
towards the front of the theater (see diagram on page 5).
When using the 6.3 or 8.3 speakers as
side channel speakers in a 5.1 channel
home theater environment, they should
be located directly alongside the listening area to just slightly (1-2 ft.) behind
it. If you are setting them to Dipole
(see diagram below), the tweeter with
the single leg of the bridge should face
7.1 Channel Home Theater Placement
When using the 6.3 or 8.3 speakers as side and back channel speakers in
a 7.1 channel home theater environment, they should be located directly
alongside the listening area to just slightly (1-2 ft.) behind it. If you are setting them to Dipole, the tweeter with the single leg of the bridge should
face towards the front of the theater (see diagram on page 6). The back
speakers should be behind the listening position, about 1-2 ft. away from
the rear wall if possible.
rear of speaker
BIPOLE
Generally, the best results are when the .3 back
speakers are set to Dipole, whether or not the .3 side
speakers are set to Dipole.
You may use the 6.2 or 8.2 as either side or back
surround speakers, with excellent results, in either
a 5.1 or 7.1 home theater system. If you are mix-
DIPOLE
ing .3 and .2 surround speakers in a 7.1 system, it
is advisable to use the .3’s as side surrounds, set to
Dipole. Use the angle tweeter capability on the .2 speakers to aim the tweeter
away from the listeners, towards the wall, to create a more non-localizable,
diffuse surround effect.
LCR Use in a Home Theater
The IC-6 HT is ideally suited for front LCR use in a home theater system
when wall-mounted or free-standing speakers are not desired.
Mount the speakers so that the woofers are angled towards the listening
position. (See diagrams on page 5 and 6)
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