Input Level control
The input level control, 6V – 0,3 V,
matches the output of your radio to
the input of the amplifier. After instal-
lation is complete, make sure the in-
put of the amplifier is turned down all
the way ( counter-clockwise at 6V ).
The high pass filter
blocks
very low
frequencies from reaching
the speakers. It is mostly
used at say 60 Hz to
protect small speakers (
like 6 inch and smaller )
from deep bass.
High Pass filter on rear / front channels
6
The
X-D50
is a 5-channel amplifier for use with a
front and rear system and a subwoofer.
The amplifier has the following filters / features:
Stereo sections (front & rear channel pairs):
High pass filter adjustable from 15 to 250 Hz.
Level control adjustable from 0,3 to 6 Volt.
Mono section:
Lowpass filter adjustable between 30 and 150 Hz.
Subsonic / highpass filter fixed to 25 Hz.
Phase control adjustable from 0 to 180 degrees.
Play a 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 radio and
amplifier levels are matched.
The phase control can be set
continuously from 0 - 180 degrees.
This function is used together with
subwoofers. This is very useful when
you want to adjust the bass sound for
best front stage image. Start at 0 and
turn the control slowly clockwise until
you experience that the bass sound is
coming from the front. If you don’t get
the result you want, also try to phase
reverse the subwoofer connections and
make a new adjustment.
Phase control on mono sub channel
Level
6V
0,3V
Phase
0
180
o
Set the filter to 15 Hz position if you want to run the
amplifier in full range mode (almost).
The filter can not be switched off.
Features / crossovers
Low Pass filter on mono sub channel
The low pass filter is mostly
used for subwoofers. It will
allow low frequencies only
and blocks higher frequencies.
A typical setting is 50 – 70
Hz.
The filter can not be switched
off.
Crossover
15 Hz
250 Hz
50 Hz
100 Hz
Crossovers and other features
Crossover
15 Hz
250 Hz
50 Hz
100 Hz
