Operating Voltage; Grounding - DAD FZ10004 User Manual

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2.4 OPERATING VOLTAGE

The label placed to the right of the mains cable on the rear of the amplifier indicates the AC mains volt-
age for which the amplifier is wired and approved: 110V or 220V. Connect the power cable only to the
AC source type referred to on the label. The warranty will not cover damage caused by connecting to an
incorrect type of AC mains.
The switch mode amplifiers use primary switching. Because the mains power is rectified directly in front
of the transformer, the amplifier is insensitive to mains frequency. It may be connected to 50 or 60 Hz
sources, and actually will operate on line frequencies from DC to 400 Hz.
The amplifier uses POWERCON connection. If the power plug mounted at the factory is not appropriate for
your country, it can be removed and the proper connector wired in its place as follows:
Wire Distribution:
WHITE LIVE
BLACK NEUTRAL
GREEN EARTH(GROUND)
If you are not 100% confident of your competence to replace the mains plug, engage qualified personnel
to do the job.
Once a suitable AC supply is connected, the amplifier can be turned on using the front panel power switch.
The amplifier then goes through a soft-start. The fans will blow at high speed before dropping to idle, and
the power LED will illuminate.
Inrush power is controlled and limited during soft start , enabling multiple amplifiers to be powered up
simultaneously.

2.5 GROUNDING

There is no ground lift switch or terminal on the amplifiers. The signal ground is always floating, via a res-
tor, to chassis and therefore the grounding system is automatic.
In the interests of safety, never disconnect the earth (ground) pin on the AC power cord.
Use balanced input connections to avoid hum and interference.
FZ10004