The Pacific Evolution DFS-20 Surround Loudspeaker
Connect the cable to the speaker. The speaker should ideally be sited 600 mm-1.5 metres above the
listening position and 2.5-3.5 metres apart, central to the listener and behind the listening position,
preferably on a rear wall.
Ensure that the wall is sound and can support the product. Drill two 5mm holes in the wall 160mm
apart and horizontally aligned. Fix a suitable No 8 round head screw firmly into each hole using
appropriate wall plugs. Leave a stub of 5mm protruding from the wall. Align the holes in the mounting
brackets over the screw heads and carefully lower the unit onto the screws. The speaker should now be
securely attached with the spacers resting against the wall. Now connect the speakers to the amplifier.
Note: For those unable to wall mount the DFS-20, you should consider using a suitable pair of floor
stands of appropriate height. Consult your dealer for advice.
If the listening position is some distance from a rear wall, the loudspeakers
may be mounted on opposite side walls but always behind the listening position.
channels are reproduced at equal loudness.
Front and Effects Channels
On some programme material the surround channel may seem
lower than the front. Do not readjust this level. You may,
however, need to adjust the subwoofer output level. Avoid
setting too high a level or you will swamp the sound with bass
which be tiring to listen to and may limit the subwoofer’s ability
to respond to large bass transients. You should also set a
sensible level going into the subwoofer from the AV processor.
Delay Settings
Many AV processors feature delay settings. The purpose of delay
is to enable surround and dialogue information to arrive at the
listener’s ears at the same time as the Front channels, even
when the listening seat is in a non-ideal position.
Rear Delay:
If the listening position is equidistant from the
Front and Rear speakers, a low delay setting should be set. The
closer the listener is to the Rear speakers the higher should be
the delay setting used,
Centre Delay:
If the Centre speaker is level with (or slightly
behind) the Front speakers, set the delay to zero. If the Centre
speaker is forward of the Front speakers, increase the delay.
LFE
In the cinema the Low Frequency Effects channel is an extra bass
channel with its own subwoofer and not a regular subwoofer
channel. In domestic systems the LFE channel typically feeds
into the subwoofer. Where no subwoofer is used, the LFE signal
is combined with Front Channel information. When you set the
Setting Loudspeaker Sizes
LFE level at your AV processor, use care as the powerful low
Many digital AV Processors require you to specify the size of
frequencies can overload domestic loudspeakers.
speakers in all channels. These are usually ‘Large’ or ‘Small’.
If you hear popping or thumping noises coming from the front
Always choose 'Small' for the Surround channels and Centre
loudspeakers or subwoofer, immediately turn the AV Processor's
channel whether you are using a subwoofer or not.
volume level down and then back off the LFE level. This should
cure the problem. If it does not, back off the volume level at the
If you are not using a subwoofer:
Set the Front Speakers to
subwoofer (if you are using one) until the problem disappears.
‘Large’. Set the ‘Subwoofer’ option on the processor to 'Off' or
‘No'. The Front channels will now receive all the system bass.
Please read the relevant sections of your AV amplifier manual
and familiarise yourself with the various issues. If you are
If you
are
using a subwoofer
: When set to ‘Small’ all the
unsure, consult your dealer for help.
system bass will go into the subwoofer. If you choose ‘Large’
the Front channel bass will be reproduced from the Front
Phase
speakers. Bookshelf speakers should be set to ‘Small’, large
A Home Theatre system should have a precise front stage, a
floor standing units may be set to ‘Large’.
diffuse rear stage and good localisation of dialogue. If the
Setting Levels
colours on the loudspeaker terminals do not correspond with
those on the amplifier, the sound will appear poorly focussed or
Once the loudspeaker settings have been finalised, put the AV
‘out of phase’. For this reason it is essential that the speakers
amplifier into its “Test” mode (see instructions supplied with
are connected according to the wiring diagrams in this manua
l.
your processor). Adjust the level of each channel in turn until all
The front loudspeakers are placed on either side of the television
screen, 2 to 3 metres apart. The speakers should be angled
slightly so they are aimed towards the listeners.
As the rear surround channels are the ‘effects’ channels the
reproduced sound should be as room filling as possible. We
recommend placing the speakers in a high position, behind the
listener’s head and angled towards the listener. If the rear wall
is more than 1metre behind the listening seat, position the units
on the side walls. If the walls are a long way from the listening
seat, consider stand mounting the loudspeakers.
Most of the dialogue comes from the centre loudspeaker.
Speech should appear to originate from the actors’ mouths.
Operating height is important. Ideally the front and centre
channel speakers should be at the same height . For this reason
the centre channel speaker is best operated on top of the
television monitor. The front faces of the centre and surround
loudspeakers should also be in line as far as possible.
Subwoofer
As the ear is unable to detect the direction from which deep bass
originates, this allows you freedom to position the unit. Varying
the distance from the wall alters the bass. Placing the subwoofer
across a corner boosts the bass but may impair clarity.
The performance of Home Theatre systems can often be
enhanced by using a pair of subwoofers.
