All material © 2010 Martin Audio Ltd. Subject to change without notice
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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.
1.3
Operating Precautions
Make sure the AC mains voltage is correct and is the same as that printed on the rear of the amplifier.
Damage caused by connecting the amplifier to improper AC voltage is not covered by the warranty. Make
sure the power switch is off before making any input or output connections.
It is always a good idea to have the gain controls muted during power-up to prevent speaker damage
particularly if there is a high signal level at the inputs.
Whether you purchase them or build them yourself, use good quality input and speaker cables. Most
intermittent problems are caused by faulty cables. Use good quality connectors and cable along with good
soldering technique to ensure trouble free reliability.
1.4
AC Main connection
The AC Main connection is made via the CPC type connector on the rear side of the panel. The figure below
shows the connection to the amplifier. Be sure that your AC mains power source has the requirements
indicated in this manual. MA12K & 12K DSP amplifiers have an automatic power factor correction system for
a perfect mains network interface. The amplifier is a resistive load for the mains network, minimizing the
reactive power and the harmonic distortion on the current. The system allows performance to be maintained
even in circumstances of varying the mains voltage.
Is important to connect the ground for safety, do
not use adapters that disable the ground connection.
