DLS Svenska AB Stereo Amplifier DLS CA12 User Manual

Contents  
Specifications................................  
Features……………………………..  
Installation…………………….…….  
Trouble-shooting……………………  
Tools and materials needed……….  
Amplifier installation kit…………....  
Routing Wires……………………....  
Wiring  
Power and Outputs……………..….  
Inputs and controls………………...  
Input level control..........................  
Crossovers…………......................  
Phase control.....………………...…  
Speaker wiring.............………….….  
Testing..........................................  
Professional tips……………………..  
1
2
2
2
3
3
3
How to install and  
operate the  
DLS CA12  
4
5
5
5
6
6
6
7
500 Watts  
mono amplifier  
Welcome!  
This owners manual is written in easy english and  
uses a lot of drawings to simply the installation and  
use of the above amplifier.  
Specifications  
DLS CLASSIC  
CA12  
Your DLS amplifier must be installed correctly in or-  
der 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.  
Number of channels  
Power output:  
R.M.S. output in 4 ohm (0,1% THD) 1 x 220 W  
R.M.S. output in 2 ohm (0,4% THD) 1 x 400 W  
R.M.S. output in 1 ohm (0,5% THD) 1 x 500 W  
All above output power ratings at 13,8 Volt  
1
Signal to noise ratio,A-weighted  
Damping factor  
>100 dB  
>100  
Frequency response  
Input impedance, low level  
Input impedance, high level  
Input sensitivity  
RCA output  
Phase control 0-180 degrees variable yes  
Filter subsonic  
10 Hz - 35 kHz  
10 kohm  
100 ohm  
0,25 - 5V  
yes  
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.  
15 - 150 Hz  
Filter lowpass 12/24 dB slope  
Power consumption, idle  
Maximum current draw  
Built-in fan cooling in bottom plate  
Fuse  
Dimensions (mm)  
Dimensions (inch)  
Weight  
50 - 500 Hz  
0,8 A  
80 A  
yes  
2 x 30A  
67x295x250  
2,63x11,6x9,84  
3,8 kg (8,4 lb)  
Technical Assistance  
For technical assistance ask the shop where the  
product was sold or the distributor in your very coun-  
try.  
You can always phone the DLS Helpdesk in Sweden  
+ 46 31 84 00 60 or send an e-mail to [email protected].  
Information can also be found on our WEB-site  
Approval of electromagnetic compatability according  
to the EEC Directive 95/54/EC  
DLS Svenska AB  
P.O. Box 13029  
S-40251 Göteborg, Sweden  
Tel: +46 31 840060  
Fax: +46 31 844021  
E 13 Approval No: 022495  
We follow a policy of continuous advancement in  
development. For this reason all or part of specifications  
& designs may be changed without prior notice.  
 
CA12  
Routing wires  
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 corrosion  
Stereo  
head unit  
Material:  
Speaker wire: minimum  
12 AWG = 4 mm2 for subwoofers  
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  
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,  
minimum AWG 5 = 16 mm2 or heavier.  
1 pc of fuseholder to install close to the  
car battery + fuse 60 Ampere.  
20 feet of AWG 15 = 1,5 mm2 wire for  
remote turn on / off cable from radio.  
RCA-cable for input from radio.  
- 20 feet or 5 meter for trunk installations  
-12 feet or 2 – 3 meter for under seat  
installations  
High current draw  
Two ring crimp terminals –one  
The CA12 is a mono amplifier with high power output.  
The current draw is also high so you must make sure  
that your vehicles power system (battery and alternator)  
can provide all the power you need. If you have a bad  
battery or alternator in can result in a poor sound or  
even worse, a broken battery or alternator.  
for connection to the battery plus and one  
for the amplifier ground connection.  
Two heavy fork crimp terminals to connect  
+ and – to amplifer – but you do only need  
them if you use heavy cable or to make the  
installation look nicer.  
Four to eight fork crimp terminals to  
connect the speaker cables – but you do  
only need them if you use heavy cables or  
want the installation to look nicer.  
One fork crimp terminal to connect the  
remote wire to the amplifier, but you need it  
only to make it look nicer.  
Four to eight splicers to connect speaker  
cables to high level input cable, if high level  
input is used.  
Professional Tip:  
If amplifier installation kits are available with diffe-  
rent 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.  
If possible buy AWG 4 = PL 21 mm2 (or heavier)  
cable for best performance.  
Wire ties  
Insulating grommet or insulating tube  
3
 
