DLS A2, A3, A4, A5, A6 User Manual

How to install and

operate the

DLS ULTIMATE

A-series amplifiers

A2, A3, A4, A5, A6,

and A7

Welcome!

This owners manual is written in easy english and
uses a lot of drawings to simply the installation and
use of the above amplifiers.

Your DLS amplifier must be installed correctly in
order to work well. This manual will show you how
to install the amplifier like a pro. Please read the
entire manual before beginning the installation.
Install the amplifier yourself if you feel confident with
our instructions and if you have the proper tools.
However if you feel unsure, turn over the installa­tion job to someone better suited to it.

Contents

Caution………………………..…….. 2
Installation…………………….……. 2
Tools and materials needed………. 3

Amplifier installation kit………….... 3

Routing Wires…………………….... 3

Wiring

Power terminals.....……………..…. 4

Inputs and controls…….…………... 5

Input wiring................................... 5

Input level control.......................... 5

Phase control................................ 5

Remote bass level......................... 5

Protection circuits.......................... 5

Input & controls A7…………........... 6

Crossovers / filters………………..... 7

Crossovers / filters A7.................... 8

Professional tips............................ 9

Wiring examples:

DLS A2......................................... 10-11

DLS A3......................................... 12-13

DLS A4......................................... 14-16

DLS A5......................................... 17

DLS A6......................................... 18

DLS A7......................................... 19-22

Testing……………………………….. 23
Trouble-shooting…………………….. 23
Specifications………………………... 24-25

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.







For technical assistance ask the shop where the
product was sold, or the distributor in your country.
You can always phone the DLS Helpdesk in Sweden
+ 46 31 84 00 60 or send an e-mail to [e-mail].
Information can also be found on our WEB-site
www.dls.se

Technical Assistance

Approval of electromagnetic compatability
according to the EEC Directive 95/54/EC for
DLS A2, A3, A4, A5, A6, A7.

E 11 Approval No: 10R-020962

ULTIMATE A-series

Congratulations, you have just purchased the finest mobile audio 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.

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 ears.
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

Installation

Before you begin to install

Before you begin you need to read the manual, to have
some 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.

The DLS ULTIMATE amplifiers have a great
flexibility in mounting but the best is to mount it
somewhere in the trunk.
When you select a location, do remember that the
amplifier generates a lot of heat.

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 upside down under
the hat rack.

In the amplifier case there are four mounting holes.
If the surface where you intend to mount the
amplifier isn´t big enough you can mount it on a
separate fibre board or similar. This will also isolate
the amplifier chassies from ground.

WARNING!

Check all locations and placements carefully before
making any cuts, drilling any holes or making any
connections.

Disconnect Battery

Before starting the instal­lation, always disconnect
the negative terminal of
the battery.

Professional Tip:

If amplifier installation kits are available with diffe­rent size of power cable, chose the most heavy power
cable to improve sound quality and to allow more
amplifiers to be installed now or later.

These are the minimum sizes of power cables we
recommend for the different models:

Cable length:< 1,5 m 1,5 - 4 m >4 m

A2 10 mm
A3 / A4 / A5 16 mm
A6 21 mm
A7 16 mm
A8 10 mm

The ground cable must have the same size.

Max fuse values for different cable sizes:

2

6 mm

16 mm2 (5AWG) :60 A 21 mm2 (4AWG) :100 A
33 mm2 (2AWG) :150 A 42 mm2 (1AWG) :200 A

(9 AWG) :25 A 10 mm2 (7AWG) :40 A

2

16 mm

2

21 mm

2

33 mm

2

21 mm

2

16 mm

2

21 mm

2

33 mm

2

50 mm

2

33 mm

2

21 mm

2

2

2

2

2

2

ULTIMATE A-series

Tools and material needed

Tools:



 Flat and Phillips screwdrivers




 Wire cutter




 Wire stripper




 Electric drill with drills




 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 mm2 for subwoofers
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



Routing wires

Stereo

head unit

 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
contains 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,

preferably AWG 5 = 16 mm2 or heavier. See
the table on previous page to find out what
cable size you need.

 1 pc of fuseholder to install close to the

car battery + fuse 80 Ampere, or other value
depending on what cable and amplifier you
use. See the table on page 2.

 20 feet of AWG 15 = 1,5 mm2 wire for

remote turn on / off cable from head unit.

 RCA-cable for input from head unit.

- 20 feet or 5 meter for trunk installations
You can connect all inputs together and use
only one RCA-cable, or use separate wires
to each input.

 Two min. 5 gauge ring crimp terminals –one

for connection to the battery plus and one
for the amplifier ground connection.

 Wire ties

 Insulating grommet or insulating tube

Professional Tip:

Gauge (ga) is an American measure for cable size,
also called AWG (American Wire Gauge).

CONVERSION GAUGE - mm

0 AWG = 50 mm
1 AWG = 42 mm
2 AWG = 33 mm
3 AWG = 27 mm
4 AWG = 21 mm
5 AWG = 16 mm
6 AWG = 13 mm
7 AWG = 10 mm
8 AWG = 8 mm

2

2

2

2

2

2

2

2

2

9 AWG = 6,8 mm
10 AWG = 5,3 mm
11 AWG = 4,2 mm
12 AWG = 3 mm
13 AWG = 2,7 mm
14 AWG = 2 mm
15 AWG = 1,65 mm
16 AWG = 1,3 mm

2

2

2

2

2

2

2

2

2

3

Wiring

Power, remote and fan terminals

Power terminal for A2, A5, A7

Connect the fuse holder as close to the vehicle battery
+ as possible, using AWG 5 = 16 mm2 or heavier cable
(see table on page 2). Use ring crimp terminal cable
to connect to battery +. Apply silicon grease to the
fuse to prevent corrosion.

DLS

Battery 12V

DLS FH1B or
FH2B
fuse holder

POWER IN

BATT+ REMOTE GND

ULTIMATE A-series

Remote terminal ( REM )

For RCA cable signal input:

Connect the radio power antenna lead = remote
turn on/off from the head unit 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
amplifier 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.
You can insert the cable directly into the amplifier
terminal. If there is no remote voltage available from
the stereo, you must connect to the ignition key,
through the radio, or any accessories fuse.

POWER IN

BATT+ REMOTE GND

FM1 107,3

Connect the battery cable to the +12 Volt terminal
on the amplifier. Model A2, A5 and A7 accepts AWG
4 = 21 mm2 direct into the terminal. Be sure to use
a rubber grommet or a plastic insulating tube where
the cable passes the firewall or other places where
it can easily be jammed.
Use wire ties to secure to existing cables in the
engine compartment.

Power terminal for A3, A4 & A6

POWER IN

Fuse
150 A

BAT+ REM GND

To remote
on head unit

POWER

PROTECT

+

Battery
12 volt

These models have double DC inputs. The termin­als are internally connected so it´s enough to
connect just one of them. If you want to reduce the
voltage drop to the amplifier, use both inputs. The
extra DC input can also be used for the connection
of a Power Capacitor or an extra battery. See the
example above. These amplifiers requires a
powerful fuse holder like the FH2B with an ANL 150
Amp fuse (when using 2AWG / 33 mm2 power
cable).

