Installation and Operation
Unpacking
Carefully open the shipping carton and check for any noticeable damage. Every Powersoft 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.
Mounting
All DIGAM amplifiers will mount in a standard 19” rack. Four front panel mounting holes are provided.
Your DIGAM amplifier uses a front to rear forced-air cooling system to maintain a low, even operating
temperature. Drawn by an internal fan, air flow through the slots in the front panel and go over and
through components. The DIGAM 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 large volume of air through the
heat sinks. If either heat sink gets too hot, its sensing circuit will reduce the output gain. 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, 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 racks with closed back, 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.
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 turned down 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.
Connecting Inputs
Input connections are made via the 3-pin XLR-female combo type connectors on the rear side of the
amplifier. The inputs are actively balanced, with polarity as shown in figure below. Input connectors
can also work with a standard stereo TRS plug.
ground
(+) (-)
ground
2
3
1
(+)
(-)
Connecting Outputs
Output connectors are made via neutrik speakon connectors. Look at the wire gauge chart to find a
suitable wire gauge to minimize power and damping factor losses in the speaker cables. The outputs
can also work
on bridge mode
. For each device the 1+ and 1- pins of speakon connector have to be
considered the positive and the negative output of a single channel; the 2+ and 2- pins of speakon
connector have to be considered the positive and negative output for bridge mode connection with the
adjacent section.
POWERSOFT
ENGLISH - 5
