Focal CHORA 806 Manual De Uso página 8

CHORA
™
U s e r m a n u a l
Connections (fig.E)
Chora connectors provide reliable, multi-purpose contacts for stripped cables (up to 4mm diameter), fork
terminals or banana connectors. It is imperative to respect the connector polarity of both the loudspeaker
and the amplifier. The connector marked "+" must be connected to the positive output on the amplifier and
the connector marked "-" must be connected to the negative terminal . Stereo image and bass perception
would be seriously compromised if these conditions are not respected. Choose good quality cables with a
cross-section appropriate to their length: your retailer will be able to advise you.
Positioning (fig. F, G, H)
These loudspeakers have been designed to deliver the most faithful reproduction of all kinds of music or
home cinema programmes. Nonetheless, we recommend following these simple rules to optimise their
performance and to warranty good tonal balance and a realistic sound image.
The loudspeakers should be positioned symmetrically, facing the listening area, ideally forming
an equilateral triangle with it. However, these distances may be adjusted to find the ideal compromise
according to the design of your interior (fig. F).
The loudspeakers should be positioned at the same height, in the same horizontal plane. Ideally, the
tweeter should be positioned at the same height as the listener's ears in the usual listening position (fig. G).
Do not position your loudspeakers too close to a corner of the room and do not place them too close
to a wall. This will induce some unwanted room resonance and artificially increase bass response. On the
other hand, if the bass level is considered to be insufficient, you could try moving the loudspeakers nearer
a wall to re-balance the bass level (fig. H).
Optimisation (fig. I)
For perfectionists, here is a formula for optimal positioning:
If A is the distance from the centre of the woofer to the nearest floor or wall, B is the distance to the next
closest floor or wall, and C is the greatest distance (A < B < C), the equation B
loudspeaker position.
• Example:
If the centre of the woofer is 20" (50cm) away from the rear wall (A) and 24" (60cm) above the floor (B),
then the side wall will be ideally 28" (72cm) away [C = B
Recommendations for use
The behaviour of the loudspeakers depends on the acoustics of the listening room, on the correct positioning
of the loudspeakers within the room, and on the position of the listener.
It is possible to tweak each of these parameters to obtain or improve a desired effect.
Stereo perception is imprecise and poorly centred: try moving the loudspeakers closer together and/or
have them facing the listening point:
The sound is harsh, aggressive: the acoustics of your listening room are probably too reverberant. Consider
using sound-absorbing materials (carpets, upholstered furniture, tapestries, curtains, etc.) and sound-
reflecting materials (furniture) to absorb or diffuse resonance.
The sound is "flat", strangled: there are too many sound-absorbing materials in the room, the sound is
soaked up, it has no relief. Look for the best compromise between sound-absorbing and sound-reflecting
materials in your room.
In general, aim to have a reflective wall behind the loudspeakers for the sound to develop correctly. The wall
behind the listening area, on the other hand, should ideally be sound-absorbing to avoid rear reflections
"contaminating" the stereo image.
Furniture can be judiciously placed near the side walls of the room to diffuse sound waves and ensure
certain frequency ranges are not excited, particularly in the midrange (suppression of flutter echoes).
2 = AC defines the ideal
2 ⁄ A = 28" (72cm)].
CHORA
™
U s e r m a n u a l
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Break-in period
The speaker drivers used in Chora loudspeakers are complex mechanical components which require a
certain time to adapt to operate at their best and to become acclimatised to the temperature and humidity
of the listening environment. This break-in period varies depending on the climate and may last a few
weeks. To reduce the break-in period, we recommend operating the loudspeakers for approximately
twenty consecutive hours. Once the loudspeakers' characteristics have totally stabilised, you will be able
to enjoy your Chora loudspeakers' performance to the full.
Special precautions
The only maintenance required for the Chora loudspeakers is dusting with a dry cloth. If your
loudspeaker becomes dirty, we recommend simply cleaning it with a damp cloth.
Never use solvents, detergents, alcohol-based or corrosive products, scrapers or scourers to
clean the surface of a loudspeaker.
Keep the loudspeakers away from sources of heat.
Choosing the right amplifier
It is not an excess of amplifier power that can damage your loudspeakers and speaker drivers but a lack of
power. Moreover, if the volume is turned up too high, the amplifier saturates and generates parasite signals
that may damage the tweeter. The dynamic capacity and definition of Chora loudspeakers are sufficient to
reveal the strengths and weaknesses of whatever amplifier is connected. Your retailer will be able to help
you choose the amplifier best suited to your tastes and budget.
Conditions of warranty
All Focal loudspeakers are covered by warranty drawn up by the official Focal distributor in your country.
Your distributor can provide all details concerning the conditions of warranty. Warranty cover extends at
least to that granted by the legal warranty in force in the country where the original purchase invoice was
issued.
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