4

POWER IN /POWER CAP

GND FAN OUT POS+

Fan12 V

Power
capacitor

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 IN

BATT+ REMOTE GND

Fan terminal

DLS A3, A4, A5, A6 and A7 has a fan
output terminal. On A3, A4 and A6
the terminal is combined with the
extra DC-terminal. The output is
electronically controlled and starts if
the amplifiers is overheated. The ter­minal is marked "FAN”.
Use a 12 volt DC fan.The speed of
the fan increases when the tempera­ture rises. Direct the fan towards the
amplifier cooling ribs. Full speed is
obtained at 70 degrees C. NOTE!
Maximum load on the FAN terminal
is 0,5 Amp.

FAN

- +

Fan 12 V

Fuses

Use only ATC blade type
fuses. Make sure to replace
with the same value. The
value is printed above the
fuse holders. DLS A4 has no
internal fuses, use an
external fuse instead.

ULTIMATE A-series

Phase control on A5, A6 and A7

Input and controls

Input Wiring

Inputs are low level from the RCA output of the head
unit.

Low level input

Use a pair of shielded stereo audio cables with RCA
type jack. Most trunk-mount amplifiers need a 20
feet RCA cable ( appr 5 – 6 meters). Most under
the seat installations require 12 feet ( 2 – 3 meters)
RCA cables. Avoid placing the RCA cable close to
speaker cables, power cables and remote control
cable.

DLS A2 and A3 uses a single
pair of RCA inputs while
three and four channels
amplifiers like A4 & A5 uses
dual pairs of RCA inputs
A7 is a multi channel
amplifier with three separate
inputs. On next page you can see how to connect
the RCA inputs of A7.
Use high quality interconnects like the DLS SL5
PRO or SL5 Ultimate that has an effective shielding.

When you run the signal cables remember to keep
them well spaced from the wiring loom and the
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.

Input Level control

LEVEL

The phase control on can be set
continuously from 0 - 180
degrees. This is very useful when
you want to adjust the bass sound
for best front stage image. Start
at 0 and turn the control slowly

PHASE

clockwise until you experience
that the bass sound is coming
from the front. If you dont get the

0

DEGREE

result you want, also try to phase
reverse the subwoofer
connections and make a new
adjustment. On A5 you find this
control on the amplifiers left side.

Remote bass level and phase shift
control on A5, A6 and A7

A remote level and phase
shift control is included with
A5, A6 and A7 amplifiers.
You can adjust the bass
level and phase from the
front seat of your vehicle.
Connect it to the socket
marked Remote Bass
Level. When using a
remote level control you
must activate it by pushing
the switch besides the
socket, to IN-position.

Remote Bass Level &
phase shift control

Remote Bass

Level

IN

OUT

Phase

180

Level

7V
0,5V

The input level control, 7V – 0,2 V, matches the
output of your head unit to the input of the amplifier.
After installation is complete, make sure the input
of the amplifier is turned down all the way ( counter­clockwise at 7V ). Play a tape or CD, make sure all
bass or treble settings or equalizer are flat, and
turn the volume of the radio up until you just start
to hear distortion. Turn the volume control down
just a bit. On the amplifier increase the input level
control ( clockwise or to the right ) until you just
start to hear distortion, then back the level control
just a bit. Now your radio and amplifier levels are
matched.
On three/ four channel amplifiers like the A4, A5 or
A7 it´s necessary to adjust the levels indiviually to
achieve a good sound balance between the diffe­rent speakers, different speakers have different
sensitivity. When using two of the channels for
subwoofer operation, start the level adjustment on
these channels. After having adjusted the bass level
for good performance, adjust the level to the front
system for a good sound balance.

Power / Protect light

The power light (blue) is turned on when

Power
(Blue)

Protect
(Red)

The amplifiers have an internal high current
protection circuit shutting down the amplifier if the
current draw is too high. It is indicated with a LED
marked ”PROTECT”. The protection circuits will
reset by turning the head unit off and on again.
The amplifiers also have a thermal protection that
turns off the amplifier if getting to hot. It will resume
operation after cooling down. If necessary install
an external cooling fan.
There are one or two fuses on the front. Disconnect
the main fuse before replacing any of these. Always
replace with the same type and value.

the amplifier is turned on.

The protect light ( red ) is turned on
when the amplifier shuts down from
overheating, or a short circuit (speaker
failure)

5

Input and controls A7

ULTIMATE A7

FRONT SPEAKERS
+LEFT- +RIGHT-

LEVEL

3,5V

7V 0,2V

HP-filter

240

80 400
Hz

x20 change
by bottom switch

SIGNAL INPUTS

IN

FRONT REAR

LEFT RIGHT LEFT RIGHT

OUT

Input Wiring

DLS A7 has a more sofisticated input configuration and
can be connected in different ways which are described
here. Inputs are low level from the RCA output of the
car stereo head unit.

Low level input

Use a pair of shielded stereo audio cables with RCA
type jack. Most trunk-mount amplifiers need a 20
feet RCA cable ( appr 5 – 6 meters). Most under
the seat installations require 12 feet ( 2 – 3 meters)
RCA cables. Avoid placing the RCA cable close to
speaker cables, power
cables and remote control
cable.

The amplifier has separate
input sockets for front, rear
and sub channel.

There are two switches
located under the amplifier bottom plate. With these
switches you can choose different ways to connect
the RCA input sockets internally. You can use either
one, two or three separate RCA cables for the feed.
Use any of the following:

1. One RCA cable feed to all amplifier inputs.

If you want to use only one RCA cable to feed all
inputs set the switches like in the example below:

3,5V

7V 0,2V

REAR SPEAKERS
+LEFT- +RIGHT-

HP-filter

240

80 400
Hz

IN

OUT

LP-filter

IN

2

0,3 4
kHz

OUT
x10 change
by bottom switch

LEVEL

2. Two RCA cables. One to front input and the
other to rear and sub inputs.

If you want to use a separate RCA cable to the front
channels and another RCA cable to rear and sub
channels connect the cables and set the switches
like in the example below:

Separate input cables to front and rear. Then
internally connected to the sub channel.

Input
Front Rear

x 1

HP

x 20

Front
nput to
rear & sub

Amplifier front

Rear
input to
sub

LP

x 1

x 10

Input
Sub

3. Three RCA cables. One to front input, one to
rear input, and the third to sub input.

If you want to use separate RCA cables to all inputs,
set the switches like in the example below:

Sub input
separate

Sub input
from rear

A singhle RCA feeds all channels

Input
Front Rear

x 1

HP

x 20

Front
input to
rear & sub

Amplifier front

Rear
input to
sub

LP

x 1

x 10

6

Input
Sub

Sub input
separate

Sub input
from rear

Separate input cables to all channels.

