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How to install and

operate the DLS

Reference series

car audio amplifiers

RA25 & RA30.

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……………………………..

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

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

6

Grand Bass..................…………....

6

Phase control.................................

6

Crossovers.....................................

6

RA25 speaker wiring:

Front speakers…...………………....

7

Bridge connection…………………...

7

RA30 speaker wiring:

Two sp subwoofer …….....

8

Testing………………………………..

9

Troubleshooting……………………...

9

Professional tips……………………..

10

Specifications………………………...

11

Summary of Contents for RA25

Page 1: ...ered 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 ...

Page 2: ...ibility 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 Check all locations and placements carefully befo...

Page 3: ...er cable minimum AWG 5 16 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 ring crimp terminals one for connection to the battery plus and one for the amplifier grou...

Page 4: ...n 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 Insert the cable directly into the amplifier terminal If there is no remote voltage available from the ste reo you must ...

Page 5: ...remote wire connected to the REMOTE terminal instead High Low level input switch Hi level auto start switch 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 remo...

Page 6: ...Hz The filter can be switched IN OUT and is available on RA30 sub channel only 6 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...

Page 7: ... one for each channel If you want to use the RA25 for bridge mode connection of a subwoofer you must use an external passive lowpass crossover 7 Speaker wiring RA25 RA25 is a 2 channel stereo amplifier It can be connected either as a stereo amplifier for fullrange speakers or as a mono amplifier for a single driver connected in bridge mode RA25 With the HP filter in OUT position the amplifier allo...

Page 8: ... box with it s functions is activated when the IN OUT switch is set to IN position Connect the cable between the amplifier socket and the socket on the remote box 8 Two fullrange speakers and one subwoofer to RA30 Filter settings channel 3 4 With the 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 o...

Page 9: ...AFTER 10 30 MINU TES The amplifier is overheating due to inadequate venti lation 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 contro...

Page 10: ...attery 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 tr...

Page 11: ... can be switched in out Pre amp configuration onRA30 sub channel Filter lowpass 40 125 Hz Fixed 25 Hz subsonic filter Yes Phase shift 0 180 degrees contiously Yes Grand bass adjustable gain 40 Hz 0 18 dB Remote bass level and phase control Yes can be switched in out Protection current thermal current thermal Max cable size DC input 7 AWG 10 mm2 4 AWG 21 mm2 Max cable size front speakers 7 AWG 10 m...

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 ...

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