Specifications

TI 323 (6.0E)
31 - 36
C3 SUB
TOP
C3
C3
C3
C3
C3
TOPTOP
SUB
SUB
SUB
SUB
SUB
SUB
SUB
SUB
SUB
TOP
-30 ° +30 °0° 0°
0°
-1°
-3.5 °
-8.5 °
-18.5 °
Far
field
Mid
field
Near fieldSide field
Stage
9.7. Example 7:
6 x C3, 4 x C4-TOP and 10 x C4-SUB are used in this
medium sized array.
The coverage groups are shown in the picture below.
The far field is covered for low/mid and middle
frequencies by the entire centre C3 column. At higher
frequencies the upper close coupled C3s provide high
frequency coverage in the far field. Increasing the
splay between the loudspeakers pointing towards the
mid and near field, scales the HF energy according to
the distance.
For many venues a horizontal dispersion no more
than 40° is advantageous to serve the far field
minimizing the amount of reflected energy.
For the mid and near field an increased horizontal
dispersion angle is achieved by the two C3 cabinets in
the inner column (in rows 3 and 4), covering the mid
field and the front of house position. Near field and
side field coverage is provided by C4-TOPs, using
their 35° vertical dispersion angle to maintain a
proper frequency response for those areas.
The C4-SUB arrangement provides the level
distribution and power to cope with the C3/C4-TOPs.
The SUB column 2 delivers a high vertical directivity,
whilst the SUB cabinets in columns 1 and 4 increase
the horizontal directivity to the far field.
Two to four ground stacked B2-SUBs and additional
ground stacked fills such as C7-TOPs complete the
system.
The following TransCalc spreadsheet image shows the
rigging details for the above array example.
The TransCalc Listening Plane view enables the
engineer to exactly define the aiming of the cabinets
in the vertical and horizontal. The vertical aiming of
the main C3 column just cuts into the listening plane at
the farthest point. The cabinets below are set with an
increasing splay angle.
The other columns follow in principle the same rules
as the main column. Make sure to keep the aiming
points of all loudspeakers inside the listening area.
This minimizes the reflected energy from the
boundary walls. The inner column should not fire
across the entire room. This leads to large path length
differences between the left and right sources and
could cause echoes.