Specifications

TI 323 (6.0E)
21 - 36
5
°
2.5
°
1
°
Target frequency response
Referring to set up examples 8 or 9, described later in
chapter 9, a modification of the column for sector 1
could be SUB-SUB-C3-C3-SUB-C4 (from top to
bottom), the other columns stay as shown.
6.1.3. Sidefills, backfills, downfills and
frontfills
Additional systems are needed to cover critical areas
such as directly in front of a stage, or side seating
tiers. For these areas it is essential to maintain total
system integrity and sound character. C7-TOP or
MAX fullfill this requirement as shown in the examples
later in chapter 9.
Sidefill and backfill systems cover the areas beneath
or behind the stage. In most cases these are located
near to the stage, are rather steep tiers or galleries
and need shorter throw and wider coverage angles
than the main system.
Frontfill systems cover the area directly in front of the
stage, the benefit is a better acoustic orientation and
intelligibility in the front rows.
If the set design does not allow frontfill systems,
downfills can be used to cover the area directly below
the main arrays and the front of stage. MAX can be
used as a complementary downfill to C3/C4/C7
systems in this situation.
6.1.4. Delay systems
There are two applications for delay systems:
Firstly, to increase the direct to reverberant ratio in
areas under balconies, or behind pillars. These are
usually smaller speakers that restore the high
frequency range within a mostly low and mid
reverberant field.
The other application is to support the main system
over large distances. For indoor situations their
purpose is to enable the main system to run at a
lower level or to maintain sufficient direct to
reverberant ratio in acoustically difficult situations, for
example when there are low or reflective ceilings. In
larger outdoor situations it is quite common to use
delayed systems that are similar to the main systems
and can deliver full energy to specific areas.
For indoor and outdoor purposes there are a few
basic recommendations:
Keep the horizontal coverage angle of the single
delay system narrow, 60° should be considered as a
maximum. Using wide angles creates time offsets
within the coverage area that are too large and
intelligibility will suffer dramatically.
Delay systems should offer directivity control to as low
a frequency as possible.
The omnidirectional lower frequency range will spill in
all directions and be audible beneath and behind the
delay system. It can also be advantageous to reduce
the level of a delayed full range system below the
frequency of its directivity control (LF roll off). Even
when using a delay system, almost the entire bass
energy has to be provided by the main system. Use
your ears.
Delayed systems should be placed as close as possible
to their target area, so their level and coverage can
be kept under control.
6.1.5. System tuning
Depending on the kind of system, signal processing is
required to achieve a proper sound quality.
Important:
Any kind of signal processing just affects the
loudspeaker. The rooms properties can not be
changed!
Do not try to create a flat frequency response. Due to
room acoustics a useful response would look similar
the graph below.