DLS AMPREFEN User manual

OWNERS MANUAL
CAR AUDIO AMPLIFIERS
Reference 100A
Reference 200A
NOTE!
Read this manual thoroughly
before you start to install
DLS Svenska AB
Box 13029
SE-402 51 Göteborg
Sweden
Phone [phone]
Fax [phone]
E-mail: [email protected]
www.dls.se

- 1 -
Congratulations, you have just purchased the finest auto stereo amplifier that today´s technology can offer.
DLS offers a series of high quality car audio products for real music lovers, and we are sure that you will
enjoy a high class car sound for many years.
NOTE, read the owners manual first!
To maximize the performance of your system, we recommend that you thoroghly acquaint yourself with it´s
capabilities and features.Please take your time to study this manual before starting the installation.Then
you hopefully know how to do a correct installation avoiding connecting errors that can cause damage to
this fine product. Retain this manual for future reference.
TABLE OF CONTENTS:
Page 2 1. GENERAL PRODUCT INFORMATION
Page 2 2. INSTALLATION PREPARATION
Page 2 2.1 Location
Page 2 2.2 Power cables
Page 3 2.3 Signal cables
Page 3-4 2.4 Speaker connection, speaker loads, speaker polarity check
Page 4 2.5 Bridge mode - multimode operation
Page 5 2.6 Passive crossovers
Page 5 2.7 Level setting
Page 5 2.8 Final system setup
Page 5 2.9 Protection circuits
Page 6 3. INTERNAL FILTERS
Page6 3.1 Reference 100A
Page6 3.2 Reference 200A
Page 6 4. FAULT FINDING GUIDE
Page 6 4.1 Noise problems
Page7 5. CONNECTION DIAGRAMS Reference100A
Page 7 5.1 With one speaker pair in stereo
Page 8 5.2 With two speaker pairs parallel in stereo
Page 8 5.3 With one subwoofer in mono bridge mode
Page 9 5.4 In multimode operation
Page10 6.CONNECTIONDIAGRAMSReference200A
Page 10 6.1 With a front and a rear system in stereo
Page 11 6.2 With a front system in stereo and a subwoofer in mono bridge
mode
Page 12 6.3 With a front system in stereo, a rear system in stereo and a
subwoofer in multimode operation.
Page 13 6.4 With a stereo speaker system connected in bridge mode
Page 14 6.5 With a 3-way stereo system using the built-in active crossover.
Page 15 7. SPECIFICATIONS
Page 16 For your own notes
TABLE OF CONTENTS
CAUTION!
Some of our amplifiers are capable of producing a sound pressure level that can cause permanent
damage to your hearing system. High sound pressure levels combined with long time listening can give
permanent damage to your hearing system. Choose a listening level that is comfortable for your ear.
To establish a safe level:
Start your volume control at a low setting. Slowly increase the volume until you can hear the music
comfortly and clearly, without any distortion. Sudden sound shocks are dangerous.
The following noises can be dangerous with constant exposure:
90 dB Subway, motorcycle, lawn mover 4 hours max
100 dB Chain saw 2 hours max
120 dB Rock band live concert 30 minutes max
140 dB Gunshot blast, jet plane 0 minutes

