Operation; System Configuration; Standard Mode; Description - Acoustics SB18 Manuel D'utilisation

SB1 SB18 8 8 8
SB1 SB1
COMPACT HIGH POWER SUBWOOFER COMPACT HIGH POWER SUBWOOFER COMPACT HIGH POWER SUBWOOFER COMPACT HIGH POWER SUBWOOFER
USER MANUAL USER MANUAL
USER MANUAL USER MANUAL
VERSION 1.2

7 7 7 7 OPERATION

OPERATION
OPERATION OPERATION
7.1

System configuration

Two operation modes (STANDARD and CARDIOID) associated with a set of factory presets will allow building all the
common configurations (C, LR, LCR, distributed, ARCSUB...).
The function of the SB18 is to extend the low frequency response of a main system down to 32 Hz. An SB18 array can
be used in the STANDARD or CARDIOID mode whether the coverage pattern is intended to be omni-directional or
to feature rear and/or side SPL rejection, respectively.
Always check that each SB18 enclosure is connected to the correct output channel before operating.
CAUTION
Note: The latest versions of the LA4 and LA8 PRESET LIBRARIES are downloadable from the L-ACOUSTICS
web site [3.4].
7.2

STANDARD mode

7.2.1

Description

The STANDARD mode consists in turning all SB18 subwoofers composing the array front face towards the audience.
Such an arrangement produces an omni-directional coverage pattern. The associated standard presets are available in
both LA4 and LA8 PRESET LIBRARIES.
The basic arrays contain four enclosures. Several basic arrays can then be put together to form larger ones. The
recommended basic standard arrays are the "vertical", "block", "on-end", and "horizontal" ones, as shown in Figure 6.
They feature the following properties:
•
The "vertical" and "block" arrays provide omnidirectionnal coverage patterns in the horizontal plane.
•
The "on-end" and "horizontal" arrays provide directive coverage patterns in the horizontal plane.
If two (or more) basic arrays are intended to be used in close proximity from each other it is
recommended to set the distance at 0 (as shown in Figure 9).
If it is not possible, the maximum distance between two acoustic centers is 2.8 m in the
IMPORTANT
32-60 Hz frequency bandwidth and 1.7 m in the 32-100 Hz bandwidth.
Note: In the STANDARD mode the SB18 enclosures can also be used in stereo or distributed configurations.
SB18_UM_ML_1-2
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