Speaker connection
Connect speakers at one or two output
Speakon connectors. See the rear panel
instructions.
Speakon connectors offer quick connection for
portable applications. To enable a Speakon
connection, plug the male connector into the
outlet and rotate it clockwise. It will then lock into
place and be ready for use.
Racking
All amplifiers are 19-inch rack mount width and
are 2U DIN in height.
Four front-panel mounting holes are provided
for use with M5 or M6 or 1/4” screws. To avoid
bending the chassis in rack mounting applications
where the rack will be transported, mount the
amplifiers to the back of the rack using the rear
mounting holes. Alternatively, place the bottom
amplifier against the base of the rack and pile the
amplifiers with no clearance in between.
A fan cools the aluminum heat sinks from front
to back.
Fan cooling permits airflow through the most
vital parts of the amplifier.
When mounting the unit onto a 19-inch rack, a
rack cooling system is not required, since the air is
exhausted out through the front grille.
However, the rack must not be sealed, and it
should at least have a large enough ventilation
grille to allow air into the rack.
Input connection
A balanced connection is recommended with
XLR connectors, but an unbalanced connection
can also be used.
Mains connection
Should check whether the selected voltage is
correct or not. If the voltage is wrong, it could
damage the amplifier.
The230 V AC version has a nominal voltage
plus minus 10%, i.e., the amplifier can operate
from 207 V to 253 V AC.
Similarly, the 115 V AC version has a nominal
voltage plus minus 10%, i.e., the amplifier can
operate from 103 V to 127 V AC.
In both cases the operating voltage will be
indicated on the back panel.
INSTALLATION
7
ON / OFF
The main power switch is a push button that
turns the amplifier on/off.
When the amplifier turns on, the power LED
and protection LED are illuminated. After a few
seconds, when the start is finished the
PROTECTION LED will go out and the amplifier
will be ready for use.
To turn the amplifier off, push the button. At
that moment the main power supply voltage and
the secondary power supply voltage will turn off
internally.
Switch your sound system on from back to
front. Thus, switch on the amplifiers last on your
sound system. Switch sound sources (CDs,
turntables) first, then your mixer, then your
processors and crossovers and finally the
amplifiers. If you have more than one amplifier,
switch them on sequentially, one at a time or use a
sequencer.
Follow the reverse order when switching off,
and switch off the amplifiers before any other
element on your sound system.
Clip LED
The clip LED should never be on continuously.
This will distort the signal and may damage the
speakers. In fact, severe clipping is an easy way of
burning a speaker's voice coil.
The amplifiers feature an automatic limiting
system that impedes prolonged saturation, but the
dynamic nature of music signals stops it from
being a brick wall protection. Thus at most, the
clip light could be lit occasionally.
Level controls
The level rotary potentiometer is used for
changing the input gain. Although related to output
power, it is not a direct representation of it. Thus,
we can have maximum output power with the gain
at mid position. Similarly, we may have the gain
controls at maximum and not have maximum
output if our source signal is not strong enough.
One way to use the volume controls is to set
them such that when the mixer's faders are at
their maximum level, we are just below clipping
level on the amplifier or clipping very occasionally.
Manual de Usuario de Amplificadores
/ PA series /
User’s Amplifier Manual