1. GENERAL PRODUCT
INFORMATION
Thank you for buying a DLS amplifier.This amplifier
is a high quality product and is a result of many
years of experience of building high quality sound
products for vehicles.
We recommend you to carefully read this manual
before you start to install. Be sure to follow all
recommendations in the installation section. If you
do so we are sure that you will be able to enjoy a
perfect sound for a long time,.
2. INSTALLATION PREPARATION
Sections 2 - 4 in this manual are common for both
amplifiers. In section 5 & 6 you will find connection
diagrams for each amplifier model.
2.1 LOCATION
We recommend you to do a careful planning before
you start to install this equipment.
Choose a location for the amplifier which will allow
plenty of air to circulate around the fins on the top of
thecase.Verticalmountingistoprefer.DoNOTmount
the amplifier upside down under the hat rack.
Intheamplifier case there aredoublemountingholes
to make the installation job easier. The screws
suppliedin the plasticbag are selfdrilling when used
with an electric screwdriver.
Ifthesurfacewhere you intend to mount theamplifier
isn´t big enough you can mount the amplifier on a
separate fibre board or similar. This will also isolate
the amplifier chassies from ground.
NOTE! Before you start drilling, make sure that
there are no fuel or brake lines or wiring looms
behind where you intend to drill.
2.2 POWER CABLES
The DC power wiring is extremely important. It is
essential that the amplifier at all occassions gets all
the power it needs without voltage drop, otherwise
both the dynamics and the good sound will be lost.
A poor battery can also cause a bad sound
reproduction, escpecially in the bass range. Some-
times it is necessary to mount an extra battery.
All cable connections requires a 2 mm hexagon key
to connect the terminals.
Inmostcases a socalled”PowerCap”can be useful.
Itis an energy storage capacitordesigned to supple-
ment audio amplifiers during high current demand.
The overall bass response of your audio system will
be enhanced with the use of this due to it´s ability to
store a large amount of current and discharge it in a
short period of time.
If you have more than one amplifier in the system
youmust increase thecable size andfusecompared
tothe table. Whenconnecting two ormoreamplifiers
use some of the DLS Fuse blocks with built in fuses
to split the power to each amplifier. The short cable
fromthe Fuse blocktothe amplifier canhave a smal-
ler size for easier installation.
Don´t connect to battery before you have double
checked all connections.
- 2 -
In the table below you will find suitable cable areas
and fuse sizes for different cable lenghts.
The gold plated terminals will directly recieve
power cables up to 16 mm2(5AWG).
Mount a fuse holder (DLS FH 1 or similar) on the DC
-cable near the positive battery terminal. Use the
same cable size from the negative amplifier terminal
and connect to the nearest earth point.
Makesure to have agoodearth contact, ifnecessary
clean the metal from paint etc. A poor earth contact
can cause damage to other parts in the system, for
examplethe head unitif the earth current isforced to
pass through the shield of the signal cable.
GENERAL,POWER CABLING
Acableofacertainsizecan´thaveanoversizedfuse,
then the cable gets too warm before the fuse blows.
Max fuse values for different cable sizes:
6 mm2(9 AWG) 25 A
10 mm2 (7AWG) 40 A
16 mm2 (5AWG) 60 A
21 mm2(4AWG) 100 A
33 mm2(2AWG) 140 A
42 mm2 (1AWG) 200 A
Recommended main fuse for the amplifiers:
Amplifier Fuse value Fuse holder
Ref. 100A AGU 40A FH1/FH1B
Ref. 200A AGU 60A FH1/FH1B
Recommended cable size for the DC-feed.
Cable length: < 1,5 m 1,5 - 5 m > 5 m
Amplifier:
Ref. 100A 10 mm216 mm221mm2
Ref. 200A 16 mm221 mm233 mm2
Battery 12 V Twoamplifiers
Fuse block
Fuse