Input
Front Rear

x 1

HP

x 20

Front

input to

rear & sub

Amplifier front

Rear
input to
sub

LP

x 1

x 10

Input
Sub

Sub input
separate

Sub input
from rear

Crossovers / filters (general)

DLS A-series amplifiers include highpass filter
(HP) and lowpass filters (LP).

The HP-filters can be used in one of two ways.
Either as a subsonic filter together with a
subwoofer to remove the lowest frequencies which
often causes a rumbling bass reproduction. A nor­mal setting is 20 - 30 Hz.
The HP-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 normal to limit the bass reproduction
to the front system. A normal setting is between 80

- 100 Hz, but feel free to try other settings.
If you have problems with the mid bass driver
”reaching the bottom” (the voice coil reches the
bottom pole plate) at high volumes, use the HP­filter to avoid this with a setting at 50 - 80 Hz.
A subsonic filter is actually a HP-filter.

The LP-filters are normally used when you connect
a subwoofer in bridge mode. The filter can be
switched in and out. A normal setting is 70 - 80 Hz.
The filter slope is 12 dB.

Active crossover.

A4 and A7 the LP and HP-filters have a frequency
range making it possible to use them for active
crossover to a 2-way speakersystem.

Crossovers on each model

DLS A2 och A3

DLS A2 and A3 has an adjustable LP-filter that can be
switched in/out. It can be set from 50 - 125 Hz. There
is also an adjustable HP-filter that can be switched
in/out.The filter is adjustable from 20 - 200 Hz.

ULTIMATE A-series

DLS A4

DLS A4 is equipped with adjustable HP-and LP- filt­ers on all channels. These can also be switched in/
out. The filters are equipped with a multiplication
button for improved flexibility.

The filter setup are as follows:

Front:

Lowpass (LP) 50 - 125 Hz
Highpass (HP) 20 - 200 Hz alt 60 - 600 Hz (x 3 button)

Rear:

Lowpass (LP) 45 - 200 Hz alt. 90 - 400 Hz (x 2 button)
Highpass (HP) 20 - 200 Hz

The x2 and x3 buttons are used if you run a 2-way
system with active crossover between mid-bass and
tweeter.

DLS A5

Front channels:

DLS A5 has an internal adjustable HP-filter that can
be switched in/out. It can be set from 50 up to 150
Hz.

Sub / mono channel:

The mono channel filters are for use only with one or
more subwoofers There is a LP-filter adjustable from
40 up to 90 Hz, and a subsonic filter at 25 Hz that
can be switched in-out.

DLS A6

DLS A6 is a mono amplifier for use only as a
subwoofer amplifier.
It has a fixed 25 Hz subsonic filter that can be switched
in/out.
It also has a LP-filter adjustable from 50 - 125 Hz.
This filter can not be disconnected.

DLS A7

This is a five channel amplifier with a lot of filter
possibilities described in detail on page 8.

PHASE SHIFT BUTTON ON A3:

DLS A3 has a button marked ”PHASE”. Use this
button to phase reverse the speaker output. The
button is only working when the lowpass filter is in
use. Only use this button when you want to phase
reverse a subwoofer to get the best sound.

7

ULTIMATE A7

FRONT SPEAKERS
+LEFT- +RIGHT-

LEVEL

3,5V

7V 0,2V

HP-filter

240

80 400
Hz

x20 change
by bottom switch

SIGNAL INPUTS

IN

FRONT REAR

LEFT RIGHT LEFT RIGHT

OUT

Crossovers / filters on A7

DLS A7 amplifier include highpass filter (HP),
lowpass filter (LP). On the two front channels the
HP-filter can be switched between two different
frequency ranges, likewise for the LP-filter on the
rear channels.

Highpass filter on front channels

The slope of the HP-filter is
12 dB / octave.
The filter can be switched
off if you want to run the
amplifier in full range mode.
Or use as a HP-filter for
tweeters if you want to run
a 2-way speaker system
with active crossover. The
HP x20 switch under the
bottom plate changes the
filters frequency range from
the normal 80-400 Hz to
1600 - 8000 Hz. A normal
setting is 3-5 kHz.
If you run a 3-way system
on the amplifier you can use
this filter for active cross­over between midbass and
midrange speakers, a
typical setting is 400 Hz.

Input
Front Rear

Amplifier front

HP-filter

240

80 400
Hz

x20 change
by bottom switch

Input
Sub

IN

OUT

3,5V

7V 0,2V

REAR SPEAKERS
+LEFT- +RIGHT-

HP-filter

240

80 400
Hz

IN

OUT

LP-filter

IN

2

0,3 4
kHz

OUT
x10 change
by bottom switch

LEVEL

Lowpass filter on rear channels

LP-filter

2

0,3 4
kHz

x10 change
by bottom switch

The LP-filter on the rear channels is used when
you run a 2-way or 3-way speaker system with
active crossover. It will allow low frequencies only
and blocks higher frequencies. The filter can be
switched in and out.
The normal frequency range is from 0,3 to 4 kHz.
With the LP x10 switch, under the bottom plate,
you can change the filter frequency range from the
normal to 3 - 40 kHz. A normal x-over setting is 3-4
kHz when used for active crossover in a 2-way sys­tem.
If you run a 3-way system on the amplifier you can
use this filter for active crossover between midbass
and midrange speakers. A typical setting is 400 Hz.

Input
Front Rear

Front

x 1

input to

HP

rear & sub

x 20

IN

OUT

Amplifier front

Rear
input to
sub

LP

x 1

x 10

Input
Sub

Sub input
separate

Sub input
from rear

Front

x 1

input to
rear & sub

HP

x 20

Filters on sub
channel

x 1

Rear
input to
sub

LP

x 10

Sub input
separate

Sub input
from rear

Lowpass

90

50 125
Hz

The sub channel is made only for subwoofer use
and has a variable LP-filter that can be switched
on-off. A normal setting for the LP-filter is 60-80
Hz.

8

LP x10 swith under the bottom plate

Highpass filter on rear channels

This HP-filter is normally
used as a high pass filter
blocking very low frequencies
from reaching the speakers.
It is mostly used at say 80 Hz
to protect small speakers
( like 6 inch and smaller ) from
deep bass.
The slope of the HP-filter is
12 dB / octave.
The filter can be switched off
if you want to run the amplifier
in full range mode.

HP-filter

240

80 400
Hz

IN

OUT

ULTIMATE A-series

Professional Tip:Professional Tip:

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 Cap capacitor. This can be

helpful against most noise problems.

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 cable away from source of
interference.
If noise remains regardless of cable position,
try to use so called Quasi-balanced signal
cables. DLS PRO and Ultimate-cables are
Quasi-balanced.

SPEAKER POLARITY CHECK.

All speakers in a car audio system should be
connected 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, double

check the connections instead.

Professional Tip:

Installing in 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.

Professional Tip:

Crimp connections

Purchase crimp connectors and crimping tool.
Connectors are color coded.

