Unpacking
The 557 Stereo Power Amplifier comes in a box containing the following components:
❍557 Stereo Power Amplifier.
❍1 power cord.
❍2 phono shorting plugs.
❍This manual.
Once set up, the Stereo Power Amplifier can be left switched on as it consumes negligible power when not in use.
If you are not going to use the Stereo Power Amplifier for a period of several days you should switch the unit completely off, at the back panel, and disconnect it from the AC power supply.
Setting up the Stereo Power Amplifier
You are advised to retain the packing in case you need to transport the unit.
The 557 Power Amplifier weighs 27kg. Do not attempt to lift
it without assistance.
Before connecting power
Before you begin installation you should ensure that your Stereo Power Amplifier is set to the correct voltage for your local AC supply. If it is not, do not try to install the unit, and contact your dealer.
Do not make connections, or insert or remove plugs, while the unit is connected to the supply and switched on, as the transients generated could damage the loudspeakers.
To position the Stereo Power Amplifier
During normal operation the heatsinks, ie the fins at each end of the case, may become quite hot. The Stereo Power Amplifier should therefore be positioned to allow a free flow of air around the fins.
Do not place the Stereo Power Amplifier:
❍In direct sunlight.
❍Near heat sources, eg a radiator.
❍Stacked with any other audio products, as the heat it generates may damage the other products.
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