2.3 SIGNAL CABLES
Reference 100A has one gold plated phono socket
pairprovidedto recieve thesignalfrom the head unit.
Reference 200Ahas two phono socket pairs. One for
each amplifier part.
When the amplifier is being operated in bridge mode
both inputs must recieve an input for full power out-
put.
Usehighquality interconnects liketheDLS SL5PRO
or similar with an effective shielding that prevents
interference from the engine or alternator. When
using this cable you must run a separate wire for the
remote.
When you run the signal cables remember to keep
themwellspaced from the wiringloomandthe power
feed to the amplifier to avoid picking up interference.
Lay the power cables and signal cables separated
on each side of the car.Any extra cable must be laid
in zig-zag style and definitely not coiled. Or cut it to
correctlenght.
REMOTE WIRE
Some signal cables include a thin wire for remote
amplifier start. High quality cables normally requires
a separate wire for this. Connect between the head
unitsremote cable (oftenthe same cablethat´s used
for automatic power antennas) and the REM-termi-
nal on the amplifier.
NOTE! If you want to start more than one amplifier
using the remote output, the current load might be
too high for som head units. High currents may
damage the head unit, check in the manual for the
head unit. Sometimes you must add a relay to the
remote circuit that takes care of the higher current. If
you are uncertain of how to connect the relay, ask
your local DLS dealer for advice.
2.4 SPEAKER CONNECTION
The gold plated terminals will directly recieve
speaker cables up to 6 mm2(9AWG). Always
use high quality speaker cables such as DLS
SC 2x1,5, SC 2x2,5 or SC 2x4. Subwoofer
connection requires 2 x 4 mm2cable.
Connect the speaker + (marked with + or a red
dot) to the amplifier + terminal, and the speaker
- to the amplifier -.
When fitting the cables to the terminals, remove
only 10 mm of the insulation. Twist the wire
strand together and insert the wire after
loosening the terminal screw. Do not over tighten
as this can cut the cable strands. Use a 2 mm
hexagon key to the terminals.
If you want an extra high class speaker cable
choose any of the DLS SCP, SCK, SC 4x1 or
SC 4x1,5 cables.
SPEAKER POLARITY CHECK.
All speakers in a car audio system should be
connected in phase (the same polarity).All speaker
conesmustmove in the samedirection.Outof phase
speakerswill cause alack of bass,and a poorstereo
soundstage.
Checking polarity:
Hold the - connection of the speaker wire to the -
terminalof a 1,5 Voltflashlight battery.Tapthe +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
inwardswhen the batteryis removed. If it isthe 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
throughapassive6or12dBcrossover,trytoconnect
thiswithvariouspolarity and judge whatsoundsbest.
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, double
check the connections instead.
- 3 -
SPEAKER LOADS
Most car audio speakers have a 4 ohm impedance.
DLSamplifierscanbe loaded down to2ohmoneach
stereochannel.
Inmono bridge modeoperationthespeakerloadmust
neverbe lessthan 4ohm. Ifyou areusing morethan
one driver they must be connected in a way so the
impedance still is 4 ohm when connected to the
amplifier. When you run the amplifier in mono bridge
mode it sees a 4 ohm load as 2 ohm. On page 4 you
find different speaker wiring examples.
Don´t forget that the output power from a multimode
connected amplifier is more than double the normal
power. The speakers must be able to handle this
power.
PROTECT YOUR CABLES!
Topreventthecableinsulationfrom beeing damaged
over sharp metal edges we recommend the use of
cable protection tubes or similar. A damaged cable
insulationcould causeseriousdamagetotheamplifier
not covered by any guarantee.
CABLING, SIGNAL CABLES, SPEAKER CONNECTION

- 4 -
++
--
+
2 ohm
TWO 4 OHM SPEAKERS INPARALLEL.
NOTE ! Not for bridge mode operation.
MULTIMODE OPERATION
Multimode operation means that you connect one or
two systems in normal stereo mode and then add
one or more subwoofers in mono bridge mode to the
same speaker terminals. A center channel can be
connected in the same way.
To avoid amplifier overload you must ALWAYS use
passivefiltersinmultimodeoperation.Thesubwoofer
needs a 12 dB lowpass crossover and the stereo
system needs a 6 or 12 dB highpass crossover.
MULTIMODE OPERATION SCHEMATIC
SPEAKER CONNECTION EXAMPLES
SERIES /PARALLEL TO 4 OHM.
4 ohm
++
-
+
-
-
+
-
+
-
Each
speaker
is 4 ohm
TWO 4 OHMS SPEAKERS IN SERIES.
8 ohm
+
+
+
---
Not a recommended way to connect, the power is
only half.
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7
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7
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+
++
+
+
--
-
-
-
Right system Left system
Right
channel
Left
channel C1
L
Mono connected subwoofer
C2
C1
This drawing shows a mono multimode connected
subwoofer together with a normal stereo system.
The subwoofer crossover frequency is 95 Hz
(12 dB lowpass filter).
The stereo system crossover frequency is 140 Hz
(6 dB highpass filter).
Components with 4 ohm speakers:
C1 = 200 µF
C2 = 300 µF
L = 10 mH with low resistance, 0,5 - 0,7 ohm
Do not use the amplifiers internal lowpass cross-
over.
Use only the amplifiers internal highpass crossover
as a SUBSONIC filter adjusted to approx. 30 Hz.
2.5 BRIDGE MODE OPERATION
Subwoofers are normally connected in mono bridge
mode to the amplifier.This is done by connecting
the speaker + to the amplifiersLEFT+ terminal,
and the speaker - to the amplifiers RIGHT- termi-
nal.
Now the speaker will recieve a signal that is the sum
of the signals from each channel.
SPEAKERLOAD, BRIDGE MODE OPERATION
CAUTION!
In mono bridge mode the
speaker impedance must
never be less than 4 ohms.
The amplifiers sees a 4 ohm speaker
as a 2 ohm load.

