Low Extension Mode; Description - L-Acoustics KARA Manuel D'utilisation

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KARA KARA KARA KARA
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user manual user manual user manual user manual
VERSION 1.3
7.4

LOW EXTENSION mode

7.4.1

Description

In LOW EXTENSION mode KARA operates within its nominal bandwidth (55 Hz – 20 kHz) to allow combinations with
the dedicated complementary SB18 subwoofer and/or the high-power SB28 subwoofer. The bandwidth of the system
is extended down to 32 Hz with the SB18 and 25 Hz with the SB28.
The combination of the extended bandwidth of the [KARA] preset and the SB18 will allow reaching the greatest sub-
low contour within some physical restrictions due to the frequency overlap between both systems. The LOW
EXTENSION mode comprises 5 preset combinations:
1 - When combining [KARA] with [SB18_100] the KARA is associated with the SB18 in closely coupled
configurations only. The SB18:KARA recommended ratio is 1:3.
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).
Note: 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 9 and refer to the SB18 User manual
[3.4]).
Figure 9: KARA/SB18 combination examples in LOW EXTENSION mode (part 1)
KARA_UM_ML_1-3
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WST WST WST LINE SOURCE LINE SOURCE LINE SOURCE LINE SOURCE
[SB18_100]
[KARA]
w w w . l - a c o u s t i c s . c o m
[SB18_100_C]
[KARA]
14 en 14 14 14