DLS Signature S1 Instruction sheet

USER MANUAL

How to install and operate the
DLS amplifier models
Welcome to DLS!
For us, it’s all about the sound experience. We
care deeply about sound and construction quality.
In order for your experience to be as optimal as
possible, it is important that you read this manual.
Read it from beginning to end, preferably before you
start your installation. We have made sure to write
this manual in easy to understand english and use
drawings to make it more comprehensible.
Make sure you have all necessary tools nearby
before and that you are completely confident in how
to process. If you feel the slightest uncertainty; feel
free to take the help of an experienced installer.
Warranty Service
This amplifier is covered by warranty, depending on
the conditions in the country where it is sold. If the
amplifier is returned for service, please include the
original dated receipt with the product.
Content
Features……………………………...................2
Installation…………………….……..................2
Routing Wires…………………….....................2
Tools and materials needed………..................3
Wiring & crossovers:
Power and remote wiring...............................3-4
Low & High level input wiring............................4
Input level control, BASS EQ, etc.....................5
Features on each model...................................5
S1 speaker wiring:
One or more subwoofers..................................6
S2 speaker wiring:
Front speakers…...………………......................7
Subwoofer………………………….....................7
S4 speaker wiring:
Four speakers……………………......................8
Two speakers and bridged subwoofer..............8
Two subwoofers or a stereo speaker pair
connected in bridge mode.................................9
Troubleshooting…………………….................10
Testing……………………………….................10
Professional tips………………….........…...11-12
Specifications……………………….................13
Product markings…………………...................14
Technical Assistance
For technical assistance ask the shop where the
product was sold or the distributor in your country.
Information can also be found on our website:
www.dls.se
We follow a policy of continuous advancement in
development. For this reason all or part of specifica-
tions & designs may be changed without prior notice.
Winn Scandinavia AB
Elementvägen 15 - SE-702 27 Örebro - Sweden
Tel: [phone] - E-mail: [email protected]
www.dls.se
DLS amplifiers are engineered by DLS Sweden,
a part of:
DECLARATION OF CONFORMITY
DLS amplifiers for vehicles are manufactured in
accordance with the EU directive EEC 95/54 (72/245/
EEC) and are marked with the approval number.
They are also marked in accordance with the WEEE-
directive 2012/19/EC.
The products are also produced in accordance with
the EU RoHS directive 2015/863/EU.
S1 / S2 / S4
Designed & Sound tuned in United Kingdom.

The models include the following
features:
- Analogue class AB or D technique
- High efficiency
- Low profile design
- RCA line inputs
- High level input with auto start
- Powerful DC cable terminals
- Built-in active crossovers
- Remote sub level control on S1
Installation
Before you begin installation
Before you begin you need to read the manual and
have tools, cables and other material available. There
is one such list of material on the following page.
Amplifier location
Important
Allow air circulation around the amplifier.
Stereo
head unit
2
Disconnect Battery
Before starting the instal-
lation, always disconnect
the negative terminal of
the battery.
Professional Tip:
If amplifier installation kits are available with diff-
erent sizes of power cable, chose the heaviest
power cable to improve sound quality and to allow
more amplifiers to be installed now or later.
The oversized power terminals on S1, S2 and S4
accept up to 2 AWG / 35mm2cables. Depending on
length we recommend using 2 AWG / 35 mm2to
S1 and at least 8 AWG/10 mm2to S2 and 4 AWG
/ 20 mm2to S4 for best performance*. Both the
positive wire and the ground wire must have the
same size. */OFC copper
NOTE! To avoid cable fire, be sure not to over-
size the main fuse value for the power wires.
THE DC-FEED
Maximum main fuse values for different cable sizes.
6 mm2/ 10 AWG: 25 A 10 mm2 / 8 AWG: 40 A
16 mm2 / 6 AWG: 60 A 20 mm2/ 4 AWG: 100 A
35 mm2/ 2 AWG: 150 A 50 mm2 / 1 AWG: 200 A
The S2 and S4 models are Class AB amplifiers
which by the nature of their operation generate
more heat than Class D types. When mounting
under front seats consider if it is possible to direct
air from rear seat ventilation ducts onto the ampli-
fier casing. S2 and S4 have internal cooling fans,
where possible please ensure the intake under the
amplifier isn’t blocked by carpet. Consider raising
the amplifier to allow air to reach the fan intake.
Choose a location where air can circulate freely
around the amplifier. Do not cover the amplifier with
carpets or hide behind trim panels. Do not mount
the amplifier in an inverted or upside down position.
Check all locations and placements carefully be-
fore making any cuts, drilling any holes or making
any connections.
IMPORTANT!
Use the metal screws included with the ampli-
fier when you do the installation. Do not use
oversized screws.
Routing wires

