Operation Manual

ManualsBrandsDLS ManualsAudioRA 50

How to install and

operate the DLS

Reference series

5-channel amplifier

RA50

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.



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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

This manual is modified 2005-04-06 for RA50 with

separate sub channel input.

Contents

Features…………………………….. 2

Installation…………………….……. 2

Tools and materials needed………. 3

Amplifier installation kit………….... 3

Routing Wires…………………….... 3

Wiring:

Power connection..……………..…. 4

Input and controls………………..... 5

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

Hi Level Auto start switch............... 6

Input level control.......................... 6

Grand Bass..................………….... 6

Phase control................................. 6

Crossovers (filters)......................... 7-8

RA50 speaker wiring:

Four speakers + subwoofer ……..... 9

Two speakers in bridge mode +

subwoofer.......................................... 10

2-way component set with active

crossover + subwoofer...................... 11

3-way component set with active

crossover to midbass + subwoofer... 12

Testing……………………………….. 13

Troubleshooting……………………... 13

Professional tips…………………….. 14

Specifications………………………... 15

Summary of content (16 pages)

PAGE 1
Contents How to install and operate the DLS Reference series 5-channel amplifier RA50 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.
PAGE 2
RA50 The amplifiers include RCA inputs High Level input Variable low pass crossover Variable high pass crossover Grand bass feature 0 - +18 dB Phase shift continously variabel 0-180 degr. Remote turn on / off Automatic remote turn on/ off on high level input without connecting any remote wire Electronic protection circuitry against short-circuit, DC offset and thermal overload.
PAGE 3
RA50 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 Routing wires Stereo head unit 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 t
PAGE 4
RA50 Wiring Power connections Power terminal ( +12V) Connect the fuse holder as close to the vehicle battery + as possible, using AWG 4 = 21 mm2 or heavier cable. Use ring crimp terminal cable to connect to battery +. Apply silicon grease to the fuse to prevent corrosion. Use an 80 A fuse for cable 4AWG (21 mm2). DLS Connect with ring terminal to battery + terminal DLS FH1 or FH2B fuse holder Connect the battery cable from the fuse holder to the +12 Volt terminal on the amplifier.
PAGE 5
Input and controls RA50 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. 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.
PAGE 6
RA50 Phase control Hi level Auto start switch To ensure best possible performance from the amplifiers when used with high level input a switch is installed to select between Automatic amplifier start and remote wire start. The switch is located between the fuses and the speaker terminal.
PAGE 7
RA50 Crossovers Filters on CH 1 and CH2 The DLS RA50 amplifier include high pass filter (HP), low pass filter (LP) and subsonic filter. The slope of all filters are 12 dB / octave (subsonic 18 dB). The filters can be switched off if you want to run the amplifier in full range mode. Some of the filters can be used on different frequency ranges by the use of multiplication switches. The filter configuration on the respective channels can be found in the technical specifications.
PAGE 8
RA50 Filters on CH 3 and CH4 CH3 and CH4 include high pass filter (HP). The slope of the filter is 12 dB / octave. The filter can be switched off if you want to run the amplifier in full range mode. The HP-filter can be used in three different frequency ranges by changing a switch in the bottom plate of the amplifer.
PAGE 9
RA50 Speaker wiring RA50 This is a 5-channel stereo amplifier. It can be connected in various modes described on the following pages. Example 1. Four fullrange speakers connected in stereo mode to front and rear channels, CH1 - CH4 + - - + One subwoofer to CH5 + - Front speaker pair + - - + NOTE! The subwoofer output is 2 ohm stable. Two 4 ohm subwoofers can be connected in parallel.
PAGE 10
RA50 Speaker wiring RA50 Example 2. Two fullrange speakers connected in stereo bridge mode to front and rear channels, CH12 & 3-4. One subwoofer to CH5 + - - + + NOTE! The subwoofer output is 2 ohm stable. Two 4 ohm subwoofers can be connected in parallel. Front speaker pair connected in bridge mode Filter settings CH1 - CH2 HP-filter: in OUT position the amplifier allows the speakers to play fullrange. If you for some reason want to limit the low bass reproduction switch IN the HP-filter.
PAGE 11
RA50 Speaker wiring RA50 Example 3 One 2-way component set connected with active crossover. The amplifiers internal filters are used. One subwoofer to CH5 + - - + Woofers + + - - + Tweeters Filter settings CH1 - CH2 - NOTE! The subwoofer output is 2 ohm stable. Two 4 ohm subwoofers can be connected in parallel. Filter settings CH5 HP-filter: in OUT position the amplifier allows the speakers to play fullrange.
PAGE 12
RA50 Speaker wiring RA50 Example 4. A 3-way component set. The midbass connected to CH 1-2 with active crossover. The midrange and tweeters connected to CH3-4 with passive crossover. + - - + One subwoofer to CH5 Mid bass + + Filter box + Filter box + + - - + + - - Midrange Tweeter Filter settings CH1 - CH2 HP-filter: in OUT position the amplifier allows the speakers to play fullrange. If you for some reason want to limit the low bass reproduction switch IN the HP-filter.
PAGE 13
RA50 Testing Troubleshooting Before you finish the installation, you should do the following tests to make sure the wiring is correct and everything is operating properly. If problems occour during the installation, or later, this guide might help you to find out whats´s wrong. Reconnect Battery When wiring is complete, reconnect the battery negative terminal. Test power wiring 1. 2. Turn on the head unit but do not turn up the volume. The amplifier power light should come on.
PAGE 14
RA50 Professional Tip: Professional Tip: NOISE PROBLEMS SPEAKER POLARITY CHECK. WHINING NOISE VARYING WITH ENGINE REVOLUTIONS: 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. 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.
PAGE 15
RA50 Specifications DLS REFERENCE RA50 Number of channels 5 Working mode AB Power output at 13,8 Volt, 20 Hz - 20 kHz, max 0,1 % THD, all channels driven.
PAGE 16
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.