9
Chapter 3
Installation
3.1 Mounting
The amplifier is one rack unit high (1U) and will mount in a standard EIA 19″ rack.
Amplifiers may be stacked directly on top of each other; there is no need for spacing
between units. If it is the intention to fill a rack with amplifiers, we recommend racking be
started from the bottom of the rack. It is also recommended that rear supports are used for
amplifiers mounted in the middle of the rack, especially if used as part of a portable system.
3.2 Cooling
Make sure that there is an adequate air supply around the amplifier and that the rear of the
amplifier has sufficient space to allow the exhaust to escape. If the amplifier is rack-mounted,
do not use covers or doors on the front or rear of the rack.
If a heat sink gets too hot, its sensing circuit will mute the hot channel. If the power supply
overheats, another sensing circuit will mute all output channels, until it cools down to a safe
operating temperature.
For installations with a central cooling system, usually found in fixed installations with a
dedicated rack room, it may be necessary to calculate the maximum heat emission. See “If,
however, you wish to tie the signal ground to chassis, connect the XLR-connector’s shell
lug to pin 1. In the interest of safety, never disconnect the earth pin on the AC power cord.”
on page 10.
3.3 Operating Voltage
WARNING: A label just below the mains voltage switch on the rear of the amplifier indicates
the AC mains voltage. Connect the power cable only to the AC source referred to on the label.
The warranty will not cover damage caused by connecting to the wrong type of AC mains.
Brüel& Kjær provides a mains cord with IEC connector for the amplifier’s mains socket and
a moulded mains plug on the other end with the appropriate plug which is standard for the
territory the amplifier is purchased in.
BE169212.book Page 9 Tuesday, January 23, 2007 9:00 AM
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