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The 

LP-filter

  will allow low frequencies only and

blocks higher frequencies. A typical setting is 70 –
90 Hz. When used with a subwoofer the switch
should be in IN-position. Set the LP-filter to 70-90
Hz.

GRAND BASS

 is used to increase the bass

volume with a center frequency of 40 HZ. You can
select the amplification between 0 dB ( no
amplification ) and +18 dB (full amplification).

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 that the bass sound
is coming from the front. If you dont get the result
you want, also try to phase reverse the subwoofer
connections and make a new adjustment.

Remote Bass level and phase control.

With the remote control unit it is possible to adjust
the bass level and phase on the subwoofer
channels 3&4, from the front seat. The 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 on the HP-filter. The typical
setting is then around 60 – 80 Hz.

Speaker wiring RA30

RA30 is a 3-channel stereo amplifier. It is normally
used to connect one pair of front/rear fullrange
speakers, and one or more subwoofers connected
to the mono sub channel.

       RA30

Filter settings channel 1 & 2 (front system)

    Rear or front speakers         Rear subwoofer

-

+

RA30 is two ohm stable, so it is possible to connect
two front speaker systems, or two subwoofers, in
parallel.

Remote Bass lvel and phase control box

The RA30 includes a
remote control unit. With
this unit it is possible to
adjust the bass level and
phase on the subwoofer
channels 3&4, from the
front seat. Connect the
cable between the
amplifier socket and the
socket on the remote box.

Содержание Performance series

Страница 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 ...

Страница 2: ...t the negative terminal of the battery The DLS Reference 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 mm...

Страница 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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