Cardioid Configuration - L-Acoustics SB18 User Manual

SB18 / SB18
user manual
VERSION 2.2
2.2

Cardioid configuration

The cardioid configuration corresponds to the use of subwoofers as cardioid subwoofer arrays. In this configuration,
the system produces a rear SPL rejection.
The [SB18_60_C] preset features a 60 Hz upper frequency limit.
The [SB18_100_C] preset features a 100 Hz upper frequency limit.
They both feature delay settings optimized for cardioid SB18 arrays.
The SB18 subwoofers are driven by the LA4, LA4X or LA8 amplified controllers.
[PRESET]  [SB18_60_C]
or [SB18_100_C]
LF extension (-10 dB): 32 Hz
Delay settings
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.
Distance between enclosures
Place the subwoofer enclosures side by side.
If not possible, the maximum distance between two adjacent acoustic centers must be:
- 1.7 m with [SB18_100_C]
- 2.80 m for [SB18_60_C]
NomProduit_UM_0.1
/ SB18 subwoofer
i m
SB18 in cardioid configuration
Directivity pattern
Horizontal symmetric
Central rear rejection
Vertical
w w w . l - a c o u s t i c s . c o m
Directivity pattern
Horizontal asymmetric
Rear rejection on the side of the reversed subwoofer
Horizontal
On-end
Block
8