- 5 -
PASSIVE FILTERS,LEVEL SETTING,FINAL SYSTEM SETUP
2.6 PASSIVE CROSSOVERS
For maximum use of the DLS amplifiers it´s useful to
knowalittle about passive crossoverdesign.Passive
crossovers are often used for conncting subwoofers
inmultimodeoperationorforcenterchannelspeakers.
Toremove frequencies overa certain frequency(the
crossover frequency) use a filter with a 6 or 12 dB
slope. This type of crossover is often used in
combination with a subwoofer.
6 dB lowpass crossover:
Consists of a coil connected in series with the driver.
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-
+
20 mH 10 mH 6,3 mH
2Ω64 Hz 32 Hz 50 Hz
4Ω128 Hz 64 Hz 101 Hz
8Ω256 Hz 128 Hz 203 Hz
This table shows the crossover frequency of a 6 dB
lowpassfilter at different impedancesand frequencies.
12 dB lowpass crossover:
Consists of a coil in series and a bipolar capacitor
connected in parallel with the driver.
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+
-
X-over freq. Coil Capacitor
62,5 Hz 14 mH 450µF
95 Hz 10 mH 300µF
140 Hz 6,3 mH 200µF
Valid for 4 ohm speakers only.
This type is normally used for subwoofers.
If you want to limit the lower frequency response, for
example to a stereo system in multimode operation,
a 6 dB slope crossover is perfect. Just connect a
bipolar capacitor in series with the driver.
6 dB highpass filter:
+
-
300µF 200µF 150µF
2Ω266 Hz 400 Hz 533 Hz
4Ω133 Hz 200 Hz 266 Hz
8Ω67 Hz 100 Hz 133 Hz
12 dB highpass crossover:
X-over freq. Coil Capacitor
95 Hz 10 mH 300µF
140 Hz 6,3 mH 200µF
190 Hz 4,7 mH 150µF
All valid for 4 ohm speakers.
NOTE!AllDLSamplifiersare equippedwithinternal
low- and highpass crossovers. External passive
crossovers are used only in multimode operation.
2.7 LEVEL SETTING
To adapt the amplifier to all kind of signal sources
with varying levels there are gain controls provided
on the amplifier next to the phono sockets. They
should not be used as volume controls.
Startwith a ”12 oclock”settingof the levelcontrols.If
you set the head unit volume to 75% of maximum
you should achieve a good sound without distortion.
Finda point of thelevel setting wherethedistortion is
justdiscernible.At this point slightly reduce the control
to eliminate the distorsion.
Ona multi channelamplifier like theReference200A
it´snecessarytoadjustthe levelsindiviuallytoachieve
agood soundbalancebetweenthe differentspeakers,
different speakers have different sensitivity. When
using two of the channels for subwoofer operation,
start the level adjustment on these channels. After
havingadjustedthebass level for goodperformance,
adjust the level to the front system for a good sound
balance.In multimode operationyou can´t adjustthe
subwooferlevel separately.
2.8 FINAL SYSTEM SETUP
Beforeconnectingtheamplifierto the battey, recheck
all connections. When you connect the main fuse
you will see a little spark, this is normal. But if the
fuse blows at this moment, something is wrong.
Recheck the cabling.
Turn on your head unit, the amplifier starts and the
red LED is lit. Increase the volume and make sure
all speaker works. Readjust levels and crossover
settings if necessary.The level settings might need
to be readjusted after 25 - 30 hours of use.
2.9 PROTECTION CIRCUITS
Theamplifiers have an internalhigh current protection
circuitshuttingdown the amplifierifthe current drawis
toohigh.ItisindicatedwithayellowLED.Theprotection
circuits will reset by turning the head unit off and on
again. There are two 25 Amp fuses on the front.
Disconnectthemainfusebeforereplacinganyofthese.
Always replace with the same type and value.
Theamplifiersalsohaveathermalprotectionthatturns
off the amplifier at 95 C. It will resume operation after
cooling down. If necessary install an external cooling
fan.
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-
This table shows the crossover frequency of a 6 dB
highpassfilter at different impedancesand frequencies.

