Atlantic Technology 5 LCR Speaker User Manual

343 Vanderbilt Avenue Norwood, MA 02062 (781) 762-6300
Instruction Manual
System 5 LCR
High Performance
InWall Loudspeaker System
System 5 Manual 2
5/31/02, 1:44 PM
System 5 LCR
High Performance InWall Loudspeaker System
Thank you for purchasing Atlantic Technology products. Our speaker systems
have been designed to deliver exceptional sound and value. We hope you like
what you hear from them, and are happy with your decision to buy them.
Hard surfaces create lots of sound reflections in the room while soft surfaces
tend to absorb sound. Note the speaker’s location in terms of proximity to
glass and other highly sound reflective or absorptive surfaces. A simple pair
of curtains can make a major difference in sound quality and intelligibility!
The more similar the speaker’s surroundings, the more consistent the sound
will be. So placing one speaker directly adjacent to a glass wall, with the
other speaker by an open archway, will make for two dramatically different
sounding speakers.
Please take a few moments to read these instructions. They’re intended not
only to tell you how to mount the speakers, but how to get the best performance from them.
Important Considerations
Before Installation
Note that as bass frequencies reflect within the room, some locations may be
bass heavy while other areas may be bass shy. With an external subwoofer,
changing its placement within the room may reduce these effects. But when
in-wall speakers are utilized full range, the only real option is to change the
listening position, if you end up in a difficult bass area.
Recommended Wire Sizes
The longer the wire run, the heavier the wire should be. Use the following
recommendations as a guide for your installation. And if you’re in doubt,
remember that it never hurts to get the next heavier grade of wire. Also note
that lower gauge numbers equal heavier wire sizes.
Wire Run
Home Theater Systems
Today’s home theater systems require you to place six or more speakers in
your room. Placement for these speakers is potentially more critical than
with pure music reproduction alone. That’s because the goal of setting up
a good home theater isn’t to put you in the movie theater; it’s to put you
in the movie! That’s right, we want you to believe you’re in the jungle, the
restaurant, the office, or wherever the video scene is taking place. If you keep
this goal in mind throughout the system development process you’ll end up
with a better home theater, for sure.
Wire Gauge
<15 ft.
18 ga.
15 to 30 ft.
16 ga.
30 to 50 ft.
14 ga.
50 to 80 ft.
12 ga.
80 to 120 ft.
10 ga.
Left/Center/Right Locations The front three speakers should be at ear
height when seated, just as with stereo speakers. Unfortunately, the presence
of the television tends to make this difficult, if not impossible to achieve.
(Unless you’re using a front projector and a perforated screen with the center
channel speaker directly behind it). The closer you can get to this ideal the
better, however. Try to keep the left and right speakers within 3 feet to either
side of the TV screen. If possible, place the left and right speakers no more
than 2 feet above or below the height of the center channel speaker. The
center speaker itself should be centered on, and directly above or below the
TV screen.
Location, Location, Location
A major determinant of any speaker’s sound quality is the room and its location in it. With in-wall speakers there are fewer placement options than with
box speakers, so giving some thought to location can really pay off. Additionally, the wall your speaker is mounted in will affect its sound. Our InWall
Theater Systems have been computer designed to minimize the detrimental
effects wall mounting can have on sound, so they sound better than most, if
not all in-wall speakers.
IMPORTANT: The System 5 LCR speaker may be used in a vertical (portrait) or
horizontal (landscape) orientation.
The All Important Surround Speakers In order to achieve optimum performance we strongly recommend Atlantic Technology Dipole or TriVector surround speakers. If you are using our dedicated surround speakers please follow
the placement recommendations included in their installation instructions.
Locations of Choice
Assuming that you’ll be using System 5 speakers for more than simple background listening, here are some placement recommendations:
Non-Dipole Surrounds If you decide to use the System 5 LCR as a surround
speaker keep the following in mind. The more a direct radiator like the System
5 LCR is aligned with your ears, the more localizable its sound will be. And
since the vast majority of surround information consists of sonic cues that
aren’t supposed to be localized, this is particularly undesirable. Generally
then, when used as a surround speaker, place the System 5 LCR on the side
or rear walls at least 2 feet above ear level, when seated.