1. Strip 1/4 inch (6 mm) of insulation from the wire.

2. Insert into connector

3. Crimp tightly

Professional Tip:

Securing wires

Use wire ties to bundle together when possible.
(But never bundle speaker wires or signal cables
together with power wires).

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.

9

ULTIMATE A2

Wiring examples DLS A2

On the following pages you find some examples of how to connect the amplifier for different use. The
drawings show normal level and filter settings.

DLS A2 can be connected in 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 ohm subwoofers in mono bridge mode. The built-in lowpass
crossover is used. (Connect to L+ and R-).
DLS A2 has an inbuilt adjustable lowpass filter that should be set to approx. 70-80 Hz.

1. One speaker pair
connected in stereo

DLS A2

You can use all DLS coaxial, 2-way
or 3-way systems in this example.
The speaker impedance must be 4
ohm.

SIGNAL INPUT

LEFT RIGHT

HP-filter LP-filter LEVEL

100

20 200

Highpass filter
not in use.
Lowpass filter
not in use.

Pre out

FM1 107,3

IN

OUT

90

50 125

IN

OUT

3,5V

7,0V 0,2V

SPEAKERS

+LEFT- +RIGHT-

+

-

HP-filter LP-filter LEVEL

90

125

Hz

IN

OUT

20

POWER

PROTECT

100

200

Hz

FUSE

30

IN

50

OUT

POWER IN

BATT+ REMOTE GND

­+

Fuse
60 A

+

Battery
12 volt

3,5V

7,0V 0,2V

Both
buttons
in out
position

Remote

For power cable, speaker cable and fuse
size selection we refer to page 4.

Use a 2 mm hexagon key to speaker terminals.
Use a 4 mm hexagon key to DC input terminals on

10

If you have problems with the
mid bass driver ”reaching the
bottom” (the voice coil
touches the bottom pole
plate) at high volumes, use
the HP-filter to avoid this with
a setting at 50 - 80 Hz or
higher. Make your own tests.

2. Two stereo speaker pairs
connected in parallel

If you have problems with the mid bass driver ”reaching
the bottom” (the voice coil touches the bottom pole plate)
at high volumes, use the HP-filter to avoid this with a set­ting at 50 - 80 Hz or higher. Make your own tests.

SIGNAL INPUT

LEFT RIGHT

Highpass filter not
in use.
Lowpass filter not
in use.

20 200

Pre out

FM1 107,3

HP-filter LP-filter LEVEL

100

IN

OUT

90

50 125

IN

7,0V 0,2V

OUT

Remote

3,5V

SPEAKERS

+LEFT- +RIGHT-

+

-

+

-

ULTIMATE A2

DLS A2

HP-filter LP-filter LEVEL

90

125

Hz

IN

OUT

POWER

PROTECT

­+

-

+

20

100

200

Hz

FUSE

30

IN

50

OUT

POWER IN

BATT+ REMOTE GND

Fuse 60 A

+

Battery
12 volt

3,5V

7,0V 0,2V

Both
buttons
in OUT­position

3. Connection in mono
with one subwoofer in
bridge mode.

SIGNAL INPUT

LEFT RIGHT

Pre out

HP-filter LP-filter LEVEL

IN

100

20 200

FM1 107,3

OUT

90

50 125

IN

OUT

3,5V

7,0V 0,2V

SPEAKERS

+LEFT- +RIGHT-

+

-

POWER

PROTECT

FUSE

30

DLS A2

HP-filter LP-filter LEVEL

90

125

Hz

IN

OUT

20

100

200

Hz

IN

OUT

50

Button IN

POWER IN

BATT+ REMOTE GND

Button IN

Filter setting
A2:
HP-filter: 25-30

Hz
LP-filter. 70-80
Hz

Fuse 60 A

+

Battery
12 volt

3,5V

7,0V 0,2V

Remote

Subwoofer 4 ohm
You can use all DLS 4 ohm subwoofers
in this example.

For power cable, speaker cable and fuse size selection we refer to page 4.

11

ULTIMATE A3

WIRING EXAMPLES DLS A3

On the following pages you find some examples of how to connect the amplifier for different use. The
drawings show normal level and filter settings. The two channels are divided into two separate mono
amplifiers. There are separate DC inputs for each channel but they are internally connected with each other.
You can feed the amplifier with double DC feeds if you want a minimum of voltage drop, or you can also use
the extra DC-input for the connection of a Power capacitor as in the example.

DLS A3 can be connected in 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 ohm subwoofers in mono bridge mode. The built-in lowpass
filter is used. (Connect to L+ and R-).

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.

For power cable, speaker cable and
fuse size selection see page 4.

Highpass filter not in use.
Lowpass filter not in use.

SIGNAL INPUT

LEFT RIGHT

Pre out

HP-filter HP-filter LP-filter Phase LP-filter LEVEL

100

20 200

IN

OUT

90

15 125

Button out

+180

0

LEFT FUSES
30 A x 2

IN

OUT

DC-FEED DLS A3

POWER IN

BAT+ REM GND

30

30

Fuse
150 A

+

Battery
12 volt

SPEAKERS

3,5V

7,0V 0,2V

+LEFT- +RIGHT-

+

- +

POWER

PROTECT

To remote
on stereo / CD

-

POWER IN /POWER CAP

GND FAN OUT POS+

Fan12 V

RIGHT FUSES
30 A x 2

Power
capacitor

If you have problems
with the mid bass dri­ver ”reaching the bot­tom” (the voice coil
touches the bottom
pole plate) at high
volumes, use the HP­filter to avoid this with
a setting at 50 - 80 Hz
or higher. Make your
own tests.

30

30

12

FM1 107,3

+

- +

-

ULTIMATE A3

2. One or more subwoofers
in mono bridge mode

You can use all DLS subwoofers in
this example.
Speaker impedance must be 4 ohm.

For power cable, speaker cable and
fuse size selection see page 4.

Adjust the HP- and LP-filter settings
as in the drawing

HP-filter setting: 30 Hz
LP-filter setting: 60-80 Hz

Button in

DC - FEED DLS A3

LEFT FUSES
30 A x 2

30

30

Fuse
150 A

Battery
12 volt

Button in

POWER IN

BAT+ REM GND

To remote
on stereo / CD

+

POWER

PROTECT

POWER IN /POWER CAP

GND FAN OUT POS+

Fan12 V

RIGHT FUSES
30 A x 2

Power
capacitor

30

30

SIGNAL INPUT

LEFT RIGHT

Pre out

FM1 107,3

HP-filter HP-filter LP-filter PHASE LP-filter LEVEL

+180

0

IN

OUT

IN

OUT

3,5V

7,0V 0,2V

3,5V

7,0V 0,2V

IN

100

20 200

Hz

HP-filter HP-filter LP-filter Phase LP-filter LEVEL

100

20 200

OUT

50 125

IN

OUT

90

Hz

15 125

+180

0

90

With the PHASE button
you can phase shift the
phase on the speaker
output terminals.