CA12  
Remote terminal ( REM )  
For RCA cable signal input:  
Wiring  
Power and Outputs  
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.  
Power terminal ( +12V)  
You can either use the built in remote cable in the  
RCA cable itself or use a separate cable.  
Connect the fuse holder as close to the vehicle  
battery + as possible, using AWG5 = 16 mm2 or  
heavier cable. Use ring crimp terminal cable to  
connect to battery +. Apply silicon grease to the  
fuse to prevent corrosion.  
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 either use a crimp fork terminal or 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.  
Use a fuse holder for AGU fuses  
like the DLS FH1B. Fuse value  
60 A if you use a AWG5 cable.  
+12V REM GND  
For High Level input:  
We recommend you to connect the remote wire as  
described above.  
The amplifier will be turned on/ turned off by the  
high level input voltage. This is done when the Hi  
level/Low level switch is set to Hi level position.  
There is a small disadvantage that this function  
gives soft turn on operation but some plop sound  
when switching off.  
DLS  
DLS FH 1B  
fuse holder  
Connect the battery cable to the +12 Volt on the  
amplifier. If you want to improve the power capacity  
you can add a Power capacitor of 1 Farad in parallel  
with the DC input.  
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  
room.  
You do not have to connect any remote voltage  
when using Hi level input.  
Max. fuse value for different cable sizes:  
+12V REM GND  
6 mm2 (9 AWG) :25 A  
16 mm2 (5AWG) :60 A  
33 mm2 (2AWG) :150 A  
10 mm2 (7AWG) :40 A  
21 mm2 (4AWG) :100 A  
42 mm2 (1AWG) :200  
Ground Terminal ( GND )  
Connect to a good chassis ground. The ground  
connection should be clean, unpainted metal to prov-  
ide 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 Light / Protect light  
The power light (green ) comes on when  
the amplifier is turned on.  
Power  
(Green)  
+12V REM GND  
The protect light ( red ) comes on when  
the amplifier shuts down from  
overheating or short circuit.  
Protect  
(Red)  
Fuses  
Use only 30 ampere  
ATC blade type fuses.  
CA12 uses two 30  
ampere fuses.  
4
 
CA12  
Input and controls  
Input Level control  
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 to prefer for the best sound  
quality.  
The input level control, 5V – 0,25  
V, matches the output of your ra-  
dio to the input of the amplifier.After  
installation is complete, make sure  
the input of the amplifier is turned  
down all the way ( counter-  
clockwise at 5V ). 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.  
Important  
Level  
Use either the low level or the high level input, do  
not use both at same time.  
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. Connect to in-  
put socket A & B.  
5 V  
0,25 V  
High Level Input  
Subsonic filter  
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 polarity of plus  
and minus, you can change the phase.  
The Subsonic filter blocks  
the very deepest frequencies  
from reaching the subwoofers.  
It has a variable frequency  
from 15 to 50 Hz.Atypical set-  
ting is 25-30 Hz when used  
Subsonic  
40Hz 100Hz  
150Hz  
15Hz  
High Input  
White  
: A ch.+  
: A ch.-  
: B ch.-  
: Bch.+  
Off On  
with subwoofers.The filter can  
be switched IN-OUT.  
White/Black  
Grey/Black  
Grey  
Low Pass Filter  
Hi level input plug on amp.  
The LPF ( low pass filter )  
mostly used for subwoofers. It  
will allow low frequencies only  
and blocks higher frequencies.  
A typical setting is 50 – 80 Hz.  
The filter can be switched in  
and out and you can select  
between two different slopes,  
12 dB/ octave or 24 dB/ octave.  
Choose the slope and the set-  
ting that sounds best in your  
car.  
Automatic turn on when using high level input.  
With the Hi/Low input swich set to Hi, the amplifier turns  
onautomaticallyonhighinput.Youdontneedtoconnect  
a separate remote wire from your head unit.  
When using High Level input:  
LPF  
80Hz 200Hz  
50Hz 500Hz  
Set the switch to position ”Hi / Level”  
When using Low level input:  
Off 24 dB  
12dB  
Set the switch to position ”Low / Level”  
If the switch is set to wrong  
position, the amplifier still  
works, but the risk for  
disturbances or distortion  
increases.  
Hi level  
Low level  
5
 
