Dls CA20, CA21, CA40, CA50 User Manual
How to install and operate the DLS CA20,
the CA21, CA40 and the CA50 amplifiers.
Contents
Features…………………………….. 2
Installation…………………….……. 2
Tools and materials needed………. 3
Amplifier installation kit………….... 3
Routing Wires…………………….... 3
Wiring
Power and Outputs……………..…. 4
Inputs and controls………………... 5
Input level control 6
Grand Bass,Crossovers………….... 6
CA40 Crossovers………………...… 7
CA20 and CA21 speaker
wiring:
Front speakers…...……………….... 8
Subwoofer…………………………... 8
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 amplifiers 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.
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.
!!
!
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Technical Assistance
CA40 speaker wiring:
Four speakers…………………….... 9
Two speakers + bridged subwoofer. 9
Two way front system with
active crossovers……………………. 10
Two subwoofers…………………….. 10
CA50 speaker wiring:
Four speakers…………………….... 11
Subwoofer...................................... 11
Testing……………………………….. 12
Trouble-shooting…………………….. 12
Professional tips…………………….. 13
Specifications………………………... 14
For technical assistance ask the shop where the
product was sold or the distributor in your very country.
You can always phone the DLS Helpdesk in Sweden
+ 46 31 84 00 60 or send an e-mail to info@dls.se.
Information can also be found on our WEB-site
www.dls.se
CA20, 21, 40 & 50
All models include
# RCA inputs CA20
# High Level input 2 x 50 Watt RMS / 2 x 100 Watt peak
# Continuos variable low pass and/or high pass 1x 170 Watt RMS / 1 x 300 Watt peak
crossover CA21
# Bass boost feature (not on CA50) 2 x 100 Watt RMS / 2 x 200 Watt peak
# Remote turn on / off 1 x 350 Watt RMS / 1 x 600 Watt peak
# Automatic remote turn on/ off on high level CA40
input without connecting any remote wire 4 x 50 Watt RMS / 4 x 100 Watt peak
# Electronic protection circuitry against 2 x 170 Watt RMS / 2 x 300 Watt peak
short-circuit, DC offset and thermal overload. CA50
Bridgeable design to direct full power to 4 x 50 Watt RMS / 4 x 100 Watt peak
one or two subwoofers etc. 2 x 150 Watt RMS / 2 x 200 Watt peak
1 x 150 Watt RMS on Sub channel
All above output power ratings in
four ohms stereo,respectively bridged
at 13,8 Volt ,max 0,1 resp. 0,2 % THD
Installation
Before you begin installation
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 Classic series of amplifiers have a
compact design that allows great flexibility in
mounting. You can mount it under a seat or 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 in an inverted or upside
down position.
Disconnect Battery
Before starting the installation, always disconnect
the negative terminal of
the battery.
Check all locations and placements carefully before
making any cuts, drilling any holes or making any
connections.
2
CA20, 21, 40 & 50
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
##
# ½ inch thick plywood or particle board for
the amplifier to be mounted upon.
Routing wires
Stereo
head unit
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 8 = 10 mm2 or heavier
# 1 pc of fuseholder to install close to the
car battery + fuse 50 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
# Two min. 8 gauge ring crimp terminals –one
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
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.
# Wire ties
# Insulating grommet or insulating tube
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.
If possible buy AWG 4 = PL 21 mm2 cable for best
performance.
3
CA20, 21, 40 & 50
Wiring
Power and Outputs
Power terminal ( +12V)
Connect the fuse holder as close to the vehicle
battery + as possible, using AWG 8 = 10 mm2 or
heavier cable. Use ring crimp terminal cable to
connect to battery +. Apply silicon grease to the
fuse to prevent corrosion
+12V REM GND
DLS
DLS FH1
fuse holder
Connect the battery cable by a crimp fork terminal
( spade ) to the +12 Volt on the amplifier. If you use
a AWG 8 = 10 mm2 or thinner cable, you can do
without the crimp terminal and put the cable right
into the connector.
Be sure to use a rubber grommet or a plastic
insulating tube where the cable passes the firewall
or other places when it can easily be jammed.
Use ty-wraps to secure to existing cables in the
engine compartment.
Remote terminal ( REM )
For RCA cable signal input:
Connect the radio power antenna lead = remote
turn on/off from the car stereo to the amplifier
remote connection. This turns on the amplifier
whenever the car stereo is turned on.
You can either use the built in remote cable in the
RCA cable itself or use a separate cable as seen
on page 4.
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.
For High Level input:
We recommend you to connect the remote wire as
described above. The amplifier will produce soft
on / soft off operation this way. You must set the Hi
level/Low level switch to Low level position in this
case.
In the case that there is no remote voltage available
from the car stereo or you want to simplify the installation, the amplifier can 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 off operation but some plop sound
when switching off.
+12V REM GND
Ground Terminal ( GND )
Connect to a good chasis 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.
+12V REM GND
4
Fuses
Use only one or two 25 ampere ATC blade type
fuses. CA 50 uses three 30 ampere fuses.
Input and controls
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.
CA20, 21, 40 & 50
CA40
The CA40 four channel amplifier is connected
likewise, however we have four channels.
You can feed two channels from RCA and two
channels using high level input from rear speaker
cables.
Important
On CA20/21 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 input socket A & B. CA40 and CA50 is also
equipped with separate inputs for channel C & D.
CA 50 has also a separate input for channel E.
High Level Input
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.
CA 20 & CA21
High Input
Hi level input
plug on amp.
White: A ch.+
White/Black: A ch.-
Gray/Black: B ch.Gray: C ch.+
High Input
(A/B Ch)
Hi level input
plug on amp for CH A & B.
High Input
(C/D Ch)
Hi level input plug on amp for CH C & D.
CA50 uses this plug for CH A, B, C & D.
Violet: C ch.+
Violet/Black: C ch.Green/Black: D ch.Green: D ch.+
White: A ch.+
White/Black: A ch.-
Gray/Black: B ch.Gray: C ch.+
CA50
The CA50 five channel amplifier is connected
likewise, however only Channels A, B, C and D can
be fed with high input. The signal is then connected
internally to channel E.
Parallel input on CA40 & CA50
In PCD position the A/B and C/D
Parallel Input
Off PCD
input connectors are internally
connected in parallel.
In OFF-position you must use
dual signal cables.
On CA50 the PCDE position
connects the CD input with the
input for channel E.
Automatic turn on when using high level input.
With the Hi/Low input swich set to Hi, the amplifier
turns on automatically on high input. You dont need
to connect a separate remote wire from your head
unit.
RCA Output
Input Output
Use RCA Outputs to
AA
BB
connect additional
amplifiers (not available on
CA50).
5
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