L-Acoustics KS21, Owner'S Manual

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Loudspeaker congurations
KS21 in cardioid conguration
Deployed in a cardioid conguration, a KS21 system produces a rear SPL rejection. The deployment consists of an array
of four KS21 with one element turned towards the rear (reversed). Refer to the
Cardioid Conguration
technical
bulletin for more information.
The [KS21_60_C] / [KS21_60_Cx], and [KS21_100_C] / [KS21_100_Cx] factory presets provide the subwoofer system
with an upper frequency limit at 60 Hz and 100 Hz respectively in order to optimize the acoustic coupling with a main
full-range system.
The KS21 subwoofer is driven by the LA4X / LA8 / LA12X amplied controllers.
Preset [KS21_60_C] / [KS21_60_Cx] [KS21_100_C] / [KS21_100_Cx]
Low frequency limit 29 Hz 31 Hz
Delay values
When combining a line source with subwoofers, delays may have to be added to the presets.
Refer to the Preset Guide to obtain the pre-alignment delay values.
Grouping subwoofers
Place the subwoofer enclosures side by side. If not possible, the maximum distance between two adjacent
acoustic centers must be 2.8 m or 1.7 m if the upper frequency limit of the subwoofer system is at 60 Hz or
100 Hz, respectively.
KS21 owner's manual (EN) version 2.1 27