CA12  
RCA Output  
Phase control  
Input  
Output  
The phase control 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 on 0 and turn the control slowly  
clockwise until you experience the bass  
sound coming from the front.  
Use RCA Outputs to  
connect additional  
amplifiers.  
A
B
A
B
Phase  
0o  
180o  
You may have to change the polarity of  
the speaker connection to get the best  
result.  
Speaker and power  
connection  
To Remote on  
head unit  
4 Ω  
The speaker  
terminals are  
-
-
+
+
Fuse  
doubled  
for  
Distribu-  
tion block  
easier connection  
of moreof two or  
4 Ω  
Battery  
Power Cap  
m
o
r
e
subwoofers. The  
+ respective -  
terminasls are  
i n t e r n a l l y  
connected to  
each other. It is  
not possible to  
connect CA12 in  
bridge mode.  
4 Ω  
4 Ω  
-
+
+
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  
NOTE!  
When wiring is complete,  
reconnect the battery  
negative terminal.  
Minimum speaker load is one (1) ohm. You can  
connect up to four 4 ohm subwoofers or two 2 ohm  
subwoofers to the amplifier. Loads or speaker  
impedances less than 1 ohm could result in poor  
sound quality and/or damage to amplifier.  
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.  
The drawing shows how to connect four 4 ohm  
subwoofers to the speaker terminal.  
2.  
Turn up the head units volume slightly. All  
speakers should operate. if not, check  
wiring connections at amplifier and  
speakers.  
6
 
CA12  
Professional Tip:  
Professional Tip:  
SPEAKER POLARITY CHECK.  
NOISE PROBLEMS  
All speakers in a car audio system should be  
connected in phase (the same polarity). All spea-  
ker cones must move in the same direction. Out of  
phase speakers will cause a lack of bass, and a  
poor stereo soundstage.  
WHINING NOISE VARYING WITH ENGINE  
REVOLUTIONS:  
Do this:  
1.  
Rewire the power supply (12 V) to source  
unit direct from battery.  
Rewire ground wire from source unit to  
Checking polarity:  
2.  
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.  
clean position on chassis.  
3.  
Check all power connections to ensure that  
they are clean and tight.  
4.  
5.  
Check quality of system ground connection.  
Install a Power Cap capacitor. This can be  
helpful against most noise problems.  
CONSTANT WHINING NOISE:  
Do this:  
1.  
2.  
3.  
Ensure that all equipment has a common  
ground point.  
Check quality of earth strap connection from  
battery negative terminal to chassis.  
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, re-  
route original cable away from source of  
interference.  
+
+
Battery  
1,5 Volt  
-
If noise remains regardless of cable position,  
try to use so called Quasi-balanced signal  
cables. DLS PRO or ULTIMATE cables are  
quasibalanced.  
-
Professional Tip:  
Professional Tip:  
Installing in trunk  
Securing wires  
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.  
Use wire ties to bundle together when possible.  
(But never bundle speaker wires or signal cables  
together with power wires.  
Professional Tip:  
Professional Tip:  
Crimp connections  
Purchase crimp connectors and crimping tool.  
Connectors are color coded.  
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. Runs speaker and power wires on  
opposite sides of the car.  
1. Strip 1/4 inch (6 mm) of insulation from the wire.  
2. Insert into connector  
3. Crimp tightly  
7
 
DLS Svenska AB  
P.O. Box 13029  
SE-40251 Göteborg, Sweden  
Tel: +46 31 840060  
Fax: +46 31 844021  
 

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