Power Supply; Audio Connections; Preventing Malfunctions - Skytec PRO-240 Mode D'emploi

Power supply

Before connecting the amplifier to the power supply, make sure that:
- The electrical system and power socket are earthed and comply with safety regulations; (if in doubt, consult a qualified
electrician).
- The mains voltage corresponds to the voltage indicated on the back of the appliance (a deviation of +/-10 % is permitted).
- The power cord is undamaged and no wires are exposed.
- The on/off switch is in the OFF position.
The amplifier must also be switched off when the power cord is unplugged.
Switching on and off
In an audio system, the amplifier must always be switched on last and switched off first. All gain and volume controls must be
turned all the way down to avoid dangerous signal peaks.
Installation
and operation
The amplifier produces high levels of power. Therefore, it must be installed in a well-ventilated place. Never expose it to
direct sunlight, high heat, strong vibrations, dust or moisture. This will cause malfunction and may result in fire and electric
shock.
Installation and operation (cont.)
The cooling air passes through the slots on the front and rear. Therefore, sufficient air circulation must be provided around the
appliance.
If the appliance is to be installed in a rack or flight case, make sure that the air circulation is not obstructed. Never install the
amplifier in a rack or flight case with a closed rear panel.
Since some of the heat is dissipated through the metal bottom of the amplifier, it is advisable to place at least 1 U under the
amplifier when mounting it in an equipment rack.

Audio connections

Do not make any connections unless the appliance is switched off.
Only use good quality cables of the type described in this manual.
Handle the cables with care. They are often the cause of minor or major problems. Check their condition frequently. Always hold
the plug, never pull on the cable. Wind up the cables without forming knots or kinks.

Preventing malfunctions

First check whether your amplifier is exposed to interference frequencies. Do not place the amplifier near radio or TV sets,
mobile phones, etc. that may cause interference. When connecting other equipment in your audio system, be aware of ground
loops, which cause noise and affect the amplifier's excellent signal-to-noise ratio and low distortion. The best way (although not
always possible) to avoid ground loops is to connect the electrical ground of old equipment to a central point. In this case, the
central point of the system would be the mixing console. To determine the cause of the malfunction, connect the various
components of the mixing console to the rest of the equipment in the following order and listen to the outcome:
Outputs: Amplifier + loudspeaker boxes (master outputs);
Amplifier + monitor boxes (AUX outputs);
Effects (AUX outputs or EFF send/return).
Inputs: Instruments with line signals (keyboards, samplers, recorders, etc.);
Microphones (last and one at a time).
Installation
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