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JBL PRX 918XLF - Application Examples - Cardioid Mode; Cardioid Mode Explanation

JBL PRX 918XLF
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11
CARDIOID
PA1 and PA2 CH1 XLR-1/4” Combo inputs mixed to individual Subs
CARDIOID
Cardioid mode helps subwoofer performance
become more directional and easier to
control. Users can experience +3-5db of low
frequency extension on audience side and up
to -10-17db of reduction on rear/stage side.
To use cardioid mode with 2 units of
PRX915XLF/PRX815XLF Series Subwoofers,
place them next to each other or stacked.
Adjust the audience firing subwoofer’s
preset as following for:
PRX915XLF:- 80Hz
PRX815XLF:- 100Hz
Adjust the rear-firing subwoofer’s preset to
CARDIOID
Run BOTH Full range PRX900 series speakers
from the pass through to the CH1 and
CH2 on the audience firing PRX900 Series
Subwoofers.
Run THRU each channel of the front firing sub
into each channel of the rear-firing sub.
Adjust volume accordingly.
MICROPHONE
(presenter or speaker) Subwoofer positioning distance
Microphone (speaker/presenter)
stands before subwoofer.
To prevent any unnecessary feedback, please:
Position Microphone at least 2m (6ft) from a speaker
Do not stand directly in front of a speaker
>1m
>2m
Audience Facing Sub Rear Facing Sub
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APPLICATION EXAMPLES

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