Input Level control - GAIN
The GAIN control, MIN – MAX,
matches the output of your radio
to the input of the amplifier. After
installation is complete, make sure
the input of the amplifier is turned
down all the way to MIN. After tur-
ning on the head unit you can adjust
the GAIN level, A normal setting is
from 12 - 14 o’ clock.
The high pass filter blocks
very low frequencies from
reaching the speakers. It is
mostly used to protect small
speakers ( like 5 inch and
smaller ) from deep bass.
High Pass filter (HPF) - all models
The low pass filter is most-
ly used for subwoofers. It
will allow low frequencies
only and blocks higher
frequencies.
A typical setting is 60 –
70 Hz.
The
XM20
is a 2-channel amplifier.
Can be used for a pair of stero speakers or a sub-
woofer connected in mono bridge mode.
The amplifier has the following filters / features:
❒
Lowpass filter adjustable from 50 to 500 Hz, the
filter can be switched off.
❒
Highpass filter adjustable from 50 to 500 Hz, the
filter can be switched off.
❒
Bass EQ in three steps, 0, 6 dB or 12 dB
5
The
XM40
is a 4-channel amplifier for use with a
front speaker and a subwoofer, or two speaker pairs
in front and rear.
The amplifier has the following filters / features:
❒
Lowpass filter adjustable from 50 to 500 Hz, the
filter can be switched off.
❒
Highpass filter adjustable from 50 to 500 Hz, the
filter can be switched off.
❒
Bass EQ in three steps, 0, 6 dB or 12 dB
Set the switch in position
HPF
to activate the filter.
Test which setting sounds best.
The filter can be set at
FULL
position if you want to
run the amplifier in full range mode without limiting
the frequency range.
Set the switch in
LPF
position to activate the filter.
Set the switch in
FULL
position if you want to run
the amplifier in full range mode.
Low Pass filter (LPF) - all models
Features on each model
BASS EQ
Bass EQ
is used to increase the
bass volume at a low frequency.
frequencies. You can select the
amplification in three steps 0 dB
( no amplification ) 6 dB or 12 dB.
The 6dB position is often the best
choise to avoid distorted sound.
This function is used to compen-
sate 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.
6dB 0 12 dB
BASS
EQ
50 Hz 500 Hz
FILTER HPF
HPF FULL LPF
50 Hz 500 Hz
HPF FULL LPF
LPF FILTER
MIN MAX
GAIN
