L-Acoustics KARA Manuel D'utilisation page 19

5 - When combining [KARA] with [SB18_100] and [SB28_60] the KARA is associated with the SB18 in flown
closely coupled configurations only. The SB28 is staked so that it is decoupled from the KARA/SB18 assembly. The
SB28:SB18:KARA recommended ratio is 1:1:3. The bandwidth of the system is extended down to 25 Hz.
When SB18 are flown in a column above KARA, the maximum authorized configuration when using
[KARA] preset along with the [SB18_100] or [SB18_100_C] preset is 3 SB18 and 9 KARA in order to keep
an acceptable distance between both KARA and SB18 acoustic centers (see the left side of Figure 9).
When SB18 are flown in close proximity beside KARA this limitation does not occur anymore (see the
IMPORTANT
right side of Figure 9).
Note1: Two SB18 array arrangements are possible whether the directivity pattern is intended to be omni-directional
or cardioid. The cardioid arrangement is recommended within arrays containing a multiple of four SB18 enclosures and
in that case the [SB18_100] preset must be replaced by [SB18_100_C] (see Figure 13 and refer to the SB18 User
manual [3.4]).
The same remark applies for the SB28 where the [SB28_60] preset must be replaced by [SB28_60_C] (see Figure 13
and refer to the SB28 User manual [3.4]).
Note2: A small KARA array (typically composed of 6 enclosures as shown on the left side of Figure 13) of standard
curvature provides a flat contour. If needed, the KARA contour can be reinforced in the low frequency domain using
the LF CONTOUR tool of LA NETWORK MANAGER Software [3.4] with frequency set at 180 Hz and gain set
between 0 and 4 dB.
The association of KARA and LF CONTOUR allows reaching some unprecedented results when KARA/SB18 assemblies
are flown and SB28 are stacked due to the extended bandwidth and low-end capabilities of KARA.
[SB18_100]
[KARA]
Figure 13: KARA/SB18/SB28 combination examples in LOW EXTENSION mode
KARA_UM_ML_1-3
[SB28_60_C]
[SB28_60]
w w w . l - a c o u s t i c s . c o m
[SB18_100_C]
EN
[KARA]
17 en 17 17 17