Speck XTRAMIXcxi, Reference Manual

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One of the primary reasons that the power supply of the Xtramix is
external is to insure that the power transformer enclosed within the
power supply chassis maintains a safe distance from the active
electronics of the Xtramix. For that matter, any power supply
(especially the small wall mount supplies), power amplifiers, or any
strong power field device should be kept at a reasonable distance from
the Xtramix. It is also important to keep the above mentioned devices
clear of all interface cables, audio cables and harnesses.
The external power supply for the Xtramix does not provide an AC
power switch. It is recommended the power supply be plugged into an
AC strip that uses a power switch.
The power supply should not be installed directly above or below the
mixer. It is recommended that it be installed in the rear of the
equipment rack, providing that it remains at a reasonable distance from
the mixer and cables, and has adequate ventilation.
The power supply normally generates a small amount of heat during
operation. It is important that adequate ventilation is provided when
planning the mounting location.
The power supply may be wired to operate with 100 VAC, 120 VAC,
220 VAC, 230 VAC, or 240 VAC 50/60hz. Before applying AC power,
you should verify that the voltage setting on your power supply is
configured to match the AC requirements of your country. This
procedure should be performed and checked by a qualified technician.
Unless otherwise specified on the panel of the supply, the power supply
is wired for 120 VAC 50/60Hz operation and uses a North American
IEC style AC plug.
To gain access to the inside of the power supply, it will be necessary to
remove the top cover. This is accomplished by removing the 4 screws
on the bottom of the power supply chassis. Make certain that the power
supply is unplugged before proceeding.
There are 5 terminals available on the power transformer of the power
supply. The configuration of the five terminals determine the operating
voltage of the power supply. It is only necessary to change the black
(line) and white (neutral) AC wires. Do not attempt to remove or
change the Green AC safety wire or the multicolored wires used at the
DC terminals. It is recommended that you measure the DC voltages at
the DC connector before reconnection to the mixer.
Mounting location
Configuring the AC Mains
10
Chapter 3 Installation Section