Sonus Faber Lilium, Руководство пользователя

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ENGLISH
INSTALLATION
ADVICE:
AMPLIFICATION
AND POSITIONING
OF LILIUM IN A ROOM
OPTIMIZATION
OF THE ULTRA-LOW
FREQUENCIES
Many questions may arise regarding the correct
interfacing of Lilium. To dispel any doubts, we feel the
need to specify what follows. A project of this kind
cannot be designed to operate optimally with one single
type of amplification only.
The only thing we can confirm is that a state-of-the-
art loudspeaker system requires an amplification
system that is just as state-of-the-art, no matter what
technology is used.
It is self-evident that if a loudspeaker system of a
considerable size, like Lilium, is installed in a rather
large room, this requires a type of amplification that
guarantees a large reserve of undistorted power.
Regarding the position of the loudspeakers in a room,
some general advice can prove useful to obtain the
maximum performance possible:
1. The choice of the listening room and the speaker
position influence the performance of the whole
system. A room with an irregular shape is
preferable; this type of room improves the response
in the environment because it limits the formation of
standing waves;
2. Rugs and curtains (without exaggerating) positively
influence the acoustic response, because they
contribute to the absorption of reflections and
standing waves that are created in the listening
room;
3. There are no hard and fast rules for every
environment. A good approach to the issue of
positioning Lilium in a room, however, is to virtually
divide the listening room into three equal parts, as
shown by the broken lines in figure 17. At this point,
position the speakers on the first of these broken
lines and well away from the side walls. The listening
position should be placed on the second broken line,
as shown in figure 17. In this manner a good amount
of air is guaranteed all around the subjects involved
in the stereo reproduction, because the speakers can
work freely while the listener is not struck by the
acoustic reflections that generate near the walls and
the corners of the room. Figure 18 shows how the
speakers should be angled to converge towards the
listening point, thus creating the classic ‘isosceles
triangle’ configuration. This final adjustment,
consisting of angling the speakers literally towards
the ears of the listener, greatly improves the focus of
the stereophonic image.
We are aware that many of our customers will not be
able to create these quasi-ideal listening conditions
because of objective problems connected with the
organization of spaces and furniture in their house.
Therefore we advise positioning the two Lilium speakers
apart by a distance not shorter than 200 cm, and to keep
the same distance also between each individual Lilium
speaker and the listening position.
During the very first listening occasions you might
need to change the distance between the speakers and
between each speaker and the listening position. It is
paramount to guarantee a height of 1.1 m to the ear
of the listener, considering a person seated in his/her
preferred position.
Remember that the level of the extremely low range of
the sound spectrum can be optimized using the control
knob located at the back of the speaker cabinet, and
assigned to the lowest frequencies (figure 19); this knob
offers three alternative positions.
The knob setting depends typically upon the listener’s
taste and upon the specific characteristics of the
environment, i.e. its absorption capacity and the even
diffusion of the lowest sound components.