Stereo Systems
For stereo music reproduction the speakers are best located at approximately
ear level when seated, both on the same wall, facing the prime listening
location. A separation of approximately six to eight feet between the left and
right speakers is usually good. Ideally, the distance between the two speakers
will be the same as the distance from the speakers to the listening position.
The speakers and the listening position will then form an equilateral triangle.
There is a benefit to mounting the speakers approximately the same distance
from the side walls, so they both create the same reflective patterns.
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Atlantic Technology
Mounting Issues for System 5 LCR
Installation of System 5 LCR in Existing
Removing and Installing the Grille
NOTE: We always recommend a professional be involved in the installation of
InWall Theater System speakers, if at all possible.
Remove the grille from the speaker using an awl or the point of a drywall
screw in a grille opening near one of the grille corners. Slowly pry the grille
out, being careful not to damage the speaker’s frame or its finish. Install the
grille by pressing it carefully into the appropriate opening in the frame assembly. Since it’s designed to fit snugly, please take your time and use care
when installing the grille.
The System 5 LCR speaker can be easily mounted in most any standard wall
material, from 1/2 to 1-1/2 inches thick. Its rotating wall clamps firmly fix
it to the wall surface after the proper cutout has been made. Here are some
important precautions to take before mounting:
Keep the sides of the actual mounting hole at least 1-1/2 inches away from
beams or studs. The clamps require 3/4 of an inch to rotate, and a stud or
other obstruction that’s too close will stop them from properly doing their
Cutting the Opening
After determining the best location for the speaker as outlined above, use the
enclosed template to cut the proper size hole (9-3/4” x 7-1/8”).
Wall cavity size will effect the bass and midrange performance of any in-wall
speaker. The System 5 LCR is designed to play optimally in a 0.5 to 1.0 cubic
foot space (measured before wall insulation is inserted). Cubic dimensions
can be determined by multiplying the length x width x height of the cavity.
A larger cavity won’t hurt, but a smaller one will definitely impact the bass
and midrange response of the system.
WARNING: Exercise extreme care before making any wall cuts to ensure that you
will not cut through any wires, pipes, or other items that may be in the wall. You
may sometimes, but not always, be able to determine the approximate location of
wires and pipes by looking at the locations of nearby outlets and plumbing. But their
location or absence is never an assurance that there is not something within the
wall cavity.
Some of the sound from the speaker will transmit to the space on the other
side of the wall cavity. If this is a major concern, you can build a box within
the wall that provides the required cubic volume. The larger the volume, the
better the bass response will be, up to .75 cubic feet. Beyond this size there
will be no effective performance gain. Also please note that there is very little
room behind the drivers in a standard “2 x 4” wall cavity (there’s only 1/4
inch), so the back of any enclosure box must be made from relatively thin materials, yet it should not physically contact the back wall. Typically then, the
back wall material of your enclosure will be roughly 1/8 to 1/4 inch thick.
8-1/2 in.
Outside Speaker
7-1/8 in
Speaker Cutout
9-3/4 in
11-1/16 in.
For optimum sound install the Atlantic Technology IWTS Foam Damping
Kit in the speaker cavity. If you don’t install this kit, at the very least line the
cavity with fiberglass wool (insulation), observing all the relevant precautions
and instructions from the insulation manufacturer. If you have built a back
box, you can use common fiberglass insulation or open cell foam rubber in
the enclosure. Be sure to push the insulation back from the drivers to ensure
that it doesn’t get into the moving cone area.
Ceiling Mounting
It is especially important when mounting the speaker in a ceiling that you
cover the back of the system with a fiberglass window screening (available
at any home center or hardware store) to keep insulation and other foreign
matter out of the assembly. You also should install safety wires from the rear
of the assembly to a secure mounting place, like adjacent beams or the floor
above, for added security. Should you be installing System 5 speakers in a
suspended ceiling, it is imperative to install safety wires from the speaker to
the support structure above, to ensure security under all conditions.
