4
– CIS400
CIS400 –
5
Support Rails
C-Ring
Bracket
Ceiling Tile
T-Channels
6. INSTALLING THE CIS400
The CIS400 can be installed into suspended or drywall-based
ceilings. The speaker is secured in place with the four rotating
mounting tabs. The support rails are used with suspended
ceilings (standard 24" spacing) to transfer the weight of the
speaker to the T-channel runners.
PLACEMENT
There are two considerations when deciding where to place
the CIS400 speakers.
Location:
When installing the speaker in a suspended
ceiling with conventional ceiling tiles, the location of the
speaker is determined in part by the support grid of the
suspended ceiling system.
When installing the speaker in a drywall ceiling, the
location of the speaker is determined in part by the location of
the ceiling joists.
Coverage:
It is important to locate the speakers in such
a way that the sound is evenly distributed over the entire
area. Keep in mind that the sound has farther to travel on the
outside edge of the coverage area for each individual speaker
than directly below the speaker, resulting in a decrease in SPL
at the outer edges of the listening plane. The CIS400 is –6 dB
at an off-axis angle of 55º from 1 kHz to 6 kHz (110º coverage).
The speaker placement should be designed such that the
edges of the coverage pattern for each speaker are at least
touching. The more overlap that is provided (higher density
coverage), the more SPL the system is capable of providing and
the less variation in level as you move around the area. The
downside of higher density coverage, of course, is that more
speakers are required for a given area.
INSTALLATION
Note:
Observe all local and national codes when installing the
CIS400.
1. Cut the hole for the speaker using the supplied cutout
template. If using a circular cutter, set the diameter to
10.8 inches (274 mm).
2. Insert the C-ring
(2)
through the hole so the hanging
brackets on the C-ring point up. If installing in a suspended
ceiling, align the support rails
(3)
on either side of the hole
and hook them onto the T-channel runners in the suspended
ceiling support grid. Then slide the C-ring brackets over the
support rails as shown in the illustration below.
3. You can install the CIS400 speakers using either conduit or
plenum-approved jacketed cable.
A. Installation with Plenum-Approved
Jacketed Cable or Flexible Conduit
Note:
If you can access the back of the CIS400 once it is
mounted, you may prefer to do steps A3 and A4 before doing
steps A1 and A2.
A1.Attach the speaker cable to the supplied Phoenix-type
connector
(8)
. This is a 4-position connector, with two “+”
and two “–” terminals. Connect the speaker cable to the
“+” and “–” terminals labeled
IN
. If connecting another
speaker in a distributed system (in parallel), connect the
speaker cable running to the next speaker to the “+” and
“–” terminals labeled
LOOP THRU
.
A2.Open the terminal cover plate
(7)
on the back of the
CIS400. Route the speaker cable through the strain relief
bracket
(9)
, and connect the speaker connector
(8)
to the
1
2
3
4
+
LOOP
THRU
LOOP
THRU
IN
IN
+
–
–
IN
+
IN
–
LOOP
THRU
–
LOOP
THRU
+
