L-Acoustics KS28, Owner'S Manual

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Loudspeaker congurations
KS28 in cardioid conguration
Deployed in a cardioid conguration, a KS28 system produces a rear SPL rejection. The deployment consists of an
array of four KS28 with one element turned towards the rear (reverse). Refer to the
Cardioid Conguration
technical
bulletin for more information.
The [KS28_60_C] / [KS28_60_Cx] and [KS28_100_C] / [KS28_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 KS28 subwoofers can be driven by the LA12X / LA2Xi amplied controllers.
vertical
on-end
block
stacked
upright
Preset [KS28_60_C] / [KS28_60_Cx] [KS28_100_C] / [KS28_100_Cx]
Low frequency limit (-10 dB) 25 Hz
Use [xxxx_xx_C] or [xxxx_xx_Cx] on a reversed subwoofer in a cardioid conguration
The cardioid conguration consists in reversing 1 element in an array of 4 subwoofers.
Refer to the subwoofer owner's manual and to the
Cardioid congurations
technical bulletin.
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 (9.2 ft) or 1.7 m (5.6 ft) if the upper frequency limit of the subwoofer system is at
60 Hz or 100 Hz, respectively.
20 KS28 owner's manual (EN) version 1.0