All material © 2010 Martin Audio Ltd. Subject to change without notice
6
1
Installation and operation
1.1
Unpacking
Carefully open the shipping carton and check for any noticeable damage.
Every Martin Audio amplifier is completely tested and inspected before leaving the factory and should arrive
in perfect condition. If you find any damage, notify the shipping company immediately. Be sure to save the
carton and all packing materials for the carrier's inspection.
1.2
Mounting
The MA1.4 amplifiers will mount in a standard 19" rack. Four front panel mounting holes are provided. Rear
support mounting holes are also provided. These should always we used to support the weight of the
amplifier at the rear in a 19” rack.
Your MA1.4 amplifier uses a forced-air cooling system to maintain a low, even operating temperature. Drawn
by an internal fan, air enters through the slots in the front panel and courses over and through components.
The MA1.4 series amplifiers feature an "intelligent" variable-speed DC fan which is controlled by heat sink
temperature sensing circuits: the fan speed will increase only when the temperature of either heat sink
requires it, which keeps fan noise to a minimum and helps cut dust accumulation inside. Under extreme
thermal load, the fan will force a very large volume of air through the heat sinks.
If either heat sink gets too hot, its sensing circuit will reduce the output power. If the amplifier overheats,
another sensing circuit shuts down its circuit to cut off power until it cools to a safe temperature. The exhaust
cooling air is forced out through the rear of the chassis (see below), so make sure there is enough space
around the sides of the amplifier to allow the air to escape. If it is rack mounted, make sure the exhaust air
can flow without resistance. If you are using a rack with closed backs, there must be at least one standard
rack space of opening in the front of the rack for every four amplifiers. Amplifiers may be stacked directly on
top of each other (no space needed between units), starting from the bottom of the rack.
