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The 9.6K, 12K & 18K 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.
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 if there
is a high signal level at the inputs.
Whether you buy them or make them, use good-quality input and speaker cables. Most intermittent problems
are caused by faulty cables. Use good-quality connectors and wire, along with good soldering technique, to
ensure troublefree 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. 9.6K, 12K & 18K 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.
1.5
Connecting Inputs.
Input connections are made via the 3-pin XLR-female type or 1/4" phone Jack connectors on the rear side of
the amplifier.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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