- 6 -
3. INTERNAL FILTERS
3.1 Reference 100A
Reference 100A has an internal variable lowpass fil-
ter that can be switched in/out. It can be set from 50
upto 200 Hz.It also hasaninternal higpass filterthat
can be set from 15 up to 200 Hz.
LOWPASS FILTER:
The lowpass filter is normally used together with a
subwoofer to remove higher frequencies over the
crossover setting. A normal filter setting is 80 - 100
Hz.
HIGHPASS FILTER:
The highpass filter can be used in one of two ways.
Either as a subsonic filter together with a subwoofer
toremovethe lowest frequencies whichoftencauses
a rumbling bass reproduction.Anormal setting is 20
- 30 Hz.
The highpass filter can also be used together with a
front or rear stereo system to remove frequencies
below the crossover setting. In a system with a
separate subwoofer it´s common to limit the bass
reproduction to the front system. A normal setting is
between80-120Hz,butfeelfreeto try other settings.
3.2 Reference 200A
Reference 200A has the same filter configuration as
the Reference 100, but it´s doubled as this is a four
channelamplifier.
Suitablefilter settingsatdifferentconnectionsis found
in the section with connection examples.
INTERNALFILTERS,FAULTFINDING GUIDE
Ifproblemsoccourduringthe installation, or later, this
guide might help you to find out whats´s wrong.
THE AMPLIFIER IS DED:
1.Checkpowerlead,groundandremoteconnections
at the amplifier using a multi meter.
2.Check the battery terminal connections.
3.Check the power lead fuse or circuit breaker. If
fusedamage continues, inspectthe power leadfor
short circuits.
4.Check the amplifier protection fuses. Are these
broken change to new ones with the sama value.
Ifshortcircuitingcontinues,contact your local DLS
dealer.Afault 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.
AMPLIFIERPROTECTION FUSE BLOWSAT LOW
VOLUME :
1.One or morespeakercables are shorted.Makean
insulation test with a multi meter. The cables must
not have a connection to earth.
4. FAULT FINDING GUIDE
THEAMPLIFIER TURNS OFFAFTER 10 - 30 MINU-
TES.
Theamplifier is overheatingdue to inadequate venti-
lation. Check mounting position is free from
obstruction.
Do this:
1.Move the amplifier to a place with better ventil-
ation.
2.Install one or two fans to cool down the heatsink.
3.Overheating can also be caused by an impedance
loadbelowthe level permitted.Refer to thesection
about speaker loads.
NO OUTPUT FROM ONE OR MORE SPEAKERS:
Check the following:
1.Balance control position.
2.Fader control position.
3.Speaker cable connections to both 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 different
speaker, the the lead has a fault. If the problem
remains, the speaker or amplifier are at fault.
4.1 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.
CONSTANT WHINING NOISE:
Do this:
1.Ensure that allequipmentis grounded atthesame
place.
2. Checkquality of earth strapconnectionfrombattery
negative terminal to chassis.
3. Disconnect signal cables from amplifier to see if
noisedisappears.Ifsotheleads 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, re-route original cable away from source of
interference.
If noise remains regardless of cable position, try to
use so called Quasi-balanced signal cables. DLS
PRO-cables are Quasi-balanced.

