Maintenance And Cleaning - Sonus Faber Maxima amator Bedienungsanleitung

3.4.1 Standard connection (single wiring)
It consists in running the loudspeakers (usually a pair) with a single stereo amplifier, or with a pair of
monophonic amplifiers, using only one bipolar power cable for each channel. Complete the connection as
shown in the relative illustration.
3.4.2 Bi-wiring connection
(only for loudspeakers equipped with separate inputs for low and medium-high frequencies).
This scheme allows the bipolar power cables, to be connected to the Low sections and the Medium-
high sections of the loudspeakers, to be differentiated. It consists in running the loudspeakers (usually a
pair) with a single stereo amplifier, or with a pair of monophonic amplifiers, using separate bipolar power
cables for each input section of the loudspeaker. Remove the jumpers and complete the connection as
shown in the relative illustration.
3.4.3 Bi-amping connection
(only for loudspeakers equipped with separate inputs for low and medium-high frequencies).
This scheme is an evolution of the Bi-wiring connection and also allows the amplifiers to be connected to
the Low sections and the Medium-high sections of the loudspeakers to be differentiated. Loudspeakers
(usually a pair) are run with two distinct stereo amplifiers, or with two pairs of monophonic amplifiers,
using separate bipolar power cables for each input section of the loudspeaker. Remove the jumpers and
complete the connection as shown in the relative illustration.
3.4.4 Tri-wiring connection
(only for loudspeakers equipped with separate inputs for infra-low and medium-high frequencies).
This connection scheme is an extension of the Bi-wiring scheme for loudspeakers with three separable
input sections. It consists in running the loudspeakers (usually a pair) with a single stereo amplifier, or
with a pair of monophonic amplifiers, using separate bipolar power cables for each input section of the
loudspeaker. Remove the jumpers and complete the connection as shown in the relative illustration. By
keeping the jumpers between two pairs of input terminals (normally medium-low and medium-high), it is
however possible to implement a bi-wiring scheme).
3.4.5 Tri-amping connection
(only for loudspeakers equipped with separate inputs for infra-low, medium-low and medium-high
frequencies).
This connection scheme is an extension of the Bi-amping scheme for loudspeakers with three separable
input sections. Loudspeakers (usually a pair) are run with three distinct stereo amplifiers, or with three pairs
of monophonic amplifiers, using separate bipolar power cables for each input section of the loudspeaker.
Remove the jumpers and complete the connection as shown in the relative illustration. By keeping the
jumpers between two pairs of input terminals (normally medium-low and medium-high), it is however
possible to implement a bi-amping scheme).
3.4.6 Multi-channel audio systems
The above also applies similarly in the case of multi-channel systems. Obviously, the connection scheme
becomes quite complex as the number of amplifiers increases with the number of channels.
3.4.7 Audio controls
Top range loudspeakers give the user the possibility to adjust the acoustic output at low and/or high
frequencies. The extent of the recommended adjustment depends on the taste of the listener and on
the specific peculiarities of the environment, i.e. the absorption of the room and the diffusion of the low
frequency sound components.
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With the audio controls in certain positions, the overall impedance of the
loudspeaker may decrease at certain frequencies. It is therefore always
recommended to use high quality cables (low resistance and low reactance per
linear metre) and power amplifiers with high output current.
3.4.8 Recommendations for choosing the audio amplifier
The output power required by amplifier in average conditions depends on the features of the loudspeaker
system (nominal impedance and sensitivity) and listening conditions (average acoustic level and listening
point). The following table, as an example, shows the case of a loudspeaker with a 4-ohm nominal
impedance and a sensitivity of 92 dB SPL.
Required amplifier required
Listening distance output power (min. Pavg per
channel*)
2 m 40 W
2.5 m 63 W
3 m 90 W
3.5 m 125 W
* for an average volume level at a listening distance equal to 82 dBSPL, music signal with 20 dB crest
factor
Sound programs with higher crest factors require power amplifiers with a higher headroom of output
voltage, while the average power of the audio signal normally remains fairly low. The choice of amplifiers
should therefore be made taking into account not so much the value of the average power supplied for low
listening levels but, above all, the management of those very short moments in which the musical signal
reaches extraordinarily high peaks.

4. MAINTENANCE AND CLEANING

The loudspeakers do not require any particular maintenance operations, just general periodic cleaning.
In order to preserve the loudspeakers' finish, cover them with the supplied fabric dust-protection sheet,
especially if the loudspeakers are not expected to be used for an extended period of time.
Risk of damage to the loudspeaker's cabinet!
Do not use cleaning products, furniture wax, liquid detergents, or alcohol.
Do not use rough cloths.
Do not use products like waxes or detergents to clean the wood parts, as these could stain or damage
the wood or the loudspeakers themselves. It is recommended to use a soft cloth (e.g. microfiber, like that
supplied), and moisten it slightly with the liquid supplied in the cleaning kit, if necessary. Wood is a natural
living material that can be affected by the environmental conditions. We recommend positioning the
loudspeakers away from heat sources or windows, above all during the summer months. Avoid exposing
the loudspeakers to direct sunlight.
It is recommended to use a soft brush to eliminate any dust that may have accumulated on the cabinet,
the front panels, and the loudspeakers themselves, taking care not to damage the loudspeakers' delicate
membranes.
It is recommended to use a cloth dampened in water or common liquid neutral detergents with low alkaline
content to clean the marble parts of the base of the speaker and the base of the stand (where present).
It is recommended to use the supplied cloth and liquid to clean the metal and glass surfaces (where
present). Do not use aggressive strong chemical products such as acetone, trichloroethylene, acids,
abrasive agents, strong de-greasers, alcohol, lemon or wine.
Other specific suggestions and instructions are provided in Section 6 (Illustrations).
These measures will help you to keep your loudspeakers' working perfectly for years to come. Time will
help improve the sound by breaking in the speakers' moving parts (membranes and suspensions), and
the acoustic chamber will become accustomed to music being played the more it is used - much like what
happens with acoustic string instruments!
Corresponding audio signal stren-
gth (per channel *)
0.8 W
1.3 W
1.8 W
2.3 W
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