Beyerdynamic MA 212 Additional AF output 0 dB, Loudspeaker connection, Record Output, Insert

4.3 Additional AF output (0 dB)

The additional AF output (10) is unbalanced. It serves for controlling other power amplifiers. If these amplifiers have a balanced input, the shield is bridged with one of the signal inputs (pin 1 and 3). The AF output (10) allows the selection between:

1 = Microphone master

2 = Microphone and line master before insert and volume control 3 = Microphone and line master after insert and volume control

The selection is done using the jumpers (refer to chapter “9. Top view printed circuit board”).

4.4 Loudspeaker connection

The loudspeaker is connected to the loudspeaker socket (15). The output voltage of this socket is 100 V at full modulation. Low-impedance loudspeakers with an impedance of 4 to 16 Ω can be connected to the terminals 4 - 16 and COM of the terminal board (16).

Caution:

A simultaneous operation of 100 V and low-impedance loudspeakers will destroy the amplifier!

The MA 212 mixer amplifier is suitable for the connection of loudspeakers with 100 V-matching transformer. If these loudspeakers are connected to a 100 V amplifier output, they receive the full power depending on the matching. All the connected loudspeakers or their power matching result in the total power consumption. The total power consumption must not exceed the rated amplifier power, or the amplifier may be damaged.

4.5 Record Output

The record output (11) is unbalanced (0 dB), for the connection of recorders. The audio signal is the master of the microphone and auxiliary inputs before the equalisation and volume controls.

4.6 Insert

The insert socket (9) is unbalanced. External signal processing devices such as equaliser, shifter etc. can be connected. The master can be chosen before or after the equalisation control (refer to chapter “9. Top view printed circuit board”). If no plug is connected, the signal path is switched through.

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