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6
NOTE: All figures are direct-field SPL and C50 produced in EASE with interference turned
on when applicable. All plots depict the intended listening areas only, and do not include the
“offset distance” to the first row. For example, the first set of plots on figure 3 depict the same
54’ x 36’ area as figure 1. See notes on simulation software.
Figure 1
Direct Field SPL
C50
an idea on how the same auditorium floor plan could
be easily covered in a surround-style arrangement
with just two EVI systems per side rather than four
distributed arrays. Although not providing the high-
est intelligibility or smoothest response, it is appli-
cable to cinemas and some musical preferences.
This has the advantages of cutting installation time,
amplifier channels, additional delay lines and at the
same time providing superior coverage.
A gymnasium is another perfect application
for the EVI systems, covering each grandstand from
a pair of centrally located EVI systems (see Figure
8). In addition, you can cover the entire gymna-
sium from either a single lengthwise-oriented sys-
tem or with a pair of widthwise-spaced systems
with lower-SPL coverage on the floor of the
gymnasium than in the stands, so the players are
not disturbed by announcements (see Figure 9).
When the EVI-12 and EVI-15 systems are
tilted up approximately 15°, their coverage pattern
lengthens to match a level EVI-28 at 5 times the
height. In such cases the systems work very well to
replace a distributed system along a very long, fairly
wide corridor where very high SPLs are not
required on a continuous basis (such as an airport
concourse with 15 to 20 foot ceilings, where a
speaker would be placed about every 75 feet). See
Figure 10 for approximate mounting locations and
floorplan coverage.
These are but a few of the widely varied
applications where the new EVI-12, EVI-15 and
EVI-28 systems will easily outperform a conven-
tional system. The extremely uniform coverage of
the systems are fairly insensitive to placement, re-
quire only a few simple calculations to find the best
mounting location, and the aiming angle is no more
or less sensitive than a conventional loudspeaker.
This makes installation nearly foolproof. Even
installation in non-optimal conditions will produce
remarkably even coverage and high intelligibility.
As questions arise, you may feel free to con-
tact us at 800/234-6831, or FAX at 616/695-1304.
EVI SYSTEM MOUNTED
AT 18’ HEIGHT AND
0
°
AIMING ANGLE
(TOP PARALLEL TO FLOOR)