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4 - IMPORTANT
4.1 - CONNECTION TO THE INPUT SOCKETS
• Use only loudspeaker cables (unscreened) having suitable
cross section (at least 2 x 1.5 mm
2
) and quality. Do not twist
or sharply bend the cables and do not allow for knots to
be formed, because they may result in insulation damage.
4.2 - PARALLEL CONNECTION OF 2 OR MORE SYSTEMS
IMPORTANT: models WIDE 153P4 and 123P4 (with 4 ohm
rated impedance) are not intended for parallel connection,
to avoid damages to the power amplifier (see following
paragraph). Only in the case that the power amplifier is
rated for 2-ohm operation, it is possible to parallel-connect
two 4-ohm speakers to one amplifier channel, wiring
them directly to the amplifier output connectors, with two
separate cables (one each speaker).
• Connect the IN socket of the second system to the LINK
socket of the second one. Please note that IN and LINK
sockets are wired in parallel, thus both of them may be
used as input or output, indifferently.
• PAY SPECIAL ATTENTION TO THE PARALLEL IMPEDANCE:
if two 8-ohm systems are parallel connected, the resulting
load impedance for the amplifier will be 4 ohm, a value
that is within the allowed range for all power amplifiers
and powered mixers manufactured by Montarbo and
by most other manufacturers. For 3 parallel connected
systems, the resulting total impedance decreases to 2,7
ohm, and for 4 system to 2 ohm.
If the speakers are rated at 4 ohm impedance, then
this 2 ohm limit is reached by simply wiring two of them
in parallel.
Some power amplifiers and powered mixers cannot
operate reliably with these low values of load impedance.
Always check the technical specifications of your amplifier
or powered mixer for the value of the minimum load
impedance.
4.3 - PRODUCT CARE AND MAINTENANCE
To avoid malfunctions and premature degrading of
specifications....
• Never expose the loudspeaker for long periods to direct
sunlight.
• Never expose the loudspeaker to heat sources such as
radiators or other products that produce heat.
• Never expose the loudspeaker to excessive vibrations or
mechanical shocks
• Avoid operating and storing the enclosure in damp or
dusty places: this may lead to malfunctions and premature
degrading of specifications.
• Care should be taken so that objects do not fall and liquid
are not spilled into the enclosure. In public event don’t let
people, musicians, technicians or anyone put glasses, cups,
ashtrays or cigarettes on the enclosure.
• Use a soft brush or a jet of air to clean the enclosure.
Do not use alcohol, solvents or detergents.
• Always leave the protective grille mounted on the
enclosure.
• Take care of your connecting cables.
Make sure that they are not damaged, knotted or twisted.
• Do not force connectors.
• Before performing any connection, make certain that the
power amplifier or the powered mixer are switched off.
user's manual
ENGLISH
