Fbt HORIZON VHA 118.2SA, Руководство по эксплуатации

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CONFIGURAZIONI CARDIOIDI
min 30cm.
min 30cm.
STAGE
FLOOR
FLOOR
Horiz. f=40Hz
Horiz. f=80Hz, normed to 1
Horiz. f=130Hz, normed to 1
CARDIOID CONFIGURATIONS
Cardioid configurations are useful to cancel low frequencies from the
stage and consequently to improve critical microphone recordings.
The cardioid configuration enables a cardioid distribution of the SPL
from subwoofers, reducing rear sound pressure.
It is perfect when the energy of the low frequencies has to be attenuated,
for example on the stage or in areas where it should be avoived due to
noise pollution.
For this purpose a rea sub shall be employed every two front subs.
The majority of the energy generated by the rear sub is used to cancel
the energy of the other two subs in the front area is equal to +1dB
approximately compared to a non cardioid configuration with two front
subs only.
Obviously, this configuration is valid also with a FRONT sub and a REAR
sub.
Subs position is very important in order to obtain the best possible rear
attenuation.
39
INSTALLATION
min 30cm.