SPEAKERS

+LEFT- +RIGHT-

Use a 2 mm hexagon key to speaker terminals.
Use a 4 mm hexagon key to DC input terminals
on A2, A3, A4

Subwoofer
4 ohm

DLS A3 is 1 ohm stable. This means that you
can connect two 4 ohm subwoofers in parallel
without damaging the amplifier. Two 4 ohm
subwoofers connected in parallel results in a 2
ohm load which the amplifier sees as a 1 ohm
load.
If you have a 4 ohm sub with dual voice coils
you can connect the coils in parallel.

13

ULTIMATE A4

WIRING EXAMPLES A4

1. Connecting a front
system in stereo and a sub­woofer in mono bridge mode.

You can use all DLS coaxial, 2-way,
3-way systems and subwoofers in this
example.
All speakers must be 4 ohm.
If the head unit has only one pre out a
Y-cable must be used.
For power cable, speaker cable and fuse
size selection see page 4.

HP-filter setting: 80-100 Hz
LP-filter not in use

Button in Button out

DC - FEED DLS A4

POWER IN /POWER CAP

GND FAN OUT POS+

Fan 12 V

25

POWER IN

BAT+ REM GND

POWER

PROTECT

LEFT FUSES
25 A x 2

25

Fuse
150 A

To remote
on stereo / CD

+

Battery
12 volt

If you use both DC-inputs for the DC feed,
connect a Fuse block with two 70 Amp fuses,
one for each input.

RIGHT FUSES
25 A x 2

25

Power
capacitor

25

FRONT INPUTS

LEFT RIGHT

Pre out
front

REAR SPEAKERS

+LEFT- +RIGHT-

HP-filter HP-filter HP-filter LP-filter LP-filter LEVEL

100

20 200

3X

IN

OUT

50 125

1X

IN

90

OUT

Button out

HP-filter setting: 30 Hz
LP-filter setting: 70-80 Hz

Button in

LEVEL LP-filter LP-filter LP-filter HP-filter HP-filter

3,5V

7V 0,2V

IN

OUT

Button in

2X

20 200

1X

100

7,0V 0,2V

IN

OUT

3,5V

100

20 200

FRONT SPEAKERS

+LEFT- +RIGHT-

+

FM1 107,3

Pre out
rear

REAR INPUTS

LEFT RIGHT

-

+-

Use a 2 mm hexagon key
to speaker terminals.
Use a 4 mm hexagon key
to DC input terminals on
A2, A3, A4

14

Subwoofer
4 ohm

Button out

DLS A4 is 1 ohm stable. This means that you can connect two 4
ohm subwoofers in parallel without damaging the amplifier. Two 4
ohm subwoofers connected in parallel results in a 2 ohm load which
the amplifier sees as a 1 ohm load.
If you have a 4 ohm sub with dual voice coils you can connect the
coils in parallel.

2. A front system connected
in stereo 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
a
Y-cable must be used.
For power cable, speaker cable and
fuse size selection see page 4.

DC-FEED DLS A4

LEFT FUSES
25 A x 2

25

Fuse
150 A

POWER IN

BAT+ REM GND

25

+

Battery
12 volt

POWER

PROTECT

To remote
on stereo / CD

ULTIMATE A4

POWER IN /POWER CAP

GND FAN OUT POS+

Fan 12 V

RIGHT FUSES
25 A x 2

Power
capacitor

25

25

HP-filter not in use.
LP-filter not in use.

Button out Button out

FRONT INPUTS

LEFT RIGHT

HP-filter HP-filter HP-filter LP-filter LP-filter LEVEL

100

20 200

3X

1X

IN

OUT

Pre out
front

Button out

HP-filter not in use.
LP-filter not in use.

Button out

IN

90

50 125

OUT

Button out

If you use both DC-inputs for the DC feed,
connect a Fuse block with two 70 Amp fuses,
one for each input.

If you have problems
with the mid bass dri­ver ”reaching the bot­tom” (the voice coil
touches the bottom
pole plate) at high

3,5V

7,0V 0,2V

FRONT SPEAKERS

+LEFT- +RIGHT-

volumes, use the HP­filter to avoid this with
a setting at 50 - 80 Hz
or higher. Make your

+

own tests.

-

FM1 107,3

Pre out
rear

REAR SPEAKERS

+LEFT- +RIGHT-

-

+

LEVEL LP-filter LP-filter LP-filter HP-filter HP-filter

IN

3,5V

7V 0,2V

OUT

2X

20 200

1X

100

IN

OUT

100

20 200

Button out

Use a 2 mm hexagon key to speaker terminals.
Use a 4 mm hexagon key to DC input terminals on A2, A3, A4

REAR INPUTS

LEFT RIGHT

15

3. Connecting a 3-way

5

5

5

5

5

5

5

5

system using active crossover
between woofer and midrange.

DC-FEED DLS A4

LEFT FUSES
25 A x 2

POWER IN

BAT+ REM GND

POWER

ULTIMATE A4

POWER IN /POWER CAP

GND FAN OUT POS+

RIGHT FUSES
25 A x 2

You can use all 3-way speaker
systems in this example. You can also use
any 2-way system in combination with a
separate mid bass speaker.
Speaker impedance must be 4 ohm.
If the head unit has only one pre out a
Y-cable must be used.

For power cable, speaker cable and fuse
size selection see page 4.

HP-filter setting: 400 Hz
LP-filter not in use

Button in Button out

FRONT INPUTS

LEFT RIGHT

HP-filter HP-filter HP-filter LP-filter LP-filter LEVEL

3X

IN

OUT

90

50 125

100

20 200

1X

IN

OUT

25

25

PROTECT

Fuse
150 A

To remote
on stereo / CD

+

Battery
12 volt

Fan 12 V

If you use both DC-inputs for the DC feed,
connect a Fuse block with two 70 Amp fuses,
one for each input.

FRONT SPEAKERS

3,5V

7,0V 0,2V

+LEFT- +RIGHT-

25

Power
capacitor

25

FM1 107,3

HP-filter not in use

LP-filter setting: 400 Hz

Button in

REAR SPEAKERS

+LEFT- +RIGHT-

+

LEVEL LP-filter LP-filter LP-filter HP-filter HP-filter

3,5V

7V 0,2V

-

+-

Button in

Button out

IN

OUT

Button in

Bass/midbass
drivers

234

Pre out

234

234

234

234

+

-

Passive crossover boxes

234

234

for tweeters and midrange

234

+

-

Midrange
drivers

front

+

-

+

Tweeters

-

If you have problems
with the mid bass dri­ver ”reaching the bot­tom” (the voice coil

2X

20 200

1X

100

IN

OUT

100

20 200

REAR INPUTS

LEFT RIGHT

touches the bottom
pole plate) at high
volumes, use the HP­filter to avoid this with
a setting at 50 - 80 Hz
or higher. Make your
own tests.

Use a 2 mm hexagon key to speaker terminals.
Use a 4 mm hexagon key to DC input terminals on A2, A3, A4

16

ULTIMATE A5

WIRING EXAMPLES A5

Connection of a front system in
stereo and a subwoofer in mono.

