L-ACOUSTICS LA 24 MANUAL Version 2.2
17/11/08 6
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INSTALLATION
Mounting
The amplifier is two rack units high (2U) and will mount in a standard EIA 19 inch rack.
Amplifiers may be stacked directly on top of each other and there is no need for spacing
between units. If you intend to fill a rack with amplifiers, we recommend racking is 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.
Cooling
The LA 24 uses a forced air cooling system to maintain a low and even operating
temperature. All L-ACOUSTICS amplifiers are fan ventilated and have front to rear cooling
(generally there is usually cooler air outside the rack than inside). Never try to reverse the air
flow since the Intercooler® needs a pressure chamber between the fans and heat sink and
this only works for the normal front to rear direction of air flow (see Design Features on page
18).
Should a heat sink get 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.
Make sure that there is an adequate air supply in front of 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.
For fixed 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. Refer to
the section on Power Consumption on page 7.
Operating voltage
A label just below the mains cable on the rear of the amplifier indicates the AC mains voltage
that your amplifier is configured for. Connect the power cable only to the AC source referred
to on this label. The warranty will not cover damage caused by connecting to the wrong type
of AC mains.
L-ACOUSTICS switch mode amplifiers use primary switching, i.e. the mains is rectified
directly before the transformer, which means that the power supply is insensitive to the mains
frequency and will operate from DC to 400 Hz.
The amplifier is supplied with an approved European AC line connector. If this connector is
not appropriate for your country, it can be cut off and wired to a suitable connector in the
following way :
BROWN
LIVE
BLUE
NEUTRAL
GREEN/YELLOW
EARTH
