Ecler GPA2-400ES, Руководство пользователя

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5.3. Input signal connections
The signal input connectors are of XLR-3 and EUROBLOCK (15, 16, 17, 18) and
electronically balanced. The pin assignment is as follows:
XLR-3 EUROBLOCK
Hot or direct signal > Pin 2 +
Cold or phase inverted signal > Pin 3 -
Ground > Pin 1 Ground
For unbalanced connections, ground the pin 3 on the XLR or the negative terminal on
the Euroblock.
In balanced mode, the input impedance is greater than 20k  (10k  unbalanced),
allowing you to connect a large number of stages in parallel without compromising the
sound quality.
5.4. Subsonic filter and Power saving mode
This filter cuts off inaudible frequency components which once amplified would suppose
a risk of damage to the low frequency speakers, as the woofer’s diaphragm would be
damaged due to these low frequencies. The filter of the GPA2-400ES, which has a
Butterworth shaped response with 18 dB/oct slope, has a cut-off frequency of 50 Hz
and can be switched on or off via a switch on the rear panel.
The AUTO STBY switch allows to activate the automatic switching circuit calling the
power saving mode (low power consumption) when it detects no audio signal from the
unit's inputs during more than 90 seconds, and automatically recovering normal
operation when that signal reappears. This function is Energy Star certified, which is
only granted to products which have undergone exhaustive control and comply with the
environmental specifications required by the seal.