DC - FEED DLS A5

FUSES 30 A x 3

30

30

Fuse
100 A

HP-filter setting: 80 Hz

POWER IN

BATT+ REM GND

30

+

Battery
12 volt

To remote
on stereo / CD

You can use all DLS coaxial, 2-way, 3-way systems and
subwoofers in this example.
All speakers must be 2-4 ohm. If the head unit has only one
pre out, a Y-cable must be used.
For power cable, speaker cable and fuse size selection see
page 4.

FAN

POWER

- +

PROTECT

Use a 2 mm hexagon key to speaker and
fan terminals. Use a 2,5 mm hexagon key
to the remote terminal. Use a 3 mm
hexagon key to DC input terminals.

DLS A5 front channels are 2 ohm stable. DLS
A5 mono channel is 1,33 ohm stable. This
means that you can connect three 4 ohm
subwoofers in parallel without damaging the
amplifier. If you have a 4 ohm sub with dual
voice coils you can connect the coils in

Fan 12 V

parallel.

Subsonic-filter setting: IN (fixed 25 Hz)
LP-filter setting: 70-80 Hz

Button in

REAR SPEAKERS

+LEFT- +RIGHT-

+

-

+-

Left side of A5 (part of)

Remote

Bass level
/ Phase

LEVEL HP-filter

IN

3,5V

7V 0,2V

OUT

IN

Phase

0

+180

OUT

110

80 150
Hz

Pre out
front

Remote Bass
Level & Phase
control

SIGNAL INPUTS

FRONT SUB
LEFT RIGHT LEFT RIGHT

FM1 107,3

PHASE SHIFT CONTROL

The Phase shift control is variable from 0 to +180
degrees. With this control you can fine tune your
subwoofers so they play in phase with the rest of your
system.

REMOTE BASS LEVEL & PHASE SHIFT

A remote bass level & phase shift control is included.
This allows you to adjust the bass level and phase shift
from the front seat of your car.
Connect it to the socket marked Remote Bass Level.

Phase

Level

When using a remote level control you must activate it
by pushing the switch on the right side of the socket, to
IN-position.

Button in

Subsonic Filter

IN

OUT

Pre out
sub or
rear

Low-Pass LEVEL

65

40 90

3,5 V

7,0 V 0,2 V

SUBWOOFER

+ SPEAKER -

Subwoofer
4 ohm

17

ULTIMATE A6

WIRING EXAMPLES A6

Connection of two 4 ohm
subwoofers

You can use all DLS subwoofers in this example.
All speakers must be 2-4 ohm. If you have
subwoofer with dual voice coils, connect one
voice coil to each output terminal. For power
cable, speaker cable and fuse size selection we
refer to page 2.

PHASE SHIFT CONTROL

The Phase shift control is variable from 0 to
+180 degrees. With this control you can fine
tune your subwoofers so they play in phase with
the rest of your system.
This feature is extremely useful when fine tuning
the different speakers and amplifiers of a SPL
competition vehicle.

REMOTE BASS LEVEL & PHASE SHIFT

A remote bass level & phase shift control is
included. This allows you to adjust the bass level
and phase shift from the front seat of your car.
Connect it to the socket marked Remote Bass
Level. When using a remote level control you
must activate it by pushing the switch on the left
side of the socket, to IN-position.

DC - FEED DLS A6

POWER IN /POWER CAP

GND FAN OUT POS+

35

Battery
12 volt

POWER IN

BAT+ REM GND

To remote
on stereo / CD

+

POWER

PROTECT

FUSES
35 A x 2

35

Fuse
150 A

Subsonicfilter setting: IN (fixed 25 Hz)
LP-filter setting: 70-80 Hz

Button in

Fan12 V

FUSES
35 A x 2

35

Power
capacitor

35

SIGNAL INPUT

LEFT RIGHT

FM1 107,3

Sub Remote Bass

sonic Level

IN

IN

OUT

OUT

Phase

Phase LP-filter LEVEL

+90

90

0 +180

50 125

Level

7,0V 0,2V

Remote Bass
Level & Phase
control

DLS A6 has a built-in fan for cooling. The fan is
mounted in the bottom plate of the amplifier.
To get the best performance and cooling, mount the
amplifier on spacings. Doing so the fan can get fresh
air for best possible cooling.
The amplifier becomes very hot, especially when
loaded down to 1 ohm. When using 1,33 and 1 ohm
loads we recommend the use of external cooling fans
as well.

SPEAKERS

3,5V

+ - + -

Subwoofer
4 ohm

Subwoofer
4 ohm

DLS A6 is 1 ohm stable. This means that you can
connect four 4 ohm subwoofers in parallel without
damaging the amplifier. If you have a 4 ohm sub
with dual voice coils you can connect the coils in
parallel, one coil to each amplifier output.

NOTE!
The speaker output terminals are internally
connected in parallel. This is a mono amplifier
so it is not able to connect the outputs in bridge
mode. The double terminals are only for easier
connection of more than one subwoofer.

18

ULTIMATE A7

WIRING EXAMPLES A7

Example 1: Speaker wiring with front speakers, rear speakers and one or
more subwoofers

HP-filter: 80 Hz

Button in

FRONT SPEAKERS
+LEFT- +RIGHT-

LEVEL

3,5V

7V 0,2V

HP-filter

240

80 400
Hz

x20 change
by bottom switch

SIGNAL INPUTS

IN

FRONT REAR

LEFT RIGHT LEFT RIGHT

OUT

Pre out
front

+

-

+-

FM1 107,3

DC - FEED DLS A7

For DC-feed, see page 4

If you have problems with the mid bass driver
”reaching the bottom” (the voice coil touches the
bottom pole plate) at high volumes, use the HP­filter to avoid this with a setting at 50 - 80 Hz or
higher. Make your own tests.

A7 IN BRIDGE MODE

You can connect the stereo channels in
bridge mode if you prefer. Connect
between L+ and R- on the respective
channel pair.Use Y-cables to feed the same
signal to FRONT left& right channel pair,
respective REAR left & rigth channel pair.

HP-filter: 80 Hz
LP-filter not in use.