Installing the Mounting Frame
The clamping mechanism allows the wall material to range from 1/2 to 1-1/2
inches (12 to 38 mm) in thickness. There must be a minimum depth behind
the wall face of 3-5/8” (92 mm). As noted above, be sure to keep the edges of
the cutout at least 1.5 inch (37.5mm) away from any stud or obstruction, as
the rotating clamps will not operate properly if you don’t. The speaker baffle
(the part with the drivers mounted in it) is designed to mount into the white
frame, after the frame is mounted into the wall.
Installation of System 5 LCR in New
Atlantic Technology offers an optional Rough-in Frame Kit to ease installation
in new construction. Instructions for its use are included with this kit. The
kit’s model nomenclature is IN-NC-5
Insert the frame into the cutout and using a level or square carefully align it
so it is (or it appears) level. Tighten the mounting screws, which will cause the
attached clamps to rotate and position themselves properly behind the wall.
Continue to tighten until the frame is snug in the wall. You want the bezel
to conform to the wall board, and the frame not to rattle from the speaker’s
vibration but be very careful not to overtighten the screws.
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System 5 LCR
Painting the Speaker Assembly
The white plastic frame of the speaker baffle assembly and the metal grille
may be left as is, or painted to match your décor. You can paint the frame
before or after it is installed in the wall. Spray painting (using slightly thinned
paint) is the best method to use for painting the grille. After painting the
grille, use air pressure to “blow out” any grille holes that are covered over
with paint.
System 5 LCR (IWTS-5 LCR)
Speaker Connection and Assembly
Strip about 1/2" of insulation from the connecting wires. Connect them to
the appropriate push terminal, being careful to observe polarity (positive to
the red terminal, negative to the black terminal). Install the speaker baffle assembly into the previously mounted frame assembly, being careful to ensure
that the speaker wire isn’t pressed up against the back of a speaker cone, and
screw it into place using the supplied screws. Again, be careful not to overtighten the screws. Insert the grille into the frame as outlined above, being
careful not to damage the frame or the grille’s finish.
High Frequency Level Control
There is a switch located behind the grille on the front of the speaker. This
switch is accessible by removing the grille as outlined above. You can change
the switch setting with your fingernail or a small pointed object, such as a ball
point pen. The switch has three settings that adjust the high frequency output
from the speaker. We strongly recommend that you try all three settings, using
both music and movies (if the System 5 LCR is part of a home theater system).
Please note that recordings vary in their sound balance so try several different discs. Try to achieve the best balance of natural overall sound with good
detail and clarity. The switch settings are “Normal” in the lower position,
“-2dB” in the middle position, and “+2dB” in the upper position. To aim the
tweeter, press gently on the plastic ring that surrounds the dome, but not the
dome itself. Aim the tweeter at the prime listening position when the LCR
is used as a front speaker, and away from the listening position if it’s used as
a surround.
11"H x 8-7/16"W x 3-5/8"D
Cut-out Dimensions
9-3/4"H x 7-1/8"W
Optimum wall volume
0.5 - 1 cu. ft.
1 - 6.5" IMG woofer
1 - 1" Silk dome tweeter
There’s a “knockout” plug in the front baffle. You can identify it by locating
the Atlantic Technology wave logo which is molded into it. If you are using
a multi-room control system, you can install a standard IR receiver in the
knockout hole.
Frequency Response
52 - 20kHz ± 3dB
6 Ohms
Crossover Frequency
3400Hz, 4th order Linkwitz-Riley
Companion Components
New Construction Kit
Should you have any questions or problems please feel free to contact us at
781-762-6300 or through our web site,
System 5 Manual 2
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172 PBM, 272 PBM
IWTS-6 or 8 CMS,
System 10e SR,174 SR