Tools and materials needed
Tools:
Flat and Phillips screwdrivers
 Wire cutter
Wire stripper
 Electric drill with drill bits
Crimping tool
Digital multimeter or test lamp
Wire brush, scraper or a piece
of an abrasive sheet to remove
paint for a good ground connection
Grease to protect the ground
connection from oxidation
Material:
Speaker wire: minimum
12 AWG = 4 mm2for subwoofers con-
nected to S1
13 – 16 AWG = 1,5 - 2,5 mm2 for other
speakers
Sheet metal screws for mounting the
amplifier to the amplifier board and the
amplifier board to the car + some extra
for fuse holder, amplifier ground etc.
Electrical insulation tape
½ inch thick plywood or particle board
for the amplifier to be mounted upon.
Amplifier installation kit:
If available, buy an amplifier installation kit. It con-
tains normally all you need. This is what you have
to buy if you buy the items separately
20- 25 feet = 6-7.5 meter power cable,
minimum AWG 8 = 10 mm2 or heavier
1 pc of fuseholder to install close to the
car battery + fuse (see below)
20 feet of AWG 15 = 1,5 mm2wire for
remote turn on / off cable from radio.
RCA-cable for input from radio.
- 20 feet or 5 meter for trunk installa-
tions
-12 feet or 2 – 3 meter for under seat
installations
Two ring crimp terminals, –one
for connection to the battery plus and
one for the amplifier ground connec-
tion.
Four to eight splicers to connect spea-
ker cables to high level input cable, if
high level input is used.
Wire ties
Insulating grommet or insulating tube
Power wiring
There are no internal fuses in the amplifiers. The
use of an external fuse is essential for safety.
Fuses
Power terminal ( +12V)
Be sure to use a rubber grommet or a plastic insu-
lating tube where the cable passes the firewall or
other places where it can be easily jammed.
Use wire ties to secure to existing cables in the
engine compartment.
Connect the fuse holder as close to the vehicle
battery+ as possible, using 4 AWG /20mm2or
8 AWG/10mm2power cable. Use a ring crimp
terminal to connect to battery. The 4 AWG/20mm2
cable can use a 100 Amp fuse , if the cable is
smaller, the fuse value must be lower (see table
on previous page). This fuse is to protect from
cable fire!
Battery
+ pole
Ground Terminal ( GND )
Connect to a good chassis ground. The ground
connection should be clean, unpainted metal to
provide a good electrical connection. Use a wire
brush, a scraper or a piece of an abrasive sheet
to clean the metal. Use a lock washer or two to
secure contact. Protect with silicon grease or by
paint applied afterwards.
Power
(Blue)
Protect
(Red)
Power Light / Protect light
The power indicator (blue) is lit when the
amplifier is turned on.
The protect indicator (red) is lit when the
amplifier shuts down from over-heating,
or a short circuit (speaker failure).
Turn off your audio system to reset the
amplifier if the red protect light is turned
on. If the red lamp doesn’t turn off, con-
tact your local dealer for advice.
DLS
fuse holder
DLS
3
NOTE!
Max fuse value is always related to cable size.
Recommended fuse rating:
Signature 2: 40 A
Signature 4: 60 A
Signature 1: 100 A