HP-filter

240

80 400
Hz

Pre out
rear

SIGNAL INPUT

LEFT SUB RIGHT

Button outButton in

LP-filter

IN

OUT

IN

2

0,3 4
kHz

OUT
x10 change
by bottom switch

LP-filter: 70- 80 Hz

Remote Bass

Level

IN

OUT

PHASE

90

O 180
Degree

LEVEL

3,5V

7V 0,2V

+

FILTER

Low-pass LEVEL

90

50 125

REAR SPEAKERS
+LEFT- +RIGHT-

-

+-

SUB-WOOFER
+ SPEAKERS -

3,5V

7,0V 0,2V

Filter settings:
Front: HP-filter 80 Hz or fullrange
Rear: HP-filter 80 Hz or fullrange

LP-filter OUT

Sub: LP-filter 70-80 Hz

Use one, two or three RCA-cables
for signal from head unit to amplifier.
See page 6 for detailed instructions

Level

FM1 107,3

Phase

Remote Bass Level
& Phase control

Switch settings in this example
HP: x1
LP: x1

Input
Front Rear

x 1

HP

x 20

Input to
front, rear
& sub

Amplifier front

Input to
rear
& sub

LP

x 1

x 10

Input
Sub

Sub input
separate

Sub input
common

Subwoofer
2 - 4 ohm

19

ULTIMATE A7

WIRING EXAMPLES A7

Example 2: Speaker wiring with active crossover to a front speaker system
and one or more subwoofers

HP-filter setting:

4 kHz

Button in

FRONT SPEAKERS
+LEFT- +RIGHT-

+

LEVEL

3,5V

7V 0,2V

x20 change
by bottom switch

-

+-

Tweeters with active high-pass
x-over setting at 4 kHz

HP-filter

240

80 400
Hz

SIGNAL INPUTS

IN

FRONT REAR

LEFT RIGHT LEFT RIGHT

OUT

Pre out
front

FM1 107,3

HP-filter setting: 80 Hz
LP-filter setting: 4 kHz.

Button in

HP-filter

240

80 400
Hz

IN

OUT

LP-filter

IN

2

0,3 4
kHz

OUT
x10 change
by bottom switch

Pre out
rear

Midbass/midrange speakers with
active low-pass x-over setting
at 4 kHz

LP-filter: 70- 80 Hz

Button in

3,5V

7V 0,2V

REAR SPEAKERS
+LEFT- +RIGHT-

LEVEL

+

-

+-

DC - FEED DLS A7

For DC-feed, see page 4

If you have problems with the mid
bass driver ”reaching the bottom”
(the voice coil touches the bottom
pole plate) at high volumes, use
the HP-filter to avoid this with a
setting at 50 - 80 Hz or higher.
Make your own tests.

Filter settings:
Front: HP-filter 4 kHz with x20-

switch in x20 position

Rear: HP-filter 80 Hz or fullrange

LP-filter IN, setting 4 kHz with
x10 switch in position x1

Sub: LP-filter 70-80 Hz

Use one, two or three RCA-cables
for signal from head unit to amplifier.
See page 6 for detailed instructions

20

SIGNAL INPUT

LEFT SUB RIGHT

FM1 107,3

Remote Bass

Level

IN

OUT

Phase

PHASE

90

O 180
Degree

Level

FILTER

Low-pass LEVEL

90

50 125

Remote Bass Level
& Phase control

Switch settings in this example
HP: x20
LP: x1

Input
Front Rear

x 1

HP

x 20

Input to
front, rear
& sub

Amplifier front

Input to
rear
& sub

LP

x 1

x 10

3,5V

7,0V 0,2V

SUB-WOOFER
+ SPEAKERS -

Subwoofer
2 - 4 ohm

Input
Sub

Sub input
separate

Sub input
common

ULTIMATE A7

WIRING EXAMPLES A7

Example 3: System with front speaker system, rear fill speakers and one
or more subwoofers

Highpass filter 80 Hz

Button in

FRONT SPEAKERS
+LEFT- +RIGHT-

Filter
box

+

-

+

-

LEVEL

7V 0,2V

Filter
box

+

-

+

-

Two-way front system

3,5V

HP-filter

IN

240

80 400
Hz

OUT

x20 change
by bottom switch

Pre out
front

SIGNAL INPUTS

FRONT REAR

LEFT RIGHT LEFT RIGHT

FM1 107,3

Highpass filter 125 Hz
Lowpass filter setting 6 kHz

HP-filter

240

80 400
Hz

IN

OUT

0,3 4
kHz

LP-filter

IN

2

OUT
x10 change
by bottom switch

Pre out
rear

Rear fill speakers 125 Hz to 6 kHz

Lowpass filter 70- 80 Hz

Button inButton in

LEVEL

3,5V

7V 0,2V

REAR SPEAKERS
+LEFT- +RIGHT-

+

-

+-

DC - FEED DLS A7

For DC-feed, see page 4

If you have problems with the mid
bass driver ”reaching the bottom”
(the voice coil touches the bottom
pole plate) at high volumes, use
the HP-filter to avoid this with a
setting at 50 - 80 Hz or higher.
Make your own tests.

Filter settings:
Front: HP-filter 80 Hz or fullrange
Rear: HP-filter 125 Hz

LP-filter IN. Setting 6 kHz with
x10 switch in position x10

Sub: LP-filter 70-80 Hz

Use one, two or three RCA-cables for
signal from head unit to amplifier.
See page 5 for detailed instructions

SIGNAL INPUT

LEFT SUB RIGHT

FM1 107,3

Remote Bass

Level

IN

OUT

Phase

PHASE

90

O 180
Degree

Level

FILTER

Low-pass LEVEL

Remote Bass Level
& Phase control

Switch settings in this example
HP: x1
LP: x10

Input
Front Rear

x 1

HP

x 20

Input to
front, rear
& sub

Amplifier front

Input to
rear
& sub

LP

x 1

90

50 125

7,0V 0,2V

x 10

3,5V

SUB-WOOFER
+ SPEAKERS -

Subwoofer
2 - 4 ohm

Input
Sub

Sub input
separate

Sub input
common

21

ULTIMATE A7

WIRING EXAMPLES A7

Example 4: Speaker wiring with acive/passive crossover to a 3-way front
speaker system and one or more subwoofers

HP-filter setting:

400 Hz

Button in

3,5V

HP-filter

240

80 400
Hz

x20 change
by bottom switch

FRONT SPEAKERS
+LEFT- +RIGHT-

Filter
box

+

-

+

-

LEVEL

7V 0,2V

Filter
box

+

-

+

-

Midrange and tweeters with active
highpass x-over setting at 400 Hz.
Passive x-over between
midbrange and tweeters

DC - FEED DLS A7

For DC-feed, see page 4

If you have problems with the mid
bass driver ”reaching the bottom”
(the voice coil touches the bottom
pole plate) at high volumes, use
the HP-filter to avoid this with a
setting at 50 - 80 Hz or higher.
Make your own tests.

SIGNAL INPUTS

IN

FRONT REAR

LEFT RIGHT LEFT RIGHT

OUT

Pre out
front

FM1 107,3

SIGNAL INPUT

LEFT SUB RIGHT

FM1 107,3

HP-filter setting: 80 Hz
LP-filter setting: 400 Hz.

Button InButton in

HP-filter

240

80 400
Hz

IN

OUT

0,3 4
kHz

LP-filter

IN

2

OUT
x10 change
by bottom switch

Pre out
rear

Midbass with active lowpass x-

over setting at 400 Hz.

