Input Level Control, Bass Eq; Features On Each Model - DLS XM20 Owner's Manual

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.
High Pass filter (HPF) - all models
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.
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.
Low Pass filter (LPF) - 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.
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.
BASS EQ
GAIN
MIN MAX

Features on each model

HPF FULL LPF
FILTER HPF
50 Hz 500 Hz
HPF FULL LPF
LPF FILTER
50 Hz 500 Hz
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.
XM20
The 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
XM40
The 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
6dB 0 12 dB
BASS
EQ
5