L-Acoustics KIVA SB18, User Manual

Page: 14 / 28

SB1 SB1 SB1 SB18 8 8 8
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 1.0
SB18_UM_ML_1-0 w w w . l - a c o u s t i c s . c o m 12
12 12
12 en
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.
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 arraying all SB18 subwoofers with front grills facing the audience so as to obtain 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 following (see also Figure 6):
•
The “vertical” and “block” array 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
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.
IMPORTANT
CAUTION