LP-filter: 70- 80 Hz

Remote Bass

Level

IN

OUT

Phase

PHASE

90

O 180
Degree

Level

3,5V

7V 0,2V

REAR SPEAKERS
+LEFT- +RIGHT-

LEVEL

+

FILTER

Low-pass LEVEL

90

50 125

-

+-

SUB-WOOFER
+ SPEAKERS -

3,5V

7,0V 0,2V

Filter settings:
Front: HP-filter 400 Hz with x20-

switch in x1 position

Rear: HP-filter 80 Hz or fullrange

LP-filter IN, setting 400 Hz with
x10 switch in position x1

Sub: LP-filter 70-80 Hz

Use one, two or three RCA-cables for
signal from head unit to amplifier.
See page 5 for detailed instructions

22

Remote Bass Level
& Phase control

Switch settings in this example
HP: x1
LP: x1

Input
Front Rear

x 1

HP

x 20

Amplifier front

LP

x 1

x 10

Subwoofer
2 - 4 ohm

Input
Sub

ULTIMATE A7

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 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
speakers should operate. if not, check wiring
connections at amplifier and speakers.

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.

Troubleshooting

If problems occour during the installation, or later,
this guide might help you to find out whats´s wrong.

THE AMPLIFIER IS DEAD:

1. Check power lead, ground and remote

connections 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 multimeter.

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.

THE AMPLIFIER TURNS OFF AFTER 10 - 30 MINU­TES.

The amplifier is overheating due to inadequate venti­lation. 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 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 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 lead has a fault.
If the problem remains, the speaker or amplifier
are at fault.

23

SPECIFICATIONS A2 to A6

Model A2 A3 A4

Number of channels 2 2 4
Working mode AB AB AB

Power output at 13,8 Volt, 20 Hz - 20 kHz, THD max 0,1%:

Power output in 4 ohm 2 x 85 W 2 x 150 W 4 x 85 W
Power output in 2 ohm 2 x 145 W 2 x 270 W 4 x 145 W
Power output in 1 ohm 2 x 220 W 2 x 425 W 4 x 220 W
Power output, 4 ohm bridged 290 W 550 W 2 x 250 W
Power output, 2 ohm bridged 450 W 870 W 2 x 400 W
Power output, 1,33 ohm bridged 1000 W
THD < 0,1% < 0,1% < 0,1%
S/N ratio, A-weighted > 100 dB > 100 dB >100 dB
Damping factor > 200 > 200 > 200
Input impedance 10 kohm 10 kohm 10 kohm
Input sensitivity 0,2 - 7 volt 0,2 - 7 volt 0,2 - 7 volt
Filter highpass 20 - 200 Hz* 20 - 200 Hz* see below
Filter lowpass 50 - 125 Hz* 50 - 125 Hz* ”
* can be switched in/out
Filter slope 12 dB/octave 12 dB/octave 12 dB/octave
Fuses 30 A x 2 30 A x 4 no internal fuses
Max cable size, DC-terminal 21 mm
Max cable size, speaker terminal 10 mm2 (7AWG) 16 mm2 (5AWG) 10 mm2 (7AWG)
Protection Current & thermal Current & thermal Current & thermal

Power consumption:

Idle 0,6 A 1,1 A 1,5 A
Maximum 60 A 140 A 95 A

Dimensions:

Width x Height x Depth (mm) 265 x 73 x 240 410 x 73 x 240 465 x 73 x 240

(inch) 10,43 x 2,87 x 9,45 16,15 x 2,87 x 9,45 18,3 x 2,87 x 9,45

2

(4AWG) 21 mm2 (4AWG) 21 mm2 (4AWG)

Filter configuration DLS A4
Front: Rear:

Lowpass 50 - 125 Hz Lowpass 45 - 200 Hz or 90 - 400 Hx (x 2 button)
Highpass 20 - 200 Hz or 60 - 600 Hz (x 3 button) Highpass 20 - 200 Hz

Model A5 A6

Number of channels 3 1
Working mode AB AB

Power output at 13,8 Volt
Front channels:

Power output in 4 ohm 2 x 85 W
Power output in 2 ohm 2 x 100 W

Sub channel:

Nominal power RMS in 4 ohm 300 W 500 W
Typical power RMS in 2 ohm 500 W 870 W
Typiocal power RMS in 1 ohm 780 W 1200 W

THD < 0,1% <0,1%
S/N ratio, A-weighted > 100 dB >100 dB
Damping factor > 200 > 200
Input impedance 10 kohm 10 kohm
Input sensitivity 0,2 - 7 volt 0,2 - 7 volt
Filter highpass 50 - 150 Hz / 6 dB
Filter lowpass 40 - 90 Hz / 12 dB 50 - 125 Hz / 12 dB
Subsonic filter 25 Hz /18 dB 25 Hz / 18 dB
Phase control 0-180 degree continious 0-180 degree continious
Remote bass level & phase control Included Included
Fuses 3 x 30 A 4 x 35 A
Max cable size, DC terminal 21 mm
Max cable size, speaker terminal 6/10 mm
Protection Current & thermal Current & thermal

Power consumption:

Idle 0,5 A 0,5 A
Maximum 90 A 140 A

Dimensions:

Width x Height x Depth (mm) 410 x 73 x 240 410 x 73 x 240

(inch) 16,15 x 2,87 x 9,45 16,15 x 2,87 x 9,45

2

(4AWG) 21 mm2 (4AWG)

2

(10/7AWG) 10 mm2 (7AWG)

24

SPECIFICATIONS A7

Model A7

RMS output per channel at 13,8 volts, 20 Hz - 20 kHz , < 0,1% distortion.

Front and rear channels:

Power output in 4 ohm 4 x 60 W
Power output in 2 ohm 4 x 100 W
Power output in bridge mode 2 x 200 W

Subchannel:

Power output in4 ohm 1 x 300 W
Power output in 2 ohm 1 x 440 W
Power output in 1 ohm 1 x 600 W
S / N ratio, A-weighted >100 dB
Damping factor >200
Input impedance >10k
Input sensitivity 0,3 - 7V
Fan output terminal Yes (max 500 mA)
Remote bass & phase control Yes
Fuses 20A x 2, 35A x2
Max cable size, DC-terminal 21 mm
Max cable size, speaker terminal 10 mm
Protection Current & thermal

2

(4AWG)

2

(7AWG)

ULTIMATE A7

Filter configuration DLS A7

Channel 1&2:

Highpass: 80 - 400 Hz
or 1,6 - 8 kHz (x20 switch)

Channel 3&4:

Highpass: 80-400 Hz
Lowpass: 0,3-4 kHz
or 3 - 40 kHz (x10 switch)

Power consumption:

Idle 1,1 A
Maximum 120 A

Dimensions (mm) 605x240x73
Dimensions (inch) 23,82x 9,45x2,87
Weight 8,1 kg ( 17,86 lb)

Subchannel:

Lowpass: 50 - 125 Hz

We follow a policy of continuous advancement in
development.
For this reason all or part of specifications & designs
may be changed without prior notice.

25

DLS Svenska AB

P.O. Box 13029

S-40251 Göteborg, Sweden

Tel: [phone]

Fax: [phone]

E-mail: [e-mail]

www.dls.se