Atlantic Technology IWTS-6 CMS - Manual

I w
T
s
IWTS-6 CMS and IWTS-8 CMS
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
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
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
Figure 1
Tweeter Dispersion Pattern
When set
to Mono
When set
to Stereo
A
Atlantic Technology.
I n n o v a t i v e H o m e T h e a t e r
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.