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The LP-filter will allow low frequencies only and
blocks higher frequencies. A typical setting is 70 –
90 Hz. When used with a subwoofer the switch
should be in IN-position. Set the LP-filter to 70-90
Hz.
GRAND BASS is used to increase the bass
volume with a center frequency of 40 HZ. You can
select the amplification between 0 dB ( no
amplification ) and +18 dB (full amplification).
The PHASE CONTROL can be set continuously
from 0 - 180 degrees. This is very useful when
you want to adjust the bass sound for best front
stage image. Start on 0 and turn the control slowly
clockwise until you experience that the bass sound
is coming from the front. If you dont get the result
you want, also try to phase reverse the subwoofer
connections and make a new adjustment.
Remote Bass level and phase control.
With the remote control unit it is possible to adjust
the bass level and phase on the subwoofer
channels 3&4, from the front seat. The box with
it´s functions is activated when the IN-OUT switch
is set to IN-position. Connect the cable between
the amplifier socket and the socket on the remote
box.
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Two fullrange speakers and one subwoofer to
RA30
Filter settings channel 3 & 4
With the HP-filter in OUT position the amplifier
allows the speakers to play fullrange. If you for
some reason want to limit the low bass
reproduction switch on the HP-filter. The typical
setting is then around 60 – 80 Hz.
Speaker wiring RA30
RA30 is a 3-channel stereo amplifier. It is normally
used to connect one pair of front/rear fullrange
speakers, and one or more subwoofers connected
to the mono sub channel.
RA30
Filter settings channel 1 & 2 (front system)
Rear or front speakers Rear subwoofer
-
+
RA30 is two ohm stable, so it is possible to connect
two front speaker systems, or two subwoofers, in
parallel.
Remote Bass lvel and phase control box
The RA30 includes a
remote control unit. With
this unit it is possible to
adjust the bass level and
phase on the subwoofer
channels 3&4, from the
front seat. Connect the
cable between the
amplifier socket and the
socket on the remote box.
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