Fbt Archon Serie Mode D'emploi page 57

ARCHON
ARCHON 110 / 112 / 115 loudspeakers are equipped with a crossover operating mode selector ( X-OVER MODE SELECTOR ). The
crossover models are either FULL-RANGE or BI-AMP.
In FULL-RANGE mode the loudspeaker is driven by a single amplifier and the internal crossover splits the audio frequency spectrum into
two bands, feeding lower frequencies to the woofer and higher frequencies to the HF unit.
Using BI-AMP mode makes it possible to obtain the maximum performance from the drivers by using two amplifiers, one for the woofer and
one for the HF unit. In this case the internal crossover is inhibited so that all filtration and, if necessary, equalisation of the drivers must be
performed externally.
WARNING: the drivers are not protected in this mode so, to avoid the risk of damaging the drivers, it is essential to comply with the
prescription concerning maximum power, cut-off frequencies and the slopes of the external electronic filter.
To obtain the maximum performance in BI-AMP mode we recommend using a speaker system digital processor with appropriate settings for
the crossover, limiter, equalizer and delay to achieve temporal alignment between woofer and HF unit.
* 2 hours, pink noise with crest factor 2,
applied RMS voltage corresponding to
the power on the minimum of the
module of the impedance of the speaker
in full range mode, or of the driver in bi-
amp mode.
The table shows the power outputs, measured in accordance with the AES standard, that are acceptable by the loudspeaker in FULL-
RANGE mode or by the individual drivers in BI-AMP mode.
All the drivers are tested with a crest factor of 2; to obtain this value, equalling a 6dB dynamics between average and peak value, an amplifier
with twice the RMS power indicated in the table shall be used. The amplifier recommended by FBT permits obtaining at least a 6dB dynamics
in high SPL applications to keep a high sound quality.
WARNING: the recommended amplifier makes it possible to exploit the full dynamic potential of the loudspeakers to obtain the maximum
sound quality and SPL, but it does not guarantee the protection of the speakers in any condition of use; in the case of a highly
compressed music program or if the amplifier is driven to clipping levels the drivers may be damaged due to overheating or excessive cone
excursion.
For music programs with reduced dynamics and pronounced distortion it is advisable to use an amplifier with an RMS output that is equal to
or lower than the value given in the table to avoid exceeding the heat dissipation capacity of the drivers. In any event, driving the amplifier in
clipping mode results in a substantial rise in the power supplied to the HF unit, which may therefore be damaged despite tripping of the
protection in the internal crossover in FULL-RANGE mode.
OPERATING MODE SELECTOR
A
FULL-RANGE
(PASSIVE)
B
110 / 112 / 115
BI-AMP
C
1) Remove the eight fixing screws (A) from the connection panel.
2) Move the connector (B) to the position of the desired mode
3) Push the connector deep down to guarantee safe securing
4) Mount the connection panel back again
5) Check speaker proper configuration through the opening (C)
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CONNECTIONS