Connect left and right speaker wires coming from
the car stereo to the high level input as shown. You
must connect both plus and minus as the inputs
are balanced, connecting plus only gives lower
level and bad sound quality. By changing the pola-
rity of plus and minus, you can change the phase.
The HL connector wires match with DIN wiring color
codes. The car loom wiring may have different color
codes. When High Level inputs are used, the turn on
signal for the amplifier is taken from the high level
input, therefore no seperate remote wire is needed.
S1
Connect high-level L and R (summing inside):
Important
Use either the low level or high level input, do not
use both at the same time.
Low level input
Use a pair of shielded stereo audio cables with RCA
type jack. Most trunk-mounted amplifiers need a
20 feet RCA cable (approximately 5 – 6 meters).
Connect to input socket CH1 / CH2 on S2.
Or R/ L on S1.
S4 has dual inputs
CH1 / CH2 / CH3 / CH4 Depending on your chosen
configuration you can use either two separate RCA
cables, or a single RCA cable together with an Y-
split to connect both inputs.
Remote terminal ( REM )
Low level Input Wiring
Inputs may be low level from the RCA output of the car
stereo or high level from the car stereo speaker output.
Low level = RCA is prefered for the best sound quality.
For RCA cable signal input:
Connect the radio power antenna lead = remote
turn on/off from the car stereo to the amplifier
remote connection. This turns on the amplifier
whenever the car stereo is turned on. You can either
use the built in remote cable in the RCA cable itself
or use a separate cable.
Sometimes a small disturbance may enter the amp-
lifier coming from the remote voltage , through the
built in remote wire and into the RCA cable. Thus
we recommend to use a separate remote wire and
run the RCA lead separate from remote wire, power
cables and speaker cables.
If there is no remote voltage available from the
stereo, you must connect to the ignition key through
the radio or any accessories fuse.
When high level input is used the amplifier starts
automatically when your car stereo is switched on.
To head unit Power
Antenna lead or
remote output.
A cable up to AWG 14 (2,5
mm2) fits the amplifier remote
(REM) terminal.
High Level Input wiring
For High Level input:
Most headunits are pre-installed from the car factory
and have no RCA output, in this case you can take
the signal from the speaker output instead.
Use either a separate remote cable or let the high
level signal automatically start the amplifier.
Hi level input plug.
Hi level input plug.
Hi level input plug.
4
S4
The four channel amplifier is connected likewise,
however it has four channels. You can feed two
channels from RCA and two channels using high
level input from rear speaker cables, or all channels
from high level input.
S2
Connect high-level CH1 and CH2 as below:
Hi level input plug.

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.
The high pass filter
blocks very low frequen-
cies from reaching the
speakers, mostly used
to protect small spea-
kers from deep bass.
High Pass filter (HPF) - 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.
The S2 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
The S4 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.
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.
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) - S2 / S4
Features on each model
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.
The S1 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
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.
Low Pass filter (LPF) / Phase shift
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 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.
The LPF filter has two selectable
slopes 12 or 24 dB, choose the
slope that sounds best in your
installation.
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.
5
Subsonic filters are recommended
with Vented / ported encolsures to
prevent subwoofer damage from
exceeding X-Max at frequencies
below the box tuning frequency.

S1 speaker wiring
Two 4 ohm subwoofers One 4 ohm or 2 ohm subwoofer
NOTE!
Two 4 ohm subwoofers gives a 2 ohm load when
connected in this way.
Minimum amplifier load is 1 ohm, lower impedan-
ces may damage the amplifier.
NOTE!
Subwoofer impedance can be 4 ohm or 2 ohm.
Minimum amplifier load is 1 ohm, lower impedan-
ces may damage the amplifier.
CONNECTIONS IN SERIES OR PARALLEL
Subwoofers with dual voice coils, or any subwoo-
fer, can be connected in series or in parallel for
various impedances but the resulting impedance
must never be lower than 1 ohm.
Filter settings Low Pass filter
- +
+ -
+ -
You can adjust the bass sound level from the
front seat of your car if you connect the external
sub level control box. The external remote works
together with the interanal gain control, the setting
of the internal gain decides the maximum level
also for the external level control.
Connect to REMOTE socket on S1.
Remote sub level control
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 se-
lectable 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
subwoofer 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.
For power wiring, see page 3-4
For high or low level input wiring, see page 4
For Bass boost and subsonic control, see page 5
POWER
MIN MAX
6
S1

S2 speaker wiring
Two fullrange speakers to channel 1 / 2 One 4 ohm subwoofer bridged
For power wiring, see page 3-4
For high or low level input wiring, see page 4
NOTE!
Minimum amplifier load is 2 ohm in stereo mode,
lower impedances may damage the amplifier.
The speakers can be coaxial speakers or 2/3-way
kits.
NOTE!
Minimum speaker impedance in bridged connec-
tion is 4 ohm, this connection gives a 2 ohm load
with a 4 ohm subwoofer (the load is halved when
connected in bridge mode).
Do NOT use subwoofers with lower impedance
than 4 ohm. Connect speaker + to CH1+ and
speaker - to CH2 -.
Filter settings CH 1/2 for 2-channel stereo use Filter settings CH 1/2 for subwoofer use
+ -
+ -
+ -
The high pass filter
blocks very low fre-
quencies from reach-
ing the speakers,
mostly used to protect
small speakers 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.
Adjust with the HPF control after your own taste,
a normal setting is 50 - 70 Hz.
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.
7
S2

