Input Connections; Output Connections - Ecler MPA4-150 Notice D'emploi

3.5. Input connections

The signal input connections (20, 21, 22, 23) are electronically balanced XLR-3
sockets, with an input impedance higher than 20kΩ and a nominal sensitivity of 0dBV(1V).
Pin assignment:
The following diagram shows the connection of balanced and non-balanced audio
sources:
Some of the connection options for the and the corresponding switch settings are
described later in paragraph 6.2.
Depending on the chosen option, the SP indicators will only light for the active
channels.

3.6. Output connections

The output section on the MPA4-150 rear panel holds 8 screw-type speaker terminals
(16, 17, 18, 19), two for each amplifier.
The attenuation controls and the output configurations are described later in
paragraph 6.3.
The cable which connects the speakers to the amplifier should be high quality and as
short and thick as possible. This is important when covering long distances; For up to 10m we
recommend a cable section not smaller than 2.5mm². For longer distances we recommend
4mm².
Remember that the minimum load impedance for stereo or mono amplifiers is 4Ω. In
bridged mode the impedance must be not less than 8Ω. For a reliable operation under any
circumstance connect lower load impedances than just specified.
Attention: In bridged mode, use only the red terminals.
1. GROUND
2. PHASE (in phase with the output)
3. NON PHASE (inverted phase)
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