Atlantic IWTS-6 CMS User Manual

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IWTS-6 CMS and IWTS-8 CMS

TriMode Ceiling Speakers

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Installation Instructions

Thank you for purchasing Atlantic Technology speaker products. These
unique. TriMode speakers solve myriad surround sound and distributed
audio installation problems. We work very hard to ensure that all of
our speakers consistently deliver exceptional performance and value.
We hope you enjoy them to their fullest. Please take a moment to read
the.se instructions so you can get the most from your speakers.

Mounting Specifications

These speakers are intended for mounting in a ceiling, in material
ranging from 0.5 inches to 1 inch thick. They require at least 3-7/8
inches for the 6 CMS and 4-1/4 inches for the 8 CMS clearance behind
the front surface of the ceiling. The mounting opening for the 6 CMS is
7-7/8 inches in diameter. The mounting opening for the 8 CMS is 9-1/2
inches in diameter. These speakers will work equally as well in a wall
as in a ceiling, however note that the 8 CMS requires more mounting
depth than is normal in a 2x4 studded wall.

Operating Modes and Locations

Mono Mode Use .Mono mode when the speaker will play a single

channel of information {as either the left or ri^t channel of a stereo pair
of speakers). When used in Mono mode, both tt^’eeters reproduce the same
signal. In Mono mode the speaker can be located any-where within the
listening area. Generally howe\'er. it’s best to keep it at least 24 inchesaway
from any wall boundaries (ceiling/wall/comer). Placing any speaker in clase
proximity to other boundary surfaces will always “color” thesound that the
speaker produces. Even speakers that incorporate frequenc)' adjusimenLs to
compensate can only make small improvements to the detrimental effects
of boundar)' reflections. The more directly under the speaker you are, the
more high frequency information you will hear. Should you be using two
speakers in Mono mode to reproduce stereo, consider where the majority

Figure 1

Tweeter Dispersion Pattern

When set

to Mono

When set
to Stereo

of the room’s occupants will be most
of the lime. Then try to locate the
speakers where the listeners will gel a
reasonable balance of .sound from both
speakers. When wired in Mono mode
the tweeters interact strongly, chang
ing the dispersion pattern of the high
frequencies as shown in Figure I.

Important Hote: DO NOT rotate

the tweeter assembly or damage
will occur. To achieve the desired
dispersion pattern, rotate the entire

speaker assembly before mounting.

This can and should be used to your
advantage by rotating the speakers in
order to align the nveeiers when you
mount them. This way you can exert
some control over the spread of mid

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and high frequency sound throughout the room and hence improve the
system’s performance.

Atl an tic Te chn olo gy.

Innovative Home Theater

Stereo Mode In Stereo mode each ofthe woofer’s dual voice coils

and the tweeters receives their own signals. The result is stereo repro
duction (albeit with limited .separation) from a single speaker. This l.s
particularly advantageous in distributed audio systems where there is a
desire to have stereo sound in many rooms, but with as few speakers as
possible. Unlike so manycciling speakers. lhc8and6CMS use very high
quality component parts and sophisticated designs to deliver excellent
sound quality; sound quality so good that it will surprise you. When
installed as a single point stereo speaker it’s typically best to locate the
speakerascenlrally within thelistcningarea as possible. Directly in the
center of the room, or in the middle of the prime sealing area.

TriVector'" Surround Mode TriVector mode puts the two tweet

ers in each speaker out of phase with each other. The result, when you
sit centered on the tweeter array, is a non-localizabic sound licid that
helps re-create the surround field intended by the movie’s director.
Since the goal of Home Theater is to get you “lost in the movie,” a
diffuse surround field almost always works best. To that end the ideal
location for most diffuse surround speakers is directly to the sides of
the prime listening area. However, in many rooms there’s simply no
place to conveniently place speakers to the sides. Until the introduction
of Atlantic’s TriVector ceiling surrounds, the ceiling was an often used,
but generally less than ideal alternative.

When used in TriVector mode these speakers are best placed in the
ceiling to the sides of the prime listening location, with the tweeters
aimed towards the front and hack of the room. You can also place the
speakers to the side and slightly fonvard or back of the prime listening
position, keeping the tweeter orientation as noted above. There’s a 15
degree “window” of placement fonvard or back ofthe listening position
that isacceptable. But note that any more forw'ard or back and you’ll lose

the diffuse effect. Also note that, due to the low midrange frequencies
coming from the woofer, if you place the speakers directly over the
listening position there will be a fair amount of localizable surround
sound even when the speakers are set to TriVector mode.

