Atlantic Technology IWTS-6 CMS User Manual

Atlantic technology, Installation instructions, Iwts-6 cms and iwts-8 cms trimode ceiling speakers

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TriMode Ceiling Speakers

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 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


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


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

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.


Hote: DO NOT rotate

the tweeter assembly or damage


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

Figure 1

Tweeter Dispersion Pattern

When set

to Mono

When set

to Stereo


Atlantic Technology.


n n o v a t i v e


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and high frequency sound throughout the room and hence improve the

system’s performance.

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.

This manual is related to the following products: