Input Level Control, Bass Eq, Etc; Features On Each Model - DLS Signature S1 How To Install And Operate

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 the head unit ON, you can
adjust the GAIN level, A normal
setting is from 12 - 14 o' clock.
High Pass filter (HPF) - S2 / S4
The high pass filter
blocks very low frequen-
cies from reaching the
speakers, mostly used
to protect small spea-
kers from deep bass.
Set the push button to ON and the HPF / LPF button
to HPF (button OUT) to activate the filter, or OFF
if you want to run the amplifier in full range mode
without limiting the frequency range.
Low Pass filter (LPF) - S2 / S4
The low pass filter is
mostly used for sub-
woofers. It will allow low
frequencies only and
blocks higher frequen-
cies. A typical setting is
60 – 70 Hz.
Set the push button to ON and the HPF / LPF but-
ton to LPF (button IN) to activate the filter, or OFF
if you want to run the amplifier in full range mode
without limiting the frequency range.
The S4 model have the same setup of filters on
channels 1 & 2 and 3 & 4 as well.
Low Pass filter (LPF) / Phase shift
The low pass filter is
mostly used for sub-
woofers. It will allow low
frequencies only and
blocks higher frequen-
cies. A typical setting is
60 – 70 Hz.
The LPF filter has two selectable
slopes 12 or 24 dB, choose the
slope that sounds best in your
installation.
Phase switch - S1
To get the best possible front stage from your sub-
woofer installation you can choose the phase shift
between 0 (button OUT) or 180 degrees (button IN)
Listen to the bass and choose the position that gives
the best front stage in your vehicle.
5
Bass EQ S2 / S1
Bass EQ or Bass boost is used
to increase the bass volume at a
specific frequency (45 Hz). You can
adjust the amplification from 0 dB
(no amplification) to + 6 dB.
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.
Subsonic filter on S1
The subsonic filter reduces the
lowest frequencies below 30 Hz.
In ON-position the bass sound
becomes more tight. Choose the
position that best suits your ears
and the installation.
Subsonic filters are recommended
with Vented / ported encolsures to
prevent subwoofer damage from
exceeding X-Max at frequencies
below the box tuning frequency.

Features on each model

S1
The is a Mono amplifier for subwoofers.
The amplifier has the following filters / features:
 Lowpass filter adjustable from 35 to 250 Hz
 Remote level control.
 Phase switch 0 - 180 degrees
 Subsonic filter
 Selectable LPF slopes 12 / 24 dB
 Bass EQ 0 - + 6 dB adjustable
S2
The is a 2-channel amplifier. Can be used for a
pair of stereo speakers or a subwoofer 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 0 - + 6 dB adjustable
S4
The is a 4 channel amplifier which can be used
for front and sub, front and rear or 2 way active
operation.
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.