With Low-Frequency Element - L-Acoustics A15i Series Owner's Manual

Loudspeaker congurations
A15i Wide/Focus line source with low-frequency element
In this conguration, the bandwidth of the A15i system is extended down to 29 Hz and the LF contour is reinforced.
The [KS21_60] preset provides KS21i with an upper frequency limit at 60 Hz.
The A15i Wide/Focus and KS21i enclosures are driven by the LA2Xi / LA4X / LA8 / LA12X amplied controllers.
3 A15i Wide/Focus : 2 KS21i
reinforced contour
Enclosure
Preset
Recommended ratio
Frequency range (-10 dB)
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.
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
presets
[A15] or [A15_FI] + [KS21_60]
[A15] or [A15_FI] + [KS21_60_C]
46
max
2.8 m / 9.2 ft
A15i Wide/Focus
[A15]
1 A15i Wide/Focus : 1 KS21i
29 Hz - 20 kHz
pre-alignment delay values and polarity settings
A15 Wide/Focus = 3.5 ms
A15 Wide/Focus = 9 ms
1 A15i Wide/Focus : 1 KS21i
reinforced contour
+ 3 dB at 55 Hz
KS21i
[KS21_60]
KS21 = 0 ms
KS21 = 0 ms
A15i owner's manual (EN) version 1.0