2. Two fullrange speakers and one subwoofer
bridged to S4 (3-channel mode).
Filter settings front channels CH 1 / 2
S4 speaker wiring
1. Four fullrange speakers to channel 1/2/3/4.
Filter settings front channels CH 1 / 2
Filter settings rear channels CH 3 / 4
For power wiring, see page 3-4
For high or low level input wiring, see page 4
Speakers connected to channels 1 / 2 and
subwoofer to channels 3 / 4.
Speakers connected to channels 1/2
and to channels 3/4
Filter settings rear channels CH 3 / 4
For the rear channels 3/4 the filter should be ad-
justed in the same way as for channels 1/2.
4 ohm
+ -
+ -
+ -
speakers
Subwoofer
The low pass filter is
used for subwoofers. It
will allow low frequen-
cies only and blocks hig-
her frequencies. A typical
setting is 60 – 70 Hz.
Set the push button to ON and the HPF / LPF
button to LPF (button IN) to activate the filter.
The high pass filter
blocks very low fre-
quencies from reach-
ing the speakers,
mostly used to protect
small speakers 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.
Adjust with the HPF control after your own taste,
a normal setting is 50-70 Hz.
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.
Adjust with the HPF control after your own taste, a
normal setting is 50-70 Hz.
+ -
+ -
+ -
+ -
8
S4

3. Two subwoofers or stereo speakers brid-
ged to S4.
Filter settings front channels CH 1 / 2
S4 speaker wiring
Filter settings rear channels CH 3 / 4
For power wiring, see page 3-4
For high or low level input wiring, see page 4
One 4 ohm subwoofer or speaker connected
to channels 1 / 2 and one 4 ohm subwoofer or
speaker connected to channels 3 / 4.
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
button to LPF (button IN) to activate the filter.
When the S4 is used for bridging a stereo speaker
pair set use only the HPF filter. 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.
Adjust with the HPF control after your own taste,
a normal setting is 50-70 Hz.
S4
4 ohm
+ -
4 ohm
+ -
9

If problems occour during the installation, or later,
this guide might help you to find out what´s wrong.
THE AMPLIFIER IS DEAD:
1. Check power lead, ground and remote connec-
tions at the amplifier using a multi meter.
2. Check the battery terminal connections.
3. Check the power lead fuse or circuit breaker. If
fuse damage continues, inspect the power lead
for short circuits.
4. Check the amplifier protection fuses. Are these
broken change to new ones with the same value.
If short circuiting continues, contact your local
DLS dealer. A fault may exist in the amplifier.
5. To start the amplifier requires a remote voltage of
9-15 volt. Check the voltage with a multi meter.
AMPLIFIER PROTECTION FUSE BLOWS AT LOW
VOLUME :
1. One or more speaker cables are shorted. Make an
insulation test with a multi meter. The cables must not
have a connection to earth.
AMPLIFIER TURNS OFF AFTER 10 - 30 MINUTES.
The amplifier is overheating due to inadequate ventila-
tion. Check mounting position is free from obstruction.
Do this:
1. Move the amplifier to a place with better ventilation.
2. Install one or two fans to cool down the heat-sink.
3. Overheating can also be caused by an impedance
load below the level permitted.
NO OUTPUT FROM ONE OR MORE SPEAKERS:
Check the following:
1. Balance control position.
2. Fader control position.
3. Speaker cable connections to amplifier and drivers
4. Signal lead plugs and cables.
5. Change left and right signal lead plugs in the
amplifier to see if the problem moves to a diffe-
rent speaker, the lead has a fault.
If the problem remains, the speaker or amplifier
is at fault.
Troubleshooting Testing
Before you finish the installation, you should do the
following tests to make sure the wiring is correct and
everything is operating properly.
Reconnect Battery
When wiring is complete,
reconnect the battery
negative terminal.
Test speaker connections
Make sure the speakers are connected right. Use
the balance control on the head unit to make sure
right channel is on right speaker etc. If speakers
don´t play at all, one or both speaker wires may
be disconnected.
Test power wiring
1. Turn on the head unit but do not turn up the
volume. The amplifier power light should come
on. If not, check the remote and +12 volt wires.
Also check the ground connection.
2. Turn up the head units volume slightly. All spea-
kers should operate. if not, check wiring
connections at amplifier and speakers.
10

