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MULTICHANNEL POWER AMPLIFIER V1.1 web
There are important precautions to avoid accidental short circuit or possible damage in the
equipment, in output connections.
Consider the power-handling capacity of your speakers before connecting it to the power
amplifier. Equipos Europeos Electrónicos is not liable for damage occurred by the connection of
speakers to the power amplifier with a nominal power lower that the power amplifier.
Turn off the power amplifier and turn down the input attenuators, whenever takes place
an output power connection. The output power connectors could have high voltage, with
the rising danger of short circuit.
Never put the output power connectors in parallel. This connection doesn't increase the
power and could cause the break of the power amplifier.
Do not connect the power amplifier output connectors to the output connectors of any
other power amplifier. This connection could cause the break of one or both power
amplifiers.
Do not connect the output connector ground (black binding post) to any input
connector ground (PIN 1 of the connector XLR-3-31). This could create a ground loop and
could cause feedback oscillations.
Use loudspeaker cables sizes capable to manage the output current of the power
amplifier. The selection of a good loudspeaker cable, with a good quality and an
adequate diameter is very important, and is one of the things that less is kept in mind.
The next list shows the maximum output current of the power amplifiers according to the
model:
MODEL
MAXIMUN RMS CURRENT
REQUIEREMENT
per channel (4 ohm loads)
MA80.4 4,5A.
MA80.8 4,5A.
MA150.4 6A.
MA150.8 6A
There are many factors that determine the loudspeaker cable diameter: the length of the
cable, the type of signal that is going to circulate for it, the output power of the power amplifier etc. A
cable with high resistance reduces the damping factor, limiting the power amplifier capacity for
controlling the speakers accurately. Typical values are 1 to 2,5 mm2.
The possible output connections, depends on the configuration of the MONO, STEREO, BRIDGE
mode switches on the rear panel:
CAUTION:
Do not change the configuration of ON/OFF BRIDGE switch unless the power
amplifier is first turned off. Before turn on the power amplifier, make sure that the mains, input and