New Construction and Retrofit Installations

Note: A

rtew c onsf mcf» on r ough- in

available from Atlantic Technology. Please refer to the instructions included
in those kits fa their use. If the rough in kit has been used please go direaly

to Step 2 below

Mounting Hole Specifications:

IWTS-6 CMS: Diameta = 7-7/8 in., 205mm; Depth = 3-7/8 in., 98mm
IWTS-8 CMS: Diameter=9-1/2 in.. 247mm; Depth = 4-1/4 in.. 108mm

Cul an appropriately sized opening in the ceiling material. Be sure that

the ceiling material can support the weight of the speaker. Also be sure

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that the sides of the opening are at least 1*1/2 inches away from any
beams or studs within the cavity. I f it is not, the rotating clamps will be
restricted in their movement and may not clamp properly.

Be sure that all foreign material in the ceiling is kept out of the speaker

assembly, particulariy the back of the woofer cone. (There is a cloth

2

shield on the rear of the woofer, but please u.se care anmay.) If the
ceiling is void of insulation it will be beneficial to the performance of
the speaker to install an Atlantic Technology foam Sound Damping Kit
behind and around the assembly.

IMPORTANT: Depending on the sound mode (mono, stereo or sur

round) you intend to use, certain settings must be made before installing

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yourspeaker(s).
Jumper Settings Pind the jumper pins on the crossover board of your

speaker. I’hey are the same for both the 6 CMS and 8 CMS. Por Stereo
operation, install ihejumper blocks as shown in Figure 2A. For Mono/
TriVector operation, install the jumper blocks as shown in Figure 2B.

Operation Settings To set the 6 CMS for Normal (mono or stereo)
operation, attach the wiring connector to the pins marked NOR on
the crossover board as shown in Fig. 3A. For Triveclor surround
operation, attach the connector to the pins marked SUK (Fig. 3H).

To set the 8 CMS for Normal (mono or stereo) operation, set the
upper selector switch located on the tweeter as.sembly to NOR. For
TriVector .surround operation, .set the selector to SUR (see Fig. 4A).
Use the high frequency level adjustment, also liKated on the tweeter
assembly, to increase (+) or decrca.se (-) the level of high frequency
.sound produced by the tweeters. The settings on the 8 CMS can easily
be changed after the speaker is installed (see Fig. 4B).

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Attach the previously installed audio feed wires to the appropriate
sj>eaker terminals. For Mono or TriVector operation either set of input
terminals may be used. For .Stereo operation one set ofleadsisattached
to each set ofinput terminals. Simply remove 1/2 inchofinsulation from
the end of each input wire. Push down on the terminal connector and a
large opening will appear in the shaft of the connector that is capable of
holding up to 10 gauge wire. Insert the bare wire into the opening and
release the terminal. Be sure to observe correct polarity, connecting the
positive (-t-) leads to the red terminals and the negative {•) leads to the
black terminals. Also be sure that no stray strands of wire touch across
any terminals. See Figure 5.

Check to ensure that the rotating clamps are “parked” and not sticking
out over the edge of the assembly.

Push the speaker assembly straight up into thcopening with the tweeters
oriented as noted previously.

Tighten the mounting screws one at a time. As you lighten, the rotating
clamps on the back of the assembly wilt turn and lower, until they contact
the back of the ceiling and clamp the ceiling beriveen themselves and
the trim ring. See Figure 6.

Snug all four mounting screws in this manner to make a firm seal with
the ceiling. Be careful not to overtighten them.

Start the system and make sure the speakers are operat

ing properly. If you have Installed the 8 CMS adjust the high
frequency switch (on the tweeter assembly, under the grille) to gel the
most natural balance of sound throughout the listening area.

Install the grille by placing it into the recess and pushing it

in gently.

Specifications

iWTS-6CM$ IWTS-8 CMS

frequenc|rR«ponw

SS-20kK2.<i/-3dB 45 - 20kHr.W-3d8
SemilMty(1 walVI meter)89d6 89d8
impedance

2x8U. Stereo. 1x40. Mono

2i8U. Stereo. 1 x4fl. More

\Voolef type Du4VC, OualVC,

MiciHGrafArte loaded (Wymer cone

M<a№raohite 'oaded Posner cone
Tweeten 2 X 3M incfi Domet vtfphase lent 2 X1 mdi domes w^hete tent
Weigh:

Atlantic Technology
.Î4.Î Vanderbilt Avenue Norwood. MA 02062
(781) 762*6300

48К»

www.allanticlcchnology.com

$2$bs 1

010-1082