- 7 -
5. CONNECTION OF Reference 100A
On the following pages you find some examples of how to connect the amplifier for different use.The
pictures show normal level and filter settings.
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
Fuse
40 A
Battery
12 volt
FM1 101,9
Button out
Remote
Pre
out
Reference 100A can be connected in many different ways:
1.As a stereo amplifier connected with a speaker system of coaxial, 2-way or 3-way type.
Two speaker systems can be connected in parallel, one front and one rear system.
2.As a subwoofer amplifier with max two 4 ohms subwoofers per channel in stereo, or max one 4 ohm
subwoofer in mono bridge mode. The built-in lowpass crossover is used.
3.In multimode with one system in stereo and one 4 ohm subwoofer connected in mono bridge mode
using a passive crossover filter for both the front system and the subwoofer. Connect as in example 5.4.
4. Using two Reference 100A you can run the front system on one of them (example 5.1) and the subwoofer
on the other (example 5.3). The highpass filter to the front system amplifier should be set at 80 - 100
Hz, or maybee higher. Make your own tests for best result.
5.1 One speaker pair
connected in stereo.
You can use all DLS coaxial, 2-way or 3-way
systems in this example.
The speaker impedance must be 4 ohm.
For power cable, speaker cable and
fuse size selection we refer to
section 2.2 - 2.4
+
+-
-
+
CONNECTIONOFReference100A

- 8 -
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
Fuse
40 A
Battery
12 volt
FM1 101,9
Button out
Remote
Pre
out
5.2 Two speaker pairs
connected in parallel stereo
You can use all DLS coaxial, 2-way or 3-way
systems in this example.
The speaker impedance must be 4 ohm.
5.3 Connection in mono with one
subwoofer in bridge mode.
You can use all DLS 4 ohm subwoofers in
this example.
Front
Rear
Button in
Remote
Pre
out
Subwoofer
4 ohm
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
FM1 101,9
Fuse
40 A
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
+
+-
+
+
+
+
-
-
-
-
CONNECTIONOFReference100A
Battery
12 volt
+
For power cable, speaker cable and fuse size selection we refer to section 2.2 - 2.4

HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
Fuse
40 A
Battery
12 volt
FM1 101,9
Button out
Remote
Pre
out
- 9 -
5.4 In multimode with a front sys-
tem in stereo and a subwoofer
in mono bridgemode.
You can use all DLS coaxial, 2-way, 3-way
systems and subwoofers in this example.
All speakers must be 4 ohm.
Subwoofer
4 ohm
200µF200µF
+
+-
+
+
WARNING!
Never run a multimode connected system with the subwoofer disconnected and still having the
300 µµ
µµ
µF capacitor connected. The output circuits in the amplifier can be damaged. Solder the
capacitor directly on the subwoofer terminals so it will be disconnected at the same time as
when you disconnect the subwoofer.
CONNECTIONOFReference100A
12
12
12
12
300µF
10 mH
For power cable, speaker cable and
fuse size selection we refer to
section 2.2 - 2.4
MULTIMODE OPERATION:
In multimode operation you can connect a speaker system in normal stereo mode and a subwoofer in
mono bridge mode on the same output terminals.
To split the signals between the speakers passive crossovers must be used.
Connect a 200 µF capacitor in series with the plus leads to the stereo system (works as a 6 dB highpass
crossover). To a two- or three way system it´s enough to connect the capacitor in series with the woofer
driver.
Connect a 12 dB lowpass crossover to the subwoofer consisting of a 10 mH coil in series and a
300µF capacitor in parallel with the subwoofer. The components used are shown in the drawing. The coil
must have a low inner resistance to avoid losses. Use the DLS 10 mH, 0,47 ohm coil with art. no 10-
42310.

