VARIANT 18A
Mezclador/
Mixer
Retardo/
Delay
Procesador/
processor
138Hz
VARIANT 25A
3.6 OVERLOAD (LIMIT) INDICATORS
3.5 SWITCH ON-OFF
3.7 OVERHEATING
3.9 LOW MAINS VOLTAGE
3.8 EQUALIZATION
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.
3.10 CONNECTIONS
Manual del usuario/
User´s manual
31
Variant series
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
delay if
requeired and feeding the VARIANT 18A with the full
range signal.
time
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.
It is recommended that the red
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.
LIMIT
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.
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.
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
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.
LOOP THRU
