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DLS RA20 How To Install And Operate

Reference series car audio amplifiers
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How to install and
operate the DLS
Reference series
car audio amplifiers
RA20 & RA40.
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 installa-
tion 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.
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 info@dls.se.
Information can also be found on our WEB-site
www.dls.se
Contents
Features...................................
Installation................................
Routing Wires............................
Power and Outputs.....................
Input and controls.......................
Input wiring.....................................
Input level control..........................
Grand Bass..................................
Phase control.................................
Crossovers.....................................
RA20 speaker wiring:
Front speakers............................
Subwoofer.................................
Four speakers............................
Testing......................................
Troubleshooting........................... 9
Professional tips..........................
Specifications.............................. 11
RA20
RA40
2
2
3
3
3
4
5
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6
6
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Summary of Contents for DLS RA20

  • Page 1: Table Of Contents

    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...

  • Page 2: Features

    Important Allow air circulation around the amplifier. DLS logo on amplifier cooling flange The DLS logo on top of the amplifier is attached The DLS Reference series of amplifiers have a with two hex. screws. The logo can be removed...

  • Page 3: Tools And Materials Needed

    RA20 & RA40 Tools and material needed Routing wires 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...

  • Page 4: Wiring

    RA20 & RA40 Wiring Power and Outputs Remote terminal ( REM ) Power terminal ( +12V) For RCA cable signal input: Set the input selector switch to position ”Low level”. Connect the fuse holder as close to the vehicle Connect the radio power antenna lead = remote...

  • Page 5: Input And Controls

    High / Low level input switch To ensure best possible performance from the High Level Input for ch 1 & 2 on RA20 and RA40 amplifiers a switch is installed to select between Connect left and right speaker wires coming from Hi and Low input.

  • Page 6: Input Level Control

    Play a tape or CD, make sure all bass or treble amplifier in full range mode. settings or equalizer are flat, and turn the volume This is the crossover configuration on RA20 & RA40: of the radio up until you just start to hear distortion. RA20: Turn the volume control down just a bit.

  • Page 7: Subwoofer

    RA20 Speaker wiring RA20 One subwoofer connected in mono bridge mode RA20 is a 2-channel stereo amplifier. It can be connected either as a stereo amplifier for fullrange speakers, or as a mono amplifier for subwoofers connected in bridge mode.

  • Page 8: Front Speakers

    RA40 Speaker wiring RA40 Two fullrange speakers and one subwoofer to RA40 is a 4-channel stereo amplifier. It can be RA40 connected either as a stereo amplifier for two pairs of fullrange speakers, or as a 3 channel amplifier with one pair of fullrange speakers in stereo, and one subwoofer connected in mono bridge mode.

  • Page 9: Two Speakers + Bridged Subwoofer. 8 Two Speakers In Bridge Mode

    Filter settings channel 1, 2, 3 & 4 If short circuiting continues, contact your local With the HP-filter in OUT position DLS dealer. A fault may exist in the amplifier. the amplifier allows the speakers 5. To start the amplifier requires a remote voltage of to play fullrange.

  • Page 10: Professional Tips

    RA20 & RA40 Professional Tip: Professional Tip: NOISE PROBLEMS SPEAKER POLARITY CHECK. WHINING NOISE VARYING WITH ENGINE All speakers in a car audio system should be REVOLUTIONS: connected in phase (the same polarity). All spea- ker cones must move in the same direction. Out of...

  • Page 11: Specifications

    RA20 & RA40 Specifications DLS CLASSIC RA20 RA40 Number of channels Working mode Power output at 13,8 Volt, 20 Hz - 20 kHz, max 0,1 % THD RMS power out, 4 ohm 2 x 130 W 4 x 75 W...
  • Page 12 DLS Svenska AB P.O. Box 13029 SE-40251 Göteborg, Sweden Tel: +46 31 840060 Fax: +46 31 844021 E-mail: info@dls.se www.dls.se...

This manual is also suitable for:

Ra40

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