L-Acoustics X8 User Manual - page 12
Loudspeaker configurations
X8 user manual (EN) version 2.0
12
X8 stage monitor with LF
Deployed as a stage monitor with SB15m subwoofers, an X8 system operates with augmented LF resources.
The [X8_MO] preset allows for a reference frequency response in stage monitoring applications.
The [SB15_100] preset provides the SB15m with an upper frequency limit at 100 Hz for an optimal frequency
coupling with the X8.
The X8 and the SB15m enclosures are driven by the LA4X / LA8 amplified controllers.
X8 with SB15m
With SB15m, the X8 system contour is reinforced by 8 dB contour at 100 Hz and the system bandwidth is extended
down to 42 Hz.
35°
Enclosure Preset
X8 [X8_MO]
SB15m [SB15_100]
Frequency range (-10 dB) 42 Hz - 20 kHz
Enclosure ratio 1 X8 : 1 SB15m
Delay values
Do not forget to add the pre-alignment and geometric delays depending on the configuration.
[X8_MO] + [SB15_100]
X8 = 0
SB15m = 2.6
[xx_MO] presets for the X series use the amplified controller low latency operating mode. When used along with
subwoofers, it is recommended to use the subwoofers in low latency operating mode. To achieve this, create
custom presets combining low latency channel sets and subwoofer channel sets.
If the subwoofers are driven from a dedicated amplified controller using a subwoofer factory preset, they are
operated in normal latency mode. Therefore, an additional delay should be set to the [xx_MO] low latency
channels to align them: 2.65 ms on LA4 and LA8 or 3.08 ms on LA4X.