7
variant 18A
Mezclador/Mixer
Retardo/
Delay
Procesador/
processor
138Hz
variant 25A
Overload (Limit) indicators
Switch ON/OFF
Overheating
Low mains voltage
Equalization
Connections
The LOOP THRU connector is an output XLR
in parallel with the input connector and is useful for
daisy chaining the input signal to a number of
boxes, connecting them in parallel.
The number of units that can be linked this
way depends on the output impedance of the
equipment driving the enclosure, such as the mixer
or processor. Typically, to avoid signal degradation,
the maximum number that can be daisy chained is
given by the formula Zc>10Zs, where Zc is the
load impedance and Zs is the output impedance
of the equipment driving the enclosure (mixer,
console, etc). For instance, a mixing console with
100 ohm output impedance allows daisy chaining
20 boxes, when the input impedance of the
cabinets is 20 kohms.
The
variant 25A
unit can be used alone for
speech applications where low SPL is suitable. To
use it in this mode simply plug the mixer into the
input signal connector. To use it in combination
with the
variant 18A
unit, plug the mixer into
variant
18A
(INPUT) and connect the SATELLITE OUTPUT
to the signal input on the
variant 25A
unit.
When the
variant 25A
and
variant 18A
units
cannot be on the same cluster it is recommended
to drive each model separately from a signal
processor using a 138 Hz High Pass Filter for the
variant 25A
, adding the necessary time delay if
requeired and feeding the
variant 18A
with the full
range signal.
If mains voltage falls below the shutdown
voltage for the unit, it will stop playing. When
acceptable levels are regained, the unit will switch
back on automatically.
The units do not need extreme EQ. Avoid high
levels of gain on the equalizers. Gain values above
+6 dB on a console's EQ are not recommended.
The
variant series
amplifiers generate very little
residual heat and therefore do not need a fan for
cooling. In normal use, the amplifier panel will be
warm to the touch.
If the unit stops playing (or just the mid-high or
the bass sections), the amplifier's overheating
protection may be activated to protect the
components from thermal damage.
Overheating may be due to insufficient cooling,
or to very aggressive use in extremely hot
conditions. Do not use the unit in proximity to high
power lights.
Once the amplifier cools down, it switches
back on automatically. If the unit should shut down
again, try reducing the volume a notch to avoid
overheating.
It is recommended that the red LIMIT LED
indicators are not lit continuously; at most it should
blink only occasionally.
If you wish to have a visual indication at the
mix position of whether the LIMIT LEDs are
lighting, during equipment set-up, closely observe
what mixer VUmeter level corresponds to the level
that lights the enclosure's LIMIT LEDs. That level
that should not be exceeded during the event.
A sound system should be switched on
sequentially. Switch on the self-powered unit last in
your sound system. Switch on the sound sources
such as CD players or turntables, then the mixer,
then the processors, and finally the self-powered
unit. If you have several units, it is recommended
that you switch them on sequentially one at a time.
Follow the inverse order when switching off,
turning self-powered units off before any other
element in the sound system.
Mute all signal sources before switching the
unit on or off.
Manual del Usuario
/ variant /
User’s Manual