- 10 -
6. CONNECTION OF Reference 200A
The following examples shows some normal ways of connecting this 4-channel amplifier.The drawings
shows normal level and filter settings.The four channels are divided in two amplifier blocks with the
signal input to the right, then the level control, the filter and to the left the speaker terminals.
Reference 200A can be connected in many different ways:
1.As a stereo amplifier with one front and one rear system.
These can be of coaxial, 2-way or 3-way type.Two speaker systems can also be connected in parallel.
For example one pair in the back doors and one pair in the hat rack connected to the rear output on the
amplifier.
2.One front (and if you want also a rear system) in the doors or dashboard, and one subwoofer in mono
bridge mode to the amplifier rear output.
3.In multimode with a front stereo system connected to front output, and a rear stereo system to rear
output together with a subwoofer in mono bridge mode using passive crossovers.
4.Astereo system connected in mono bridge mode on both front and rear output. This gives a higher
output to the speakers.
5.A3-way system can be connected with active crossover between woofers and mid/tweeters.
6.1 In stereo with one front and
one rear speaker system.
You can use all DLS coaxial, 2-way or 3-way
speaker systems in this example. Speaker
impedance must be 4 ohm.
If the head unit has only one pre out aY-cable
must be used.
For power cable, speaker cable and fuse size
selection we refer to section 2.2 - 2.4
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
FM1 101,9
Pre out rear Pre out
front
++- -
++- -
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
+
CONNECTIONOFReference200A
Battery
12 volt
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
Fuse
40 A
Toremote
on head unit
Button out

CONNECTIONOFReference200A
- 11 -
6.2 Connection of a front system in
stereo and a subwoofer in mono
bridge mode.
You can use all DLS coaxial, 2-way or 3-way
speaker systems in this example. Speaker
impedance must be 4 ohm.
If the head unit has only one pre out aY-cable
must be used.
For power cable, speaker cable and fuse size
selection we refer to section 2.2 - 2.4
++- -
Subwoofer
4 ohm
Battery
12 volt
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
Fuse
40 A
Toremote
on head unit
FM1 101,9
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
++- -
Front
Rear
You can connect one or two systems in stereo to
the speaker terminals.These are connected in
parallel.
Button in Button out
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
Pre out
front
Pre out
rear

CONNECTIONOFReference200A
- 12 -
6.3 Connection of a front and rear
stereo system and a subwoofer
connected in multimode.
You can use all DLS coaxial, 2-way or 3-way
speaker systems in this example. Speaker
impedance must be 4 ohm.
If the head unit has only one pre out aY-cable
must be used.
For power cable, speaker cable and fuse size
selection we refer to section 2.2 - 2.4
Battery
12 volt
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
Fuse
40 A
Toremote
on head unit
FM1 101,9
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
++- -
Subwoofer
4 ohm
++
--
Button out
Pre out
front
Pre out
rear
12
12
12
12
300µF
10 mH
200µF200µF
MULTIMODE OPERATION:
In multimode operation you can connect a speaker system in normal stereo mode
and a subwoofer in mono bridge mode on the same output terminals.
To split the signals between the speakers passive crossovers must be used.
Connect a 200 µF capacitor in series with the plus leads to the stereo system (works
as a 6 dB highpass crossover). To a two- or three way system it´s enough to
connect the capacitor in series with the woofer driver.
Connect a 12 dB lowpass crossover to the subwoofer consisting of a 10 mH coil in
series and a 300 µF capacitor in parallel with the subwoofer. The components used
are shown in the drawing. The coil must have a low inner resistance to avoid losses.
Use the DLS 10 mH, 0,47 ohm coil with art. no 10-42310.
WARNING!
You must never use a multimode
connected system with the subwoofer
disconnected and the 300 µµ
µµ
µF capacitor
connected to the amplifier output, this will
destroy the amplifier. Solder the capacitor
direct to the speaker terminals so it
automatically disconnects when the
subwoofer is disconnected. Button out
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200
70 90
5,5V 0,3V
2,5V
50 200

CONNECTIONOFReference200A
- 13 -
6.4 Connection of a front systerm in
stereo connected in bridge mode on
all four channels.
You can use all DLS coaxial, 2-way or 3-way
speaker systems in this example. Speaker
impedance must be 4 ohm.
If the head unit has only one pre out aY-cable
must be used.
For power cable, speaker cable and fuse size
selection we refer to section 2.2 - 2.4
+
-
Battery
12 volt
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
Fuse
40 A
Toremote
on head unit
FM1 101,9
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
+
-
The drawing shows how to connect a stereo system
in bridge mode on all four channels.
Button out Button out
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
Pre out
front
Pre out
rear

