L-Acoustics A15 Focus, Owner'S Manual

Page: 48 / 98

Loudspeaker congurations
A15 Wide/Focus line source element with low-frequency element
With a complementary subwoofer, the system is extended in the low end and the LF contour is reinforced.
The [A15_FI] preset delivers a reference frequency response in short throw applications. The [KS21_60] preset provides
KS21 with an upper frequency limit at 60 Hz.
The A15 Wide/Focus and KS21 enclosures are driven by the LA4X / LA8 / LA12X amplied controllers.
Enclosure
A15 Wide/Focus KS21
Preset
[A15_FI] [KS21_60]
Recommended ratio
1 A15 Wide/Focus : 1 KS21
Frequency range (-10 dB)
29 Hz - 20 kHz
Use [xxxx_xx_C] 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.
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.
Delay values
Do not forget to add the pre-alignment and geometric delays depending on the conguration.
pre-alignment delays
[A15] or [A15_FI] + [KS21_60] A15 Wide/Focus = 0 ms KS21 = 2.6 ms
[A15] or [A15_FI] + [KS21_60_C] A15 Wide/Focus = 3.1 ms KS21 = 0 ms
48 A15 owner's manual (EN) version 1.2