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Dali HELICON Manual

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The Influence of the Listening Room
Every room has it own acoustics that affect the way we hear sound from loud-
speakers. It is a question of how the room receives acoustic energy and releases it
again. You can improve the acoustics of your listening room in different ways.
Part of the sound that you hear does not come directly from the loudspeaker.
Instead, it is reflected from the floor, ceiling and walls. Reflections can be reduced
by furniture, plants and carpets. If the sound is overly bright, soft, absorbent
objects like curtains and carpets can help.
Both the quantity and quality of deep bass depend on the size and shape of the
room and the placement of the loudspeakers in it. For instance, bass can be
boosted by placement near a sidewall and even more by placement in a corner.
Corner placement provides substantial added reflections.
As a general guideline, avoid large, hard, reflective surfaces in the immediate
vicinity of the loudspeakers.
Placement in the Listening Room
DALI Helicon IW 200 Phantom incorporates Wide
Dispersion technology.
Wide Dispersion means that the area in front
of the loudspeakers where a full three-dimen-
sional sonic image is achieved is a great deal
wider than with other loudspeakers. This ensures
substantially better sound across a larger area
within your listening room, when compared to
loudspeakers without Wide Dispersion charac-
teristics.
In a stereo system, the speakers should ideally be
placed the same distance from each other as the
distance from each speaker to a central listen-
ing position. The ideal mounting height for DALI
Helicon IW 200 Phantom is at the listener’s ear
level when seated at the listening position, i.e.
typically 40” - 50” above the floor.
For surround systems, the same guidelines as for
stereo apply with the following additions:
The center speaker should be placed exactly in
the middle between the left/right front speakers.
The rear speakers should be placed in same
height as the front speakers. It is possible to
place the speakers higher because of the good
sound dispersion from the speakers.
X X
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