CONNECTIONOFReference200A
- 14 -
6.5 Connection of a 3-way system
using active crossover between
woofer and midrange.
You can use all DLS 3-way systems in this
example. For example DLS R 36, UP35, UP36 or
similar.
Speaker impedance must be 4 ohm.
If the head unit has only one pre out aY-cable
must be used.
For power cable, speaker cable and fuse size
selection we refer to section 2.2 - 2.4
Battery
12 volt
25
FUSE PROTECT POWER
25 A x 2
25
POWER INPUT
GND RMT BATT
Fuse
40 A
Toremote
on head unit
FM1 101,9
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
2,5V
15 200
70 90
50 200 5,5V 0,3V
OUT
HP-filter LP-filter LP-filter LEVEL
IN
SPEAKERS
+LEFT- +RIGHT-
+ BRIDGE -
SIGNAL INPUT
LEFT RIGHT
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200 50 200
70 90
5,5V 0,3V
2,5V
++- -
++
--
Button out
Pre out
front
Pre out
rear
Button in
HP-filter LP-filter LP-filter LEVEL
IN
OUT
15 200
70 90
5,5V 0,3V
2,5V
50 200
++- -
1234
1
23
4
1
23
4
1
23
4
1
23
4
1
23
4
1234
1234
1
23
4
1
23
4
1
23
4
1
23
4
1
23
4
1234
Passive high-
pass filter to
the tweeters
Mid
range
Subwoofers
Mid
range
Tweeters
Passive crossover is used for the tweeters
The crossover frequency between woofer and
midrange is 200 Hz.

- 15 -
SPECIFICATIONS
7. SPECIFICATIONS
FACTS ABOUT DLS AMPLIFIERS
MODEL Reference 100A Reference 200A
Channels 2 4
Mode AB AB
Output power at 13,5 Volt, 20 Hz - 20 kHz with 0,1% THD max:
4 ohm nominal power RMS 2 x 50 Watts 4 x 50 Watts
4ohm max power RMS 2 x 70 Watts 4 x 70 watts
2 ohm max power RMS 2 x 140 Watts 4 x 80 Watt
4ohm bridge modeRMS max 290Watts 2 x 190 Watts
Tri-mode (2 ch. in stereo & 2 connected in mono bridge mode) 2 x 70 Watts & 1 x 270 Watts
THD < 0,1% < 0,1%
S/N ratio,A-weighted > 100 dB > 100 dB
Damping factor > 200 > 200
Input impedance 15 kohm 15 kohm
Input sensitivity 0,3 - 5,5 volt 0,3 - 5,5 volt
Frequency respone 20 Hz - 20 kHz 20 Hz - 20 kHz
Crossover, highpass 15 - 200 Hz 15 - 200 Hz
Crossover, lowpass 50 - 200 Hz* 50 - 200 Hz*
* Switchable in/out
Filter slope 12 dB/octave 12 dB/octave
Fuses 25 A x 2 25 A x 2
Max cable size power: 21 mm221mm2
Max cable size speakers 6 mm26 mm2
Protection circuits Currentandthermal Currentandthermal
Powerconsumption:
Idle 0,7 A 1,0 A
Maxcurrent 50A 75A
Remote 26 mA 26 mA
Dimensions:
Width 290mm 420 mm
Heigth 65 mm 65 mm
Depth 240 mm 240 mm
Weigth 4 kg 5,6 kg
Use a 2 mm hexagon key for the remote and speaker terminals.
Use a 4 mm hexagon key for the power terminals.

- 16 -
FORYOUR OWN NOTES
Notes about the product:
Modelno:_________________________________ Serial number:_______________________________
Retailer:______________________________________________________________________________
Date of purchase: _________________________ Date of installation: ___________________________
Make your own installation notes about connections, crossover setup or just draw your own system
schematic.