A Speakon–¼" jack lead or a Speakon–male XLR lead MUST NOT be
used with this amplifier, due to the risk of electric shock.
Ventilation
ALWAYS ensure that an adequate flow of cool air is available at the
air intakes at the sides, and that the hot air exhaust on the front
panel is not obstructed. If the amplifier overheats the speakers will
be disconnected, and the "PRO" LED will illuminate. If the amplifier
is adequately ventilated, this will not happen during normal use.
If the amplifier is installed in a cupboard, make sure that there is an
adequate supply of cool air at the back of the amplifier, and that hot
air from the fan exhaust is not recirculated back to the air intakes.
The fan and air vents should be cleaned periodically to remove dust
and smoke fluid residues.
NEVER install the amplifier in a sealed cabinet.
Operation
ALWAYS connect the speakers and turn the volume controls to zero
before switching on; do not touch the speaker outputs whilst the
amplifier is running as this could result in electric shock.
Set the input level controls so that the “clip” LEDs only illuminate on
the loudest peaks when the levels on the mixer are at their highest
setting.
If the amplifier is being asked to produce more power than it can
supply it will ‘clip’ the signal, and if this happens the Clip LED will be
illuminated. In this state, the amplifier can produce an output in
excess of 1500 Watts per channel at levels of distortion up to 30%,
which could cause damage to speakers. This distorted signal has a
large amount of extra treble which can damage high frequency
units.
If the "clip" indicators are on excessively there is only one solution:
TURN THE VOLUME DOWN.
Choosing loudspeakers.
If the amplifier is likely to be over-driven, then it is advisable to use
speakers which can handle the extra power. Use a 600 W 4
W
speaker, or, if two 8
W
speakers are connected to each channel, they
should be rated at 300 W each. Using a 200 W and a 400 W together
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