NOISE PROBLEMS
WHINING NOISE VARYING WITH ENGINE
REVOLUTIONS:
Do this:
1. Rewire the power supply (12 V) to source
unit direct from battery.
2. Rewire ground wire from source unit to clean
position on chassis.
3. Check all power connections to ensure that
they are clean and tight.
4. Check quality of system ground connection.
5. Install a power capacitor with connections as
close as possible to the alternator. This by-
passes the noise at source and eliminates
many issues with noise problems. In cars with
a jump start connection, this provides a con-
ventent connection point for the capacitor.
CONSTANT WHINING NOISE:
Do this:
1. Ensure that all equipment has a common
ground point.
2. Check quality of earth strap connection from
battery negative terminal to chassis.
3. Disconnect signal cables from amplifier to see
if noise disappears. If so the leads are picking
up noise. Test this by laying a new cable over
the seats and reconnecting to the amplifier. If
the noise does not return, reroute original ca-
ble away from source of interference.
If noise remains regardless of cable position,
try to use so called Quasi-balanced signal ca-
bles. DLS PRO-cables are Quasi-balanced.
SPEAKER POLARITY CHECK.
All speakers in a car audio system should be con-
nected in phase (the same polarity). All speaker
cones must move in the same direction. Out of
phase speakers will cause a lack of bass, and a
poor stereo soundstage.
Checking polarity:
Hold the - connection of the speaker wire to the -
terminal of a 1,5 Volt flashlight battery. Tap the +
wire on to the + terminal of the battery, and observe
the movement of the cone. The cone should move
outwards when the wire touches the battery, and
inwards when the battery is removed. If it is the
other way around, the speaker has been connected
backwards and it must be removed and connected
correctly.
If your system also has a subwoofer connected
through a passive 6 or 12 dB crossover, try to
connect this with various polarity and judge what
sounds best. The phase shift in passive crossovers
sometimes makes it necessary to change polarity.
+
-
+
-
Battery
1,5 Volt
NOTE! Tweeters can not be tested this way, dou-
ble check the connections instead.
Professional Tip:Professional Tip:
Professional Tip:
Professional Tip:
Installation in the trunk
When installing the amplifier in the trunk, run the
power wires along the same path as the other
vehicle wiring. Many cars have insulated channels
for wiring. you will have to remove the door sill trim
and the carpet.
Securing wires
Use wire ties to bundle together when possible.
(But never bundle speaker wires or signal cables
together with power wires).
Professional Tip: Professional Tip:
Speaker and power wires
Do not run speaker and power wires next to each
other. Power wires can generate a ”siren” sound
in the speakers. Run speaker and power wires on
opposite sides of the car.
Crimp connections
Purchase crimp connectors and crimping tool.
Connectors are color coded.
1. Strip 1/4 inch (6mm) of insulation from the wire
2. Insert into connector
3. Crimp tightly
11

12
2V DIRECT IN BYPASS FUNCTION
The Signature amplifiers have a direct in bypass
feature for the optimum sound quality when running
the system from a DSP or DSP equipped source
unit. To access this feature the small section of the
bottom plate needs to be removed. Depending on
which S-series model you have, the bypass is put
on different places on the amplifier. The amount of
jumpers on the amplifier is based on the amount
of channels it has:
Professional Tip:
S1 (1-channel) S2 (2-channel) S4 (4-channel)
Gold plated PCB jumpers located on
the circuit boards are used to select the
Bypass function. These jumpers need
to be moved to bypass the pre-amp /
filter section.
ACTIVATE 2V DIRECT IN BYPASS PT.1
The default setting of the amplifiers when they
are sold is that the direct in bypass function is
OFF. To use the function, first disconnect the
amplifier from all types of connections and remove
the small bottom panel plate from the amplifier.
There are 4 screws that needs to be removed.
Locate the jumpers on the circuit board and move
the jumpers from 2 pins right-sided to the 2 pins
left-sided. WARNING! All jumpers should be moved
to the same position. If any aren’t moved then an
optimum setup will be near impossible to achieve.
Professional Tip:
ACTIVATE 2V DIRECT IN BYPASS PT.2
On Signature 1 and Signature 2 the jumper(s) need to
be in the ON position to activate the bypass function.
OnSignature4move thejumpers tothe ’BPS’position.
ON OFF ON OFF BPS
Professional Tip:
ON OFF ON OFF BPS
DIRECT IN BYPASS vs CROSSOVER
When the direct in bypass mode is turned off, you
can use the crossover functions on the side panel
normally to adjust your sound systems performance
(input sensitivity 1-4V). (Note:) When the bypass
feature is activated NONE of the front panel controls
will function. The input signal will then go in as a 2V
direct signal input in the amplifier (input sensitivity
fixed at 2V).
Bypass is only compatible with systems that have
a DSP or DSP equipped head unit. All functions
such as crossovers and level adjustments need to
be set up on the DSP.
The direct in bypass mode is used to achieve the
optimum sound quality when running the system
from a DSP or DSP equipped source unit. This
removes the pre-amp and filters from the signal
path which improves both signal to noise ratio and
sound quality.
WARNING! The jumpers should never be removed
from the amplifier. If you remove the jumpers the
amplifier will have no output and will not function
properly.
Professional Tip:

