Crossovers
Input Level control
The input level control, 8V – 0,5 V,
matches the output of your radio to
the input of the amplifier. After in-
stallation is complete, make sure
the input of the amplifier is turned
down all the way ( counter-
clockwise at 8V ).
The DLS Reference amplifier RA10 include low pass
filter (LP) and subsonic filter.
- LP-filter 40 - 125 Hz, slope 12 dB / octave
- Subsonic filter 25 Hz fixed frequency, slope 18 dB /
octave. The subsonic filter can be switched off.
Subsonic filter
Low Pass Filter
The
LP-filter
( low pass filter) is
used for subwoofers. It will allow
low frequencies only and blocks
higher frequencies.
A typical setting is 50 – 80 Hz.
6
Play a tape or CD, make sure all bass or treble
settings or equalizer are flat, and turn the volume
of the radio up until you just start to hear distortion.
Turn the volume control down just a bit. On the
amplifier increase the input level control ( clockwise
or to the right ) until you just start to hear distortion,
then back the level control just a bit. Now your ra-
dio and amplifier levels are matched.
Grand bass 40 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. You can
also adjust the phase from the
front seat by using the
Remote
bass level and phase control
box
.
Phase control
This function is used to
compensate for the bass box
function and to adjust for your
own taste of bass. Set level
control at 0 dB if you want it
to be inoperative.
PHASE
0
180
DEGREE
BASS
0
+18
dB
GAIN
8V
0,5V
LP-filter
FREQUENCY
40 125
Hz
RA10
The subsonic filter is used to take
away the very deepest
frequencies from a bass box.
The x-over frequency is 25 Hz.
IN
OUT
Remote bass level and phase control box
The amplifier includes a remote control unit. With
this unit it is possible to adjust the bass level and
phase from the front seat. Connect the cable
between the amplifier socket and the socket on the
remote box. Activate the remote control box by
pushing the switch to position
IN
.
