Beyerdynamic MA 212 User Manual

The mains cable is fixed and equipped with a ground contact.

After all connections such as mains, microphone and loudspeakers have been

completed, follow these steps to bring the system up:

1. Turn all volume controls to “0”.
2. Turn on the source equipment.
3. Turn on the MA 212 mixer amplifier with the on/off switch (7). 
4. Turn the corresponding volume control half up, with the output level control of

the source equipment turned down. There should be no audible hum. If hum is
heard, check the connections between the sound source and the mixer amplifier.

5. Using the volume control microphone (1) you can adjust the volume of the 

individual microphone inputs.

6. Using the volume control master (4) the desired volume in the room is adjusted.
7. The volume of the sound carrier input is adjusted with the volume control (2)

independent of the master volume control.

8. Activate a signal.
9. Slowly turn up the source equipment input gain controls until you begin to hear

the sound source from the loudspeakers connected to the amplifier. If the sound
is clear and undistorted, adjust the system level to the desired listening levels.

10. If you want the ducking function of the microphone inputs 1 and 2, it has to be

activated (refer to chapter “4.1.1 Priority switching”).

• The power switch is not switched to the 

ON position

• The AC plug is not connected
• The AC power source is defective

• Defective fuse

• Switch the power switch to the ON 

position

• Connect the AC plug properly
• Locate and correct the AC mains 

problem

• Check and exchange the fuse

• Turn the volume control up
• Locate and correct the short circuit

• Reduce output level of the sound 

source (for sound carriers)

• Make sure that the impedance is not 

below 4 

Ω

• Check the loudspeakers, disconnect 

one if necessary

No or distorted sound

No reproduction

• Volume control is set to “0”
• There is a short circuit on the loudspeaker 

output

• Input level is too high

• The loudspeaker impedance is too low

• There is too much loudspeaker load on the

output