maintaining a competitive edge in price
quotes in installations that do not need the
extended performance of the larger models.
SPL Requirements: How Loud?
The EVID C8.2 is a great speaker to use when
higher SPL is required. The fidelity and band-
width of the unit is substantial and is ideal
for applications requiring high quality fore-
ground music reproduction. The C8.2 has
substantial low frequency energy down
below 60Hz. This is more than sufficient for
most applications.
Layout: How Many?
The chart below shows the effective coverage
diameter of the EVID models assuming a 4-
foot listening plane height. Using these fig-
ures you can lay out a coverage pattern for
the job after deciding the overlap criteria
described earlier on page 10.
Coverage Diameter by Ceiling Height
Model
8'
12'
20'
24'
C4.2
17'
34'
68'
85'
C8.2
11.5'
23'
45'
57'
C8.2HC
6.5'
12'
24'
30'
C10.1
180° coverage
Use of Subwoofers
The C10.1 subwoofer can add considerable
low-frequency performance to any EVID
installation. It is important to note that the
C10.1 subwoofer depends on the ceiling and
walls to properly load itself and to reinforce
its bass output. Correct positioning is impor-
tant to get maximum impact.
In smaller rooms when a single C10.1 is
used, a center or near-center position is best.
This gives the most even coverage. For larger
rooms where more than one C10.1 are
employed, the added effect of the room’s
walls can be used. In such a space, position
the subwoofers evenly throughout the room
and a few feet from the wall or corners. The
added loading of the walls will enhance the
response in these larger areas.
11
EVID™ Ceiling Series Installation and Operation Manual
Appendix B — System Design Guide