We follow a policy of continuous advancement in development. For this reason all or part of specifications
& designs may be changed without prior notice.
All output power ratings
are RMS Watts @ 14,4
VDC, CEA standard
13
Specifications
Number of channels
Amplifier class
Power output RMS in 1 ohm
Power output RMS in 2 ohm
Power output RMS in 4 ohm
Power output RMS 4 ohm bridged
Signal to noise ratio, A-weighted
Damping factor
THD @ 3 W, 20 Hz-300 Hz
THD @ 400 W, 100 Hz
THD @ 3 W, 20 Hz-20 kHz
THD @ 85 W, 1 kHz
THD @ 100 W, 1 kHz
Frequency response
Input impedance, low level
Input sensitivity - variable
Input comp mode - direct in
Input impedance, high level
High level input
Filter low pass variable
Filter high-pass adjustable
Filer low-pass adjustable
* can be switched in/out
Bass boost @ 45 HZ
Subsonic filter
Phase switch
Remote sub level control
Power consumption, idle
Power consumption, max
Fuse (no internal fuse used)*
Dimensions HxWxD (mm)
Dimensions HxWxD (inch)
Extra
Power terminal size
Minimum rec. cable size
Speaker terminal size**
Weight
*/ Depending on cable size
**/ OFC Copper
1
D
1000 W
800 W
450 W
-
94 dB
>150
<0,06%
<0,09%
-
-
-
10 Hz - 250 Hz
22 kOhm
1 - 4 V
2V rms / 400 W
45 Ohm
Yes (auto start)
35-250 Hz / 12 & 24 dB
-
-
0 - +6 dB
30 Hz ON/OFF
0 / 180°
Yes, with 5 M cable
1,2 A
102 A
100 A
54x129x370
2,1x5,1x14,6
Internal cooling fan
2 AWG / 35 mm²
4 AWG / 20 mm²
12 AWG / 10 mm²
2,9 kg
2
AB
-
2 x 180 W
2 x 110 W
1 x 360 W
116 dB
>150
-
-
<0,019%
-
<0,02%
10 Hz - 50 kHz
6 kOhm
1 - 4 V
2V rms / 100 W /ch
45 Ohm
Yes
-
50 - 500 Hz
50 - 500 Hz
0 - +6 dB
-
-
-
0,5 A
43 A
40 A
54x129x260
2,1x5,1x10,2
Internal cooling fan
2 AWG / 35 mm²
8 AWG / 10 mm²
10 AWG / 6 mm²
1,87 kg
4
AB
-
4 x 130 W
4 x 90 W
2 x 260 W
116 dB
>300
-
-
<0,065%
<0,065%
-
10 Hz - 60 kHz
5 kOhm
1 - 4 V
2V rms / 85 W /ch
45 Ohm
Yes
-
50 - 500 Hz
50 - 500 Hz
-
-
-
-
0,7 A
64 A
60 A
54x129x320
2,1x5,1x12,6
Internal cooling fan
2 AWG / 35 mm²
4 AWG / 20 mm²
10 AWG / 6 mm²
2,4 kg
Signature 1 Signature 2 Signature 4

The crossed-out wheelie bin symbol means that the product, literature and
packaging included must be taken to separate collection at the end of their
working life. Do not dispose of these products as unsorted municipal waste:
take them for recycling. For info on your nearest recycling point, check with your
local waste authority.
This product has been granted with the CE certification mark to show that the
product follows the health, safety, and environmental protection standards for
products sold within the European Economic Area (EEA).
DLS products complies with the relevant provisions of the RoHS
Directive for the European Union. In common with all Electrical
and Electronic Equipment (EEE) the product should not be
disposed of as household waste. Alternative arrangements may
apply in other jurisdictions.
DLS is a global partner of the European Mobile Media
Association, an organisation that focus on promoting the
custom made mobile media installations to consumers.
Product markings
14