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CONTENTS
6
INSTALLATION
6.1
Mounting
The amplifier is two rack units high (2U) and weighs 7.9Kg (17lbs) 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 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.
6.2
Cooling
Your amplifier uses a forced air cooling system to maintain a low and even operating temperature. All fan cooled
MARTIN AUDIO MA series amplifiers have front to rear cooling. Never try to reverse the direction of airflow, as the
amplifier needs a pressure chamber between the fans and the internal heat sink and this only operates in one
direction of the airflow.
Make sure there is adequate air supply in front of the amplifier, and that the rear of the amplifier has sufficient
space to allow the exhaust air to escape. If the amplifier is rack mounted, do not use covers or doors on the front or
rear of the rack. If the heat sink temperature rises too high, sensing circuits will mute the hot channel. If the power
supply overheats, another sensing circuit will mute both output channels, until they cool 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. Refer to Power consumption on page 9. Remember never
rack different brands of amplifiers together that have opposing air flow characteristics.
6.3
Operating voltage
WARNING!
A label just below the mains cable inlet on the rear of the amplifier indicates the selected AC mains
operating voltage. Connect the mains 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.
If the fitted mains connector is not appropriate for your country, it can be cut off and wired to a suitable connector in
the following way:
BLACK or BROWN
WHITE or BLUE
GREEN or GREEN/YELLOW
Once connected to a suitable AC supply, the amplifier can be started with the power switch. When you power up
the amplifier it takes a couple of seconds to self check (this is known as the "soft start" or "slow start" sequence),
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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Martin Audio – MA1.3s Amplifier
8
GUIDES
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