7
Depending on the input switches on the MPA6-80 (36, 37, 38, 39, 40, 41, 42, 43, 44),
located on the rear panel, four different amplification configurations can be achieved:
- Six mono amplifiers with following possibilities:
Six different mono inputs
One common mono input for all
One common stereo input for all
- Three stereo amplifiers with following possibilities:
Three different stereo inputs
One single stereo input for both
- Three bridged amplifiers with following possibilities:
Three different mono inputs
One common mono input
One common stereo input
- Combinations between mono, stereo and bridged amplifiers
3.5. Input connections
The signal input connections on the MPA4-80 (29, 30, 31, 32) and MPA6-80
(27, 28, 29, 30, 31, 32) are electronically balanced XLR-3 sockets, with an input impedance
higher than 20k
Ω
and a nominal sensitivity of 0dBV(1V). Pin assignment:
1. GROUND
2. PHASE (in phase with the output)
3. NON PHASE (inverted phase)
The following diagram shows the connection of balanced and non-balanced audio
sources:
Some of the connection options for the MPA4-80 and the corresponding switch
settings are described later in paragraph 6.2. (paragraph 6.3. for MPA6-80)
Depending on the chosen option, the SP indicators will only light for the active
channels.
Summary of Contents for MPA4-80
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