2
◊ High volumes can damage your hearing and your
headphones. Before you use the MA400, turn the MIC
LEVEL and MON LEVEL controls to 0 (zero).
(1) 12 V connector: To connect the power supply unit to the
MA400, use the 12 V connector. Connectingthe power supply
unit to the mains automatically switches the MA400 on. To
disconnect the unit from the mains, pull out the main cord plug.
(2) ON LED: As soon as the unit is connected to the mains, the ON
LED is illuminated.
(3) MIC INPUT connector: To send a microphone signal to the
MA400, you need an audio cable that includes XLRconnectors.
Plug:
• one XLR connector into the MIC INPUT connector
• the other XLR connector into the microphone
(4) MIC THRU connector: If you want to route the microphone signal
from the MA400 to a mixer, you need an audio cable that includes
XLR connectors.
Plug:
• one XLR connector into the MIC INPUT connector
• the other XLR connector into the microphone
(5) GND LIFT button: When you connect a mixer to the MA400,
keep this button pushed out to maintain a ground connection
to the mixer.
This connection prevents electrostatic charges from interfering
with your audiosignals.
However, if ground-loop hum interferes with your audio signals,
you can break the ground connection between the MA400
and the mixer. To